Will,
I've tried a couple of times to contact you by email regarding whether you
intend on obtaining the remaining DEC gear I still have. Didn't bounce back
but I figure maybe Hotmail doesn't notify senders of non-delivery. Anyway,
could you get back to me ASAP with your intentions on this stuff? I must
move on this soon as I need the space very much.
Apologies to the list for using the bandwidth.
-Chris
-- --
Christian Fandt, Electronic/Electrical Historian
Jamestown, NY USA cfandt(a)netsync.net
Member of Antique Wireless Association
URL: http://www.antiquewireless.org/
Yes, providing a default ROM monitor program would be useful and
simple to implement.
The Otrona Attache would go into terminal mode if it couldn't
boot the OS. It also provided a set of diagnostic routines
that could be run from terminal mode.
I agree with you that error messages should be more informative.
One problem is that they often just tell you the last of a series of
errors. "No ROM Basic" accurately describes the last "error," but it
might be more useful to the user to also know that the system got to
that point because it couldn't boot from disk.
- Bob
-----Original Message-----
From: ard(a)p850ug1.demon.co.uk [mailto:ard@p850ug1.demon.co.uk]
Sent: Wednesday, October 03, 2001 5:43 PM
To: classiccmp(a)classiccmp.org
Subject: Re: IBM ROM BASIC or lack thereof
<snip>
I wish more manufacturers would put a program in the boot ROM that allows
reading and writing to memory, running (machine code) programs and
preferably also reading/writing I/O ports (if they're not memory mapped).
It makes debugging the machine a lot easier if it can't boot a disk (or
if you don't have a bootable disk for the machine, at least you can do
something with it.
Tiny (or otherwise) BASIC allows one to do this. So does Forth. Or just a
little machine code monitor. With ROM space being so cheap these days
you'd have thought they could find room for something like this...
-tony
The 8271 is a poor choice as it does not do MFM (double density).
Either use 8272 or the 1770 you have. The 1770 does not overclock
reliably.
Allison
-----Original Message-----
From: Philip Pemberton <philpem(a)bigfoot.com>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Friday, October 05, 2001 12:20 PM
Subject: 6502 BASIC or Assembler and Intel 8271/WDC 1770 info req'd
>Hi,
> I'm building myself a 6502-based single-board computer, with the aim
of
>running it off a 4.8V NiMH or NiCad battery pack. But I've got a
problem. I
>need a programming language for it. Aparrently there were many BASIC
>interpreters sold for the Synertek SYM-1 (aka SY-VIM-1), MOS KIM-1 and
>Rockwell AIM-65. Anyone know what happened to the companies that
produced
>these? Ideally I'd like the source code for a 6502 BASIC interpreter,
but
>binary code would be OK too. The SBC will communicate via a small LCD
panel,
>RS232 (so I can hook it up to a "dumb terminal") and will have a
hexadecimal
>keypad and an optional hard drive, too. Anyone care to make any
suggestions
>(or submit some code)?
>
>BTW, I also need some info on the Intel 8271 disk controller - I've got
two
>of these little devils and Intel's datasheet makes absolutely no sense
at
>all. I've also got a Western Digital WD1770-PH 00-02 that I might be
able to
>use instead. First of all, which is the better controller? The 8271 or
the
>1770? Also, is it possible to overclock a 1770 or an 8271 like you can a
>1772?
>I'd love some schematics and/or some source code. I really don't fancy
>disassembling Acorn's 8271 DFS and Watford Electronics' 1770 DFS...
>
>Thanks.
>--
>Phil.
>philpem(a)bigfoot.com
>http://www.philpem.f9.co.uk/
>
Ethan Dicks wrote:
>one aspect of classic kit building I have a question for the group
>about is, what about stuff that we built ourselves 10+ years ago that
>still works, but might need some touch-up.
If the solder joint in question meets the following criteria:
a) bad enough that fail-open is a credible risk
b) in a pathway such that fail-open could cause damage to other components
(particularly hard-to-replace ones)
I'd say it should be retouched. In any other case, I'd say that the risk of
damage, plus the loss of historical value, are convincing arguments to
leave it alone.
Bottom line, though, is that they are your kits, and whatever you
want to do with them is Ok.
Good question, though.
- Mark
A book that the VCF and many computer collectors prominently figure in is
coming out on November 1. It's called _Artifacts: An Archaeologist's Year
in Silicon Valley_ by Christine Finn. Those of you who have been to a VCF
in the past year and a half will recognize her as a recurring speaker.
A website has been established for the book at:
http://www.artifactsthebook.com/
Tonight is Christine's first book reading at a bookstore in Menlo Park,
California. If you are a local and would like to attend, the information
is posted to the website above.
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
On October 5, Brian Knittel wrote:
> > I believe the first voice-coil drvie in that family was the ST-4096,
> > but I'm not positive of that. That was one nice drive.
>
> A nice drive? You must have gotten the one that worked. I ran
> into 5 or 6 of them, and after a couple of months, every one of
> them failed, as did their warranty replacements. I only found
> one that ended up being useful for several years (as a door stop).
>
> They sounded like chain saws.
Hmm, interesting. I installed about two dozen of them in customer
machines with no problems. They were all relatively close together
time-wise; I suppose I got lucky and scored a batch from a good
production run.
-Dave
--
Dave McGuire
Laurel, MD
> I believe the first voice-coil drvie in that family was the ST-4096,
> but I'm not positive of that. That was one nice drive.
A nice drive? You must have gotten the one that worked. I ran
into 5 or 6 of them, and after a couple of months, every one of
them failed, as did their warranty replacements. I only found
one that ended up being useful for several years (as a door stop).
They sounded like chain saws.
brian
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
_| _| _| Brian Knittel / Quarterbyte Systems, Inc.
_| _| _| Tel: 1-510-559-7930 Fax: 1-510-525-6889
_| _| _| Email: brian(a)quarterbyte.com
_| _| _| http://www.quarterbyte.com
Ideally I'd like the source code for a 6502 BASIC interpreter, but
binary code would be OK too.
Phil, go see http://www.geocities.com/leeedavison/ .
You'll find what you want there.
Lee.
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>> Anybody know of any online TECO manuals? I've got a set of
>> DECsystem-10 TECO manuals that I'll scan if they dont already
>> exist online....
>
>I'm not aware of any TECO manuals online, and I'm almost positive that there
>aren't any DECsystem-10 TECO manuals online. These would be a great
>addition.
There's a bunch of TECO stuff over at
http://www.ibiblio.org/pub/academic/computer-science/history/pdp-11/teco/
but I don't think there's a TECO-10 manual.
There is, however, a TECO-6 manual at
http://www.enteract.com/~enf/lore/teco/teco-64.html
What I'm looking for is a piece of software called "Video TECO". It's
a fairly nice (from my limited perspective) full-screen TECO in C that
I used for some time under Ultrix. I still have a printout of the manual
somewhere, but I seem to have lost my copy of the sources and haven't
been able to find a site online containing it.
Roger Ivie
ivie(a)cc.usu.edu
Does any one have the source code to Xinu for the Z80 (prefered) or the 68K?
I'm working on Circuit Cellar's HCS II (10 in Jan a now Open Sorce :-)
and I'd like to take advantage of Xinu and Zilog's newer Z80 derivatives.
Thanks
--
Linux Home Automation Neil Cherry ncherry(a)home.net
http://members.home.net/ncherry (Text only)
http://linuxha.sourceforge.net/ (SourceForge)
http://hcs.sourceforge.net/ (HCS II)
Greets,
arm6.tif.1 worked this time, but 2 & 3 still show "Not a valid TIFF" in Paint Shop Pro.
Bob Mason
"Sean 'Captain Napalm' Conner" <spc(a)conman.org> wrote:
>It was thus said that the Great Mike once stated:
>>
>> From: Chris <mythtech(a)Mac.com>
>> > Can you get pic 2,3 or 6 to open? I can't get them to work (your
>>
>> OK, I reuploaded 2,3, and 6 to the same spot. Try them again at:
>>
>> http://personal.lig.bellsouth.net/lig/d/o/dogas/arm2.tif
>> http://personal.lig.bellsouth.net/lig/d/o/dogas/arm3.tif
>> http://personal.lig.bellsouth.net/lig/d/o/dogas/arm6.tif
>
> I just resnagged them and you can view them at
>
> http://www.flummux.org/radio/
>
> The original ones I snagged earlier are still there under the original
>name, while the new ones have a `.1' extention. If someone can test them
>and get back to me, I would appreciate it.
>
> -spc (They are different, even if they are the same file size ... )
>
>
--
Bob Mason
2x Amiga 500's, GVP A530 (40mhz 68030/68882, 8meg Fast, SCSI), 1.3/3.1, 2meg Chip, full ECS chipset, EZ135, 1084S, big harddrives, 2.2xCD
Gateway Performance 500 Piece 'o Crap, 'ME, 128meg, 20Gig, flatbed.
Heathkit H-89A, 64K RAM, hard and soft-sectored floppies, SigmaSoft and Systems 256K RAM Drive/Print Spooler/Graphics board HDOS 2 & CP/M 2.2.03/2.2.04
__________________________________________________________________
Your favorite stores, helpful shopping tools and great gift ideas. Experience the convenience of buying online with Shop@Netscape! http://shopnow.netscape.com/
Get your own FREE, personal Netscape Mail account today at http://webmail.netscape.com/
On topic: Leave your old hardware the way it is, for historical reference.
Off topic: Coins are so boring ;) (though they last and are dated; I admit I
have used them myself, though). When I backfilled my excavations of a 3000
BC temple mound on the Peruvian coast, I put a basket-full of old shoes in
first (the site was being used as the modern town's garbage dump). In
another case, I dumped a load of washed and sorted shells in a pit at a
village site, and put in a dated newspaper page. A few years later, another
group re-excavated at the village, found the shells, but thought the
newspaper was intrusive (there is a lot of site looting in Peru) until they
happened to mention to me the "cache" of shells they found, whereupon I told
them what had happened.
-----Original Message-----
From: Ethan Dicks [mailto:erd_6502@yahoo.com]
Sent: Thursday, October 04, 2001 10:17 PM
To: classiccmp(a)classiccmp.org
Subject: Restoring classic kits we built way-back-when
<snip> Specifically, I have several things <snip> that
I made when I was a teenager. <snip> I'm debating re-soldering these items
<snip>
I took history and archaeology in school; <snip> When my
advisor restored the bed of a large monochrome mosaic near Isthmia, he
threw several modern coins into the concrete bed so that future
excavators would know that it wasn't ancient concrete.
<snip>
-ethan
>That's true :). I'm sort of doubting that about the H50 because it's just so
>fast (well, 96MHz) but the memory helps out a lot. The CPU is a pain in the
>back to carry though. Nearly broke my back when carrying it up the stairs.
Pull the power supplies and disk cages next time.
Am scrapping several DEC LA100 DM and Diablo/Wang HyType DW printers; anybody need any parts before they go?
Also have manuals including Service manual for the LA100.
mike
mhstein(a)usa.net
I have HP/847S and found it to be a very effective space heater. Since I
wasn't particularily impressed with it's performance, I have opted to run a
smaller and more energy friendly HP/832.
I use my HPUX box(s) primarily as a database server (running APACHE, PERL,
and INFORMIX), application develpment using a Z80 cross assembler, and a
backup system for all my other "stuff". I have more trust in 9-track tapes
than other backup media.
As part of their Y2K support program, HP offered HPUX-10.2 as a free
upgrade. The upgrade package included everything you would need to get your
box up and running. As far as I know, the upgrade program has been
discontinued.
You can find release notes and installation instructions at:
http://docs.hp.com
As I recall, the basic install will give you licenses for two concurrent
users. Additional licenses can be activated by installing the license
upgrade. This requires a key to activate. The keys were provided by HP with
the upgrade based on the number of licenses the user had previously bought.
As with the software, those "Free" license upgrades are probably no longer
available.
Some of the CDs included applications but, you need keys to install them. An
alternative is to download and install apps from the HPUX freeware site
(http://hpux.cs.utah.edu ).
Send me your address off list and I'll get a copy of the OS to you.
NOTE: You'll need a bootable CD player to install the software.
ALSO --- If any your disks already have an OS installed, there is a simple
way to circumvent the ROOT password.
SteveRob
>From: jarkko.teppo(a)er-grp.com
>Reply-To: classiccmp(a)classiccmp.org
>To: classiccmp(a)classiccmp.org
>Subject: HP 9000/847S
>Date: Wed, 3 Oct 2001 09:16:35 +0300
>
>Hello,
>I just picked up a 9K 847S, upgraded to H50 with two SCSI-buses, one mux
>panel, a few disks and 384MB of memory (hmmmmm...). I'm not sure on the
>ten year rule as I'm relatively clueless regarding this machine. This is
>my second PA-RISC machine and it seems refreshingly better than the 840.
>
>A few questions:
>a) Introduction date ?
>b) Where can I get HP-UX 10.x cheaply :)? (ie. for free)
>
>--
>jht
_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp
Hello,
I have been offered a rather large collection of machines, including an
IBM PC with the original monitor, and an IBM 4965 with an 8" floppy drive.
The 4965 is mounted in a large white rack, with a power supply mounted at
the bottom, and the cover has been removed from the power supply, Anyone
know anything about these machines? It looks as though all the original
disks and documentation is there, but I am wondering whether its worth my
time to clean this up.
Zach
On Oct 4, 17:22, John Foust wrote:
> At 05:36 PM 10/4/01 +0000, Pete Turnbull wrote:
> >The easiest way to deal with it is to ensure that the loft
> >is ventilated, but a better way would be to use a dehumidifier. They're
> >not too expensive to run (at least, not compared to heating or air
> >conditioning)
>
> They're like little refrigerators, and most of them
> aren't very smart about the set-point you've selected
> in consideration of the actual temperature and humidity,
> so they'll happily run when they can't do their job.
> They work by condensation on the cooled coils.
That's a good description, and it's true they're not very smart, but they
do work. If the air gets too cold, just run a PDP-11 to warm it up :-)
--
Pete Peter Turnbull
Network Manager
University of York
Anybody know of any online TECO manuals? I've got a set of
DECsystem-10 TECO manuals that I'll scan if they dont already
exist online....
Bill
--
Bill Bradford
mrbill(a)mrbill.net
Austin, TX
On Friday, October 05, 2001 12:58 AM, Absurdly Obtuse [SMTP:vance@ikickass.org]
wrote:
> On Thu, 4 Oct 2001, Dave McGuire wrote:
>
> > The ST225 was indeed 65ms...scary slow. It made a great distinctive
> > "peep-peep" sound, though...which I liked even more than the [still
> > rather cool] "chirp-chirp" sound of the ST251 and ST251-1. :-)
>
> I *love* that sound. Another good one is the IBM WDA-105. That was a
> nice-sounding drive. Another melodic one. Only 5 megs though.
>
> Peace... Sridhar
I used to have a pair of full height Micropolis that sounded just wonderful..
Jet-engine
noises on startup, and a thick twang-beeeeep sound when it seeked.
Dun remember what model, and I'm too lazy to dig em out and see, but I'm sure
they
were 170M units.
Jim
Tony Duell wrote:
> However, I've seen too many computers with incorrect labelling. I've seen
> PCs with a DE9 COM port with a mouse icon over it. OK, so the
> pre-installed version of Windows presumably expected a serial mouse on
> COM1: . That does not make that port a mouse port, though, at least not
> to a hardware hacker like me.
You are absolutely right that the port is not a "mouse" port, but if it has
a picture of a mouse next to it then Suzy will know where to plug her mouse
in.
Glen
0/0
This was just passed on to me:
-----Original Message-----
From: Francis Girard [mailto:fgirard@cisco.com]
Sent: Thursday, October 04, 2001 11:23 AM
To: canada(a)cisco.com; sales-eng(a)cisco.com
Subject: Anyone looking for an MSM Terminal Server for their museum???
A customer just called me to inform me that they're about to throw away about 10 very special terminal servers. They bought these back in 1990, and have serial numbers 000001 through 0000010! Hydro-Quebec may have very well been the first customer to purchase our MSM Terminal Server. I have no idea what these look like, but their still functional.
Is anyone interested in these??? Let me know ASAP as he's about to junk them. Note that, although he didn't suggest any form of compensation, I'm sure this customer would be very pleased of getting some sort of promo item (please, not a stress ball)....
Let me know.
Francis
--------------------------------------------------------------------------------
Francis Girard
Ing?nieur de r?seau
Les Syst?mes Cisco Canada Cie
1501, avenue McGill College, Bureau 600
Montr?al (Qu?bec) H3A 3M8
Tel : (514) 847-6853
Fax : (514) 847-6802
Pager : 1-800-68CISCO
fgirard(a)cisco.com
www.cisco.com
--------------------------------------------------------------------------------
My acquisition rate has exceeded my storage capacity so am making the
following available to list members pre-eBay. Bigger items to Houston
area only, (no shipping at this time).
All items in working condition unless otherwise noted.
IBM RS/6000 7012-370;aix3.x, kb, mouse, no key, FREE
no pwd,1gb hd, fdd, xtra boards, vid cable
DEC PDP 11/73; ba23, m8190ab, m8637dh, rx33, rqdx3 $100
rlv21,dhq11, rd52(doa), rt11 v5.4d kit
RA81 logic bd; cond ? FREE
ACT-10340 qniverter $10
mvII cpu+mem; m7606af, m7608bp $5
mvII cpu+2mem; m7606et, m7609ah, m7609ap $10
dssi m7769;s-handle $10
MAC 6100/66; w/DOS board, kbrd, mouse FREE
MAC 6100/66, not working FREE
MAC IIci FREE
DEC ba23 cabinet, unpopulated FREE
DEC ba213 cab, unpopulated FREE
DEC sz-12 storage expansion; rz55 FREE
DEC Ext Strage box, rz56 FREE
Vaxstation 4000/model 60;no hd $25
Vaxstation 3100/m76 SPX; vms6.x $25
Vaxstation 3100/m76 SPX $20
Microvax 3100/20e; vms $20
Infoserver 100; rz23(2)rrd.. $10
VT420 / LK401 $10
-nick o
281-553-6507
I found one DSSI cable to connect one of my two HSD05 controllers
to my VAX 4000/500 (I'm still looking for another). I've read that
the HSD05 controller is not very fast, so I used the disk speed
benchmark mybenchmark and tested an RZ28B vs. an RF72 and find the
HSD05-connected RZ28B is slightly faster than the RF72. I'm going
to test my RF73 tomorrow. I'm curious as to whether the smaller
RF3x drives are faster than the RF7x drives. Does anyone have any
benchmarks?
--
Eric Dittman
dittman(a)dittman.net
Check out the DEC Enthusiasts Club at http://www.dittman.net/
Louis Schulman wrote:
> #I have come across an Osborne model OCC1 Serial # 134033. This unit has
the
> #300 baud modem. It also has 5 1/4 disk with it. (SuperCalc, WordStar,
> #Qbasic) The unit boots up and runs the software but after about 15 to
20
> #minutes it starts to overheat.(smoke)
> #My question is - What is the selling price for a unit like this and
where
> #would be the best place to sell it?
>
> Well, I have a related question. I have an '86 Dodge that runs fine for
10 or 15 minutes, but then the
> passenger compartment fills with smoke and flames shoot out of the grill.
>
> What is the blue book on an "86 Dodge with flames and smoke?
(Louis, that's *funny*!)
Uh, the blue book value is -$10,000 -- you'd have to pay me to take
possession of it.
I hate to tell this guy but I think the last thing most of us wants is
another insane computer . . .
Glen
0/0
> them) or leaving them the way they are a) because if it works, don't
> screw with it, and b) it's a snapshot of my own context in the greater
> historical framework.
Personally I think the real issue here is that if it works don't mess with
it. So your soldering might be sloppy. Big deal.
Yes, I'm a big fan of if it works don't mess with it.
Zane
After Tony's suggestion that I test our faulty LK201s with a VT terminal, it
turned out that both worked fine with a VT420. So I thought I'd give our
LK401s a try as well. And it actually turned out that one worked! The other
still didn't. I opened them up and connected them to the VT, and after a
while, I noticed that a small (14 pins DIL?) Motrola IC called LC74750P was
much hotter on the faulty board. I established that the fault was on the PCB
by connecting the working one to the keyboard matrix of the faulty one. The
74750P was only pleasantly warm in the functioning keyboard, whereas it got as
hot as a Pentium processor after a while on the faulty PCB.
So I thought I just had to nip down to the shop and get some standard TTL (it
does begin with a 74...) chip and solder back (in a socket =). No such luck.
The clerk couldn't find the chip in store, in any catalogue or any databook.
He suggested that it might have been made as a batch only for DEC.
Does anyone know what kind of chip this might be, and if it's available
anywhere?
As for the LK401, the PCB contains three ICs:
1 ? 74750P (???)
1 ? i8051 (microcontroller, does this have some on-board ROM which prevents
drop-in replacement?)
1 ? AMTEL something or other. Could it be a ROM?
--
En ligne avec Thor 2.6a.
Die Malerei ist stumme Poesie, die Poesie blinde Malerei.
--- Leonardo da Vinci
On October 3, Ethan Dicks wrote:
> RD50 - ST506
> RD51 - ST412
> RD52 - Quantum 540?
Yes, Q540.
> RD53 - Micropolis 1335
> RD54 - Maxtor XT2190
> RD31 - ST225
> RD32 - ST241-1
Just a nit...the RD32 is an ST251...not a -1 model. The ST251 had
an average access time of 40ms (if memory serves) and the ST251-1 was
28.5ms. An easy performance upgrade for RD32-based systems is to
replace the DEC-badged Seagate ST251 with an ST251-1...the controller
won't know the difference...but the user will! :-)
-Dave
--
Dave McGuire
Laurel, MD
http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1280822959
I have been considering buying one of these machines as an investment.
While I am a computer programmer by trade, I have no clue how to operate
or program one of these things which really does not matter since I would
be buying it as an investment.
Any comments concerning what would be considered a "fair price" on
this machine would be appreciated. I seem to recall seeing one sell
on EBAY a few months ago for around 1800.00 but I don't think it had
a monitor and drives.
My guess (given the current economic situation) is that 1800.00 - 2200.00
might be sufficient to win the bid on this box.
Comments?
Might anyone have a copy of Superfile for DOS they can shoot over to me?
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
Jeffrey S. Sharp wrote:
> You forget: when this was state of the art, the vast majority of users
> were just like Tony.
Well, the thing is, the message was on mobos long after it was state of the
art, which was my original point -- why was the message still there, when
the BASIC wasn't.
Also, *no one* is/was "just like Tony" :>) (Tony -- this is a compliment
;>)
Glen
0/0
On Oct 4, 11:48, SUPRDAVE(a)aol.com wrote:
> Most halfway modern things have environmental criteria for when it's
running
> and when it's off. For humidity, I've seen the storage range be from
5%-95%
> noncondensing and temp range from 0F-110F when not running. I'm running
out
> of space as well finally, but will not store things in the roof.
The key word in there is "noncondensing", which isn't likely to be the case
part of the time, unless you do something about it. Corrosion could be a
real problem. The easiest way to deal with it is to ensure that the loft
is ventilated, but a better way would be to use a dehumidifier. They're
not too expensive to run (at least, not compared to heating or air
conditioning) and you could run a short drain hose out of the dehumidifier
and out of the loft to dispose of the water.
> ----- Original Message -----
> From: "Rich Beaudry" <r_beaudry(a)hotmail.com>
> > Since I am rapidly exhausting all space in my basement workshop, I
need to
> > move some of my computers to the loft above our garage. The problem
is,
> the
> > garage is completely UNinsulated, and has only a metal roof (i.e.,
thin,
> and
> > NO resistance to temperature -- hot or cold).
--
Pete Peter Turnbull
Network Manager
University of York
finally back online with a mailer here. Still getting used to Linux PC
over my Amiga 3000.
Just for some laughs out there, I want to pass this along . . . .
I downloaded about 20k, yes 20,000 emails. Seems my former (and
present) ISP maintaianed my email addy and there was an accumulation of
emails from last February.
took about 7 hrs to dowload, and another 6 to chip through them.
Might this be a Guiness Book world's record??
gary Hildebrand
> >I suppose you *COULD* write a driver that lets you use the board
> >for non-booting devices if you had enough information available.
>
> That depends on exactly why the firmware
> will not play with VAX. My *guess* (based
> on exactly no information ...) is that it has
> intimate knowledge of some internal
> OpenVMS Alpha data structure (page
> tables or such like).
That's what I meant by enough information. You'd need the source for
OpenVMS Alpha, OpenVMS VAX, and the driver as the bare minimum along
with hardware specs.
> So it is quite possible that you would need
> to re-write the firmware to be able to do
> *anything* with the board at all.
Or you could possibly do the setup in the driver initialization.
It would be much simpler to use a CIXCD to an HSJxx controller.
When you factor in the development costs the CI solution would
be much less expensive as well.
We use CIXCD boards in our VAX 7730 systems (actually two for
redundancy to dual Star Couplers).
--
Eric Dittman
dittman(a)dittman.net
Check out the DEC Enthusiasts Club at http://www.dittman.net/
Tony stated:
> FWIW, I have never treated _anything_ as a black box where I don't have
> to care about what goes on inside. I find it's easier to do good work if
> you do understand the internals of the tools and equipment that you are
> using. And therefore I have little time for people who aren't prepared to
> learn about the insides of their computer/car/whatever...
>>>> start of OT rant
Although I like to be able to know about the "inside" of things, I am not
convinced that it is possible to have anything more than a simplistic view
(or even that much) for some things. GSM phones are, at best, borderline.
DAB ("Digital Radio") seems to have gone to the level where only a very
small proportion of the population (possibly less than a few thousand people
worldwide) can really and accurately claim to fully understand how it
works*. It worries me somewhat that such a technology is being deployed (as
also does the potential for control by government and big business that is
lacking in AM and FM radio), but possibly such complexity is inevitable.
* sure, I can waffle on about using a spread spectrum technique in Band III
to transmit a multiplexed bit stream than demultiplexes to several
compressed sequences of digital samples - I might even, with a little
research, be more convincing about how this bit stream is handled - but as
for really understanding the transmission mechanism, "pass"!
<<<< end of OT rant
Andy
> Eric Dittman wrote:
>
>I suppose you *COULD* write a driver that lets you use the board
>for non-booting devices if you had enough information available.
That depends on exactly why the firmware
will not play with VAX. My *guess* (based
on exactly no information ...) is that it has
intimate knowledge of some internal
OpenVMS Alpha data structure (page
tables or such like).
For example,
the DMB32 did exactly this - it could run
in at least 4 different modes: given physical
address (PA), given PA of a VAX page table,
given SVA of buffer and given SVA of
process page table. I assume the firmware
engineers had time to kill :-)
So it is quite possible that you would need
to re-write the firmware to be able to do
*anything* with the board at all.
Antonio
> > Does that apply to all revisions of the XMI SCSI?
> >
> > > > T2029-AB XMI-SCSI adapter
> > >
> > > The XMI-SCSI adapter is only supported on Alpha systems.
>
> That applies to all revisions. There are no VAX drivers for the
> card in VMS.
AFAIK, there is no VAX-compatible *firmware*,
so you cannot even hope to write your own
drivers ...
Antonio
> T2029-AB XMI-SCSI adapter
The XMI-SCSI adapter is only supported on Alpha systems.
--
Eric Dittman
dittman(a)dittman.net
Check out the DEC Enthusiasts Club at http://www.dittman.net/
>Sometimes a network connection, even old slow LocalTalk is the most
>convient thing to use.
Up until the power supply blew on my Powerbook... I always carried this
little pair of Farallon adaptors for localtalk. They were single RJ-11
connectors that plugged into the printer port (basically a standard
teletalk connector, but the 2nd port was permanently terminated). They
took almost no space (about an inch square for the pair), and almost no
weight (maybe an ounce for the pair), and used my already carried modem's
phone cord to connect between.
I think hardly a meeting went by that I didn't use them to transfer files
to someone else's computer. Localtalk was always pleanty fast for moving
a few word files or a powerpoint presentation... and used WAY less
battery power than the IR port (and was easier to use, as I had a
Powerbook 1400 which used apple's crappy slow IR protocol, most other
people had nicer, newer ones that used IRda, and although could "dumb
down" to apple's, it just sucked).
-chris
<http://www.mythtech.net>
> > > Does that apply to all revisions of the XMI SCSI?
> > >
> > > > > T2029-AB XMI-SCSI adapter
> > > >
> > > > The XMI-SCSI adapter is only supported on Alpha systems.
> >
> > That applies to all revisions. There are no VAX drivers for the
> > card in VMS.
>
>
> AFAIK, there is no VAX-compatible *firmware*,
> so you cannot even hope to write your own
> drivers ...
Yes, I forgot to mention the lack of firmware as well.
I suppose you *COULD* write a driver that lets you use the board
for non-booting devices if you had enough information available.
--
Eric Dittman
dittman(a)dittman.net
Check out the DEC Enthusiasts Club at http://www.dittman.net/
Most halfway modern things have environmental criteria for when it's running
and when it's off. For humidity, I've seen the storage range be from 5%-95%
noncondensing and temp range from 0F-110F when not running. I'm running out
of space as well finally, but will not store things in the roof.
In a message dated 10/4/2001 10:18:11 AM Central Daylight Time,
menadeau(a)mediaone.net writes:
<< Extreme cold will damage LCDs--I live in NH, and lost an IXO handheld
terminal that way. At my previous home, my storage was similar to what you
describe. Also, the heat of an attic will warp some plastics, and I suspect
that it accelerates the yellowing process. I didn't have a problem with
circuit boards, however. Hot and cold extremes will not be kind to software
or to some types of paper. Temperatures aren't the only thing you have to
worry about with the type of storage you describe. Vermin (insects, spiders,
mice, bats) will also be a problem. I kept my stuff covered with old
blankets and tarps to cut down on damage from dust and droppings. The
coverings will also help with certain weather conditions common to New
England. In springtime when the humidity is high and the temperature rises,
moisture will form on metal and plastic surfaces.
--Mike
Michael Nadeau
Editorial Services
603-893-2379
----- Original Message -----
From: "Rich Beaudry" <r_beaudry(a)hotmail.com>
To: <classiccmp(a)classiccmp.org>
Sent: Thursday, October 04, 2001 10:06 AM
Subject: Cold/Hot storage of computers -- OK?
> Hello all,
>
> Since I am rapidly exhausting all space in my basement workshop, I need to
> move some of my computers to the loft above our garage. The problem is,
the
> garage is completely UNinsulated, and has only a metal roof (i.e., thin,
and
> NO resistance to temperature -- hot or cold).
>
> My concern is that the cold of winter or the heat of summer might get to
> them. I live in Massachusetts, so winter is not -40 degrees F, but we
are
> talking below freezing, and possibly below zero for short stretches. In
the
> summer, it must easily hit 100 degrees F in the loft, due to the hot metal
> roof, and the trapped air (no windows!).
>
> I'm not so worried about the circuit boards, but I am worried about floppy
> drives, hard drives, and CRTs. Does anyone know if such temperatures will
> kill these things? Obviously I would let the computer acclimate for about
> 24 hours after I move it back into my house, to avoid sudden temperature
> swings, or condensation. I'm more worried about the storage affecting
> them....
>
> Thanks!
>
> Rich B. >>
Hello all,
Since I am rapidly exhausting all space in my basement workshop, I need to
move some of my computers to the loft above our garage. The problem is, the
garage is completely UNinsulated, and has only a metal roof (i.e., thin, and
NO resistance to temperature -- hot or cold).
My concern is that the cold of winter or the heat of summer might get to
them. I live in Massachusetts, so winter is not -40 degrees F, but we are
talking below freezing, and possibly below zero for short stretches. In the
summer, it must easily hit 100 degrees F in the loft, due to the hot metal
roof, and the trapped air (no windows!).
I'm not so worried about the circuit boards, but I am worried about floppy
drives, hard drives, and CRTs. Does anyone know if such temperatures will
kill these things? Obviously I would let the computer acclimate for about
24 hours after I move it back into my house, to avoid sudden temperature
swings, or condensation. I'm more worried about the storage affecting
them....
Thanks!
Rich B.
I'm trying to help a friend of a friend interface an Okidata 600e printer
with a Radio Shack Model 12 computer. Any idea if this is possible? He
claims to have created an interface cable, but it doesn't work.
Robert Matthews
Please contact Matt directly if you are interested in this system.
Kevan
---------- Forwarded message ----------
From: Mail <info(a)rothenberger.co.uk>
Subject: MAI Computer
Our company has in storage a MAI Basic 4 Information System,which I believe
to be complete and functioning. We have no use for this and would be
grateful if you could let me know whether this has any value and/or any
people or companies you know of who might be interested in making me an
offer.
Matt Maguire
Supply Chain Manager
(Rothenberger UK Ltd.)
My $10.00 (not including packing and shipping... Ouch!!!)
System 36-5363 arrived today!!
It is much bigger than I thought!
The case is built like a tank
How do I get it open???
I got the back cover off, no problem...
There is no obvious way in.
Any hints would be greatly appreciated.
Mike
--
===============================================================================
Michael L. Drew
Drew Technologies, Inc.
41 Enterprise Drive
Ann Arbor, MI 48103
Phone: (734) 623-8080
Fax: (734) 623-8082
===============================================================================
Hi,
I might purchase some VAX boards for a good price, which I need
to negotiate first and I need some help with finding out if I
can use those in a VAX 6000-400 and/or -600 (XMI, VAXBI) machine.
Here goes the list and following are specific questions
T1010 DWBUA VAXBI-UNIBUS adapter (BI side)
T1022/1023 DRB32, VAXBI-DRB adapter and DR11-W adapter
T1031 KFBTA (AIE) BI RD Drive Controller
T1060 VAX 9000 PEM Module
T2020 XMI/NI controller
T2022/2023 KDM70 XMI-SI adapter pair
T2027 DEMFA XMI-FDDI controller
T2028-AA XMI-LSB adapter
T2029-AB XMI-SCSI adapter
T2036-AA KFSMA, XMI-DSSI adapter
T2080-YA CIXCD-AC XMI-CI adapter (for AXP and VAX 7k/10k)
The intriguing thing about this pile is that it's relatively
unusual hardware. I don't have this stuff yet and I don't get
it for free. If you want any of it, chime in and tell me what
you'd spend. I could make a bundle order that can give yet a
better basis for negotiation.
Detail:
T1010 DWBUA VAXBI-UNIBUS adapter (BI side)
- what cab-kit assembly is needed, is this something extremely
hard to find? Can you give a model number for the cab-kit so
I might find it somewhere?
- I might want that because I plan to have a UNIBUS cabinet
besides a VAX 11/780 in the near future. I could kind of
swap the Unibus between the two machines. And I could use
the UNIBUS frame buffer set that I might also get sometime.
T1022/1023 DRB32, VAXBI-DRB adapter and DR11-W adapter
T1031 KFBTA (AIE) BI RD Drive Controller
- what the heck are DRB bus and what are the accessories needed
to do anything useful with it?
- and what are RD drives? Old junk? Are those available?
How are they connected to the KFBTA?
T1060 VAX 9000 PEM Module
- there is actually a bunch of other 9000 modules. Anything
useful to do with this in a VAX 6000's BI bus?
T2020 XMI/NI controller
- is this an XMI ethernet controller? Can it be used in
an 6400 XMI bus? 6600? or only a 7000 and 10000?
T2022/2023 KDM70 XMI-SI adapter pair
- SI bus? Is this yet another disk/tape storage bus? Availability
of disks? Old or new? This isn't the same as SBI (11/780) or
SDI (KDB50) right?
T2027 DEMFA XMI-FDDI controller
- This should work on a 6400 XMI bus, right?
T2028-AA XMI-LSB adapter
- Laser bus? That's the 10000's bus, right? I assume that
would require a whole LSB backplane, power, etc. etc.,
not feasible with a VAX 6000.
T2029-AB XMI-SCSI adapter
- Just checking: are these -AA, -AB, etc. suffixes anything
that can make or break 6400 XMI compatibility?
T2036-AA KFSMA, XMI-DSSI adapter
- dito -AA -AB, etc. any issues there?
T2080-YA CIXCD-AC XMI-CI adapter (for AXP and VAX 7k/10k)
- dito. This sounds like a cool alternative for a faster
CI link than through the BI bus.
Your comments on any or all of the above are appreciated.
And let me know if your heart is longing for anything of
it and how much you would pay. (I don't make a profit from
this, I'm trying to get a good price on a bulk order.)
thanks,
-Gunther
--
Gunther Schadow, M.D., Ph.D. gschadow(a)regenstrief.org
Medical Information Scientist Regenstrief Institute for Health Care
Adjunct Assistant Professor Indiana University School of Medicine
tel:1(317)630-7960 http://aurora.regenstrief.org
Sridhar,
I would be interested in those tech docs. Got a S/36 5363 sitting at my
office.
Phil
-----Original Message-----
From: owner-classiccmp(a)classiccmp.org
[mailto:owner-classiccmp@classiccmp.org]On Behalf Of Absurdly Obtuse
Sent: Wednesday, October 03, 2001 5:55 PM
To: Michael L. Drew
Cc: 'classiccmp(a)classiccmp.org'
Subject: Re: IBM S/36 5363 Question
Nice find! Want technical docs?
Peace... Sridhar
On Wed, 3 Oct 2001, Michael L. Drew wrote:
> My $10.00 (not including packing and shipping... Ouch!!!)
> System 36-5363 arrived today!!
>
> It is much bigger than I thought!
>
> The case is built like a tank
>
> How do I get it open???
>
> I got the back cover off, no problem...
>
> There is no obvious way in.
>
> Any hints would be greatly appreciated.
>
> Mike
>
>
>
>
> --
>
>
============================================================================
===
>
> Michael L. Drew
> Drew Technologies, Inc.
> 41 Enterprise Drive
> Ann Arbor, MI 48103
> Phone: (734) 623-8080
> Fax: (734) 623-8082
>
============================================================================
===
>
>
>
The only ones i've seen are SK-net brand, of which I have two in my IBM
server 95s.
In a message dated 10/2/2001 10:17:01 PM Eastern Daylight Time,
vance(a)ikickass.org writes:
<< The problem with eBay though, is that many of the cards going through
there are SAS and unlabeled. That. and I've never seen an IBM FDDI/MC on
there.
Peace... Sridhar
On Tue, 2 Oct 2001, Gunther Schadow wrote:
> on ebay :-)
>
> yes, I've seen them scroll through recently. Several of them.
>
> -Gunther >>
> Hmmm...are there EPROM's in it, or ROMs? I built a PC
> compatible with a bare board and stuffed the chips and
> soldered it when I was broke in college. The BIOS it
> came with wasn't very PC compatible. So (and I'm not
> making any excuses for this..) I wrote a program in
> disk based GW-BASIC (I actually BOUGHT it) that looked
> like it did something when in reality it was writing
> 2048K ROM images of the BIOS and BASIC ROMS of a real
> IBM PC to floppy. I took it to an IBM store (IBM had
> "stores" then) and told the salesman that I wanted to
> know if my program would really run on an IBM PC/XT. I
> ran it, it "worked", I said, "thank you very much",
> went to work, blew the EPROMS, stuffed 'em in my
> motherboard, and then, my PC, although it had a wooden
> case and a power supply shielded with Erector Set
> parts, was really, really, definitely IBM PC
> compatible!!
Brilliant move!
Glen
0/0
> Hmmm...are there EPROM's in it, or ROMs? I built a PC
> compatible with a bare board and stuffed the chips and
> soldered it when I was broke in college. The BIOS it
> came with wasn't very PC compatible. So (and I'm not
> making any excuses for this..) I wrote a program in
> disk based GW-BASIC (I actually BOUGHT it) that looked
> like it did something when in reality it was writing
> 2048K ROM images of the BIOS and BASIC ROMS of a real
> IBM PC to floppy. I took it to an IBM store (IBM had
> "stores" then) and told the salesman that I wanted to
> know if my program would really run on an IBM PC/XT. I
> ran it, it "worked", I said, "thank you very much",
> went to work, blew the EPROMS, stuffed 'em in my
> motherboard, and then, my PC, although it had a wooden
> case and a power supply shielded with Erector Set
> parts, was really, really, definitely IBM PC
> compatible!!
Brilliant move!
Glen
0/0
Jan Koller wrote:
> Glen,
>> Why not display something understandable to a common user, such
>> as "no bootable device?"
> The same common user that needs their ports both labeled and color coded?
Jan --
Yes, the same user. Most of them know what "boot" means, whereas ROM and
BASIC are completely foreign to them.
Glen
0/0
Jan Koller wrote:
> Glen,
>> Why not display something understandable to a common user, such
>> as "no bootable device?"
> The same common user that needs their ports both labeled and color coded?
Jan --
Yes, the same user. Most of them know what "boot" means, whereas ROM and
BASIC are completely foreign to them.
Glen
0/0
Jan Koller wrote:
> Glen,
>> Why not display something understandable to a common user, such
>> as "no bootable device?"
> The same common user that needs their ports both labeled and color coded?
Jan --
Yes, the same user. Most of them know what "boot" means, whereas ROM and
BASIC are completely foreign to them.
Glen
0/0
On Oct 3, 13:54, Richard Erlacher wrote:
> e.g. th Alpha-Micro, which was
> reputed to be every bit competitive with the '11's. I don't know how
they
> compared in cost, however. The AM was "sort-of" S-100, in that it used
S-100
> memory, but I can't say whether it worked with other devices.
>
> The Alpha Micro was pretty sought-after among the lip-service, but I
never saw
> one in someone's possession.
I was offered one several years ago. I'm not sure of the configuration,
but the storage was 2 x 8" floppies and I think it was a lot cheaper than a
small PDP-11. Unfortunately, I didn't appreciate what I was looking at,
turned down the (free) offer, and apparently it ended up in a skip
(dumpster). Thank you for reminding me to kick myself :-)
--
Pete Peter Turnbull
Network Manager
University of York
Mr. Fox,
For information on the Philips minicomputers from the 1970's have a look at:
http://home.debitel.net/user/groener1/comp_045.htm#Serien
I am looking for a P857 computer myself.
If you would find one, please let me know.
Good luck.
Edward P. Woldendorp
7602 ALMELO
the Netherlands
phone: +310546-873134 or 873135
Anybody want or need any AIM65 stuff? Boards, keyboards, manuals but not many working printers or displays.
Also a new AIM65-40 40 column printer (not compatible with the 20col model)
mike
mhstein(a)usa.net
> > "No ROM BASIC" does not tell the user what happened. "No bootable
device
> > found" would be more helpful.
>
> Yes it does tell the user what happened. The system attempted to enter
> ROM BASIC, there is no ROM BASIC and thus the system was halted. As Hans
> said, INT 18h can be called from anywere, not just the bootstrap. Would
> 'No bootable device found' make sense if another program tried to call
> ROM BASIC, not as part of booting the system?
Tony, have you dealt with any typical personal computer users lately? I do
every day, and I can tell you that none of the ones I deal with -- and I
mean *none* -- know what a ROM is, or what BASIC is. "No ROM BASIC" tells
you, Tony Duell, what happened, but for the vast majority of users, it
doesn't mean a thing.
Glen
0/0
Does anyone have a system disk for a Hyperion that they could image and e-mail to me? I'd be most grateful.
Also, I have a second Hyperion for parts if anybody needs anything (Toronto area)
Thanks,
mike
mhstein(a)usa.net
> I just now copied them and they are available at:
>
> http://www.flummux.org/radio/
>
> I can hold them indefinitely (I control the server (486, so it's within
>the charter of this group 8-) and have plenty of disk space) but I would
>prefer they go someplace more appropriate than my digpile domain 8-)
Can you get pic 2,3 or 6 to open? I can't get them to work (your copy or
the originals) on either my Mac, or my winME machine.
If you can get them to open, can you either email them to me, or ftp them
to ftp.mythtech.net (drop them in the incoming directory... I already
have 1,4 and 5 there).
I would also be happy to permanently host them (although I don't know how
much more appropriate my domain is than yours... but either way). I can
also convert them to a single PDF if people want.
Thanks
-chris
<http://www.mythtech.net>
I remember a couple of months ago there was discussion on
the proper cable for a BA440 power supply (normal North
American three prong power cord but with a notch where it
plugs in to the power supply). Was there a consensus on
the designation (and any place in the US that sell them)?
--
Eric Dittman
dittman(a)dittman.net
Ok.. the May 85 Radio-Electronics pages have been moved.
The (or should I say A, since others are welcome to mirror them) page to
download them is:
<http://www.mythtech.net/armatron/>
There are 6 pages, you can DL them individually (approx 150k each JPEGs),
or you can download the single PDF of the pages (approx 5mb).
They can stay here until someone that owns the copyright to them yells at
me to take them down... or until further notice (which means, by
tomorrow, I will have forgotten they are on my site, and they will end up
being there pretty much forever).
If anyone wants the original TIFF files, let me know. There was no real
difference between the TIFF and the JPEG, except that the JPEG is about 4
times smaller. I have no plans on posting the TIFFs, but I will be
archiving them to CD if anyone decides they want them.
Thanks go out to Mike for taking the time to scan these, and work with me
to get a good copy of them.
-chris
<http://www.mythtech.net>
>Hmmm, is it me or is everyone else having problems with arm2.tif and
>arm3.tif?
>I was able to open arm6.tif though....
>
>Ram
Yes, there was something wrong with the images 2,3 and 6... but thanks to
Mike's infinite patience... I now have a complete set. The pages will be
available on my web site in JPEG format (cuts them from about 1.2mb tiffs
down to about 200k jpegs) and in a PDF "collection".
They should be available by the time you read this (or within a few
minutes after) at <http://www.mythtech.net/armatron/>
-chris
<http://www.mythtech.net>
>I am planning on converting the Radio Shack Armatron to run off the
>parallel port
>of a PeeCee but need the plans to do it. I found the following site
>that contains the conversion
>needed for an Atari at:
>
>http://www.bitsofthepast.com/atari/arm.html
>
>The May '85 Radio-Electronics has the necessary instructions, sooo I was
>
>wondering if someone would be kind enought to either scan or mail me the
>
>article.
I hate to sound like an AOL'er, but ME TOO! (that is, email me the
directions too)... I have never thought of doing this, but it certainly
would make my old armatron WAY more fun. (Humm... now I am going to have
to pull it out and see if I can hook it up to my Lego Mindstorm... toss a
remote control car body to the bottom, and I can terrorize my cat for
hours!)
-chris
<http://www.mythtech.net>
Our DECstation 3100 has been in a sad state recently. Both the monitor (that
old monochrome thing without a stand which was used with the VS2000 amongst
others) and the keyboard (LK201) had given up the gist (the monitor would just
make a flickery sound, without the CRT coming alive, the keyboard didn't blink
and the console would blink "??" when it reached test 3).
I plugged in a Nokia monitor, which worked, if you can live with the green
picture, and another LK201. That worked for a while, but when I managed to
boot it (NFS wasn't so cooperative this day), and reached X, the mouse just
stopped moving after a while. I rebooted it, and suddenly this keyboard had
died as well.
What the hell is going on? Is it possible to save the LK201s? We're running
short of DEC keyboards as it is, and we certainly don't need this.
--
En ligne avec Thor 2.6a.
If the designers of X-Windows built cars, there would be no fewer than five
steering wheels hidden about the cockpit, none of which followed the same
principles -- but you'd be able to shift gears with your car stereo. Useful
feature, that.
- Marus J. Ranum, Digital Equipment Corporation
I was able to see them yesterday but, now they are gone.
SteveRob
>From: "Glen Goodwin" <acme_ent(a)bellsouth.net>
>Reply-To: classiccmp(a)classiccmp.org
>To: <classiccmp(a)classiccmp.org>
>Subject: Re: Central Florida Junk Fest report.
>Date: Tue, 2 Oct 2001 23:40:16 -0400
>
>Hey Mike, I'm getting a 404 on all of these :>(
>
> > The pics didn't come out very well with alot of cc gear hiding in the
>shade,
> > but here they are:
> >
> > http://personal.lig.bellsouth.net/lig/d/o/dogas/Jf1.jpg
> > http://personal.lig.bellsouth.net/lig/d/o/dogas/Jf2.jpg
> > http://personal.lig.bellsouth.net/lig/d/o/dogas/Jf3.jpg
> >
> >
> > > ;)
> > > - Mike: dogas(a)bellsouth.net
>
_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp
Track the clock through the logic... there is a divide by 2 in there.
Also the 9080 250ns part was late in the game and hard to find.
If you want an 8080 that was really fast use a 8085-5 (5mhz)
or the later 80c85-6(6mhz). the latter was a nice part as it
was CMOS.
I still have a potload of 8080s and 8085s and my design favorite
for small systems is the 8085 over the Z80.
Allison
-----Original Message-----
From: Richard Erlacher <edick(a)idcomm.com>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Sunday, September 30, 2001 8:23 PM
Subject: Re: 8080 vs. 8080A
>Well, Allison, it appears you're right. The AMD 9080 was the one with
the 250ns
>clock (4 MHz) period, now that I've looked a couple of references.
Thanks for
>clearing that up.
>
>However, that doesn't explain what's going on in my iSBC8020-4's. I'll
have to
>figure that one out.
>
>Dick
>----- Original Message -----
>From: "ajp166" <ajp166(a)bellatlantic.net>
>To: <classiccmp(a)classiccmp.org>
>Sent: Sunday, September 30, 2001 5:12 PM
>Subject: Re: 8080 vs. 8080A
>
>
>> no, it was 2mhz.
>>
>> using 8224 the usual crystal was 18.435 (2.0483333*9).
>> there was a -1. -2 and -3 version of the part but the fastest was
3mhz.
>>
>> I used to sell upD8080AF for NEC and I had to know my competition.
>>
>> Allison
>>
>> -----Original Message-----
>> From: Richard Erlacher <edick(a)idcomm.com>
>> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
>> Date: Sunday, September 30, 2001 6:23 PM
>> Subject: Re: 8080 vs. 8080A
>>
>>
>> >BTW, the 8080 was a 2.5 MHz part, wasn't it? I've got a couple Intel
>> app-notes
>> >where they generate a baud-rate clock from 24.576 MHz and generate
the
>> CPU clock
>> >from that, at 2.4576 MHz for the CPU. That's on an i8080-2.
>> >
>> >Dick
>> >
>> >----- Original Message -----
>> >From: "ajp166" <ajp166(a)bellatlantic.net>
>> >To: <classiccmp(a)classiccmp.org>
>> >Sent: Sunday, September 30, 2001 2:31 PM
>> >Subject: Re: 8080 vs. 8080A
>> >
>> >
>> >> Wrong!
>> >>
>> >> The I8080A is AS fast as the i8080. the i8080A-1 is faster but not
>> twice
>> >> as the fastest 8080[A] was only 3mhz and hte standard part was
2mhz.
>> >>
>> >> Allison
>> >>
>> >> -----Original Message-----
>> >> From: John Galt <gmphillips(a)earthlink.net>
>> >> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
>> >> Date: Sunday, September 30, 2001 3:57 PM
>> >> Subject: Re: 8080 vs. 8080A
>> >>
>> >>
>> >> >"The i8080A is essentially twice as fast as the
>> >> > standard i8080 and COULD be used more easily with low-power logic
>> since
>> >> its
>> >> >demands aren't as stringent".
>> >> >
>> >> >Ok, that's a good start.
>> >> >
>> >> >But, I don't think "low power" TTL (transistor transistor logic)
had
>> >> >anything to do with the complexity of the code being executed on
the
>> >> chip.
>> >> >True? I had assumed
>> >> >that the references to the 8080 only being compatible
>> >> >with "low-power TTL" and the 8080A being compatible
>> >> >with "standard TTL" had something to do with the support chips
(Ram,
>> >> clock,
>> >> >etc) that could be used with the 8080 vs. the 8080A.
>> >> >
>> >> >Since I'm new to this mail list, let me explain why I would
>> >> >show up here and ask such a question to begin with.
>> >> >
>> >> >I'm a chip collector. I am trying to document the differences
>> between
>> >> the
>> >> >different early Intel microprocessors. Not worried about massive
>> >> detail,
>> >> >just the major differences (PMOS, vs. NMOS, vs.
>> >> >HMOS, clock speed, transistor count, etc).
>> >> >
>> >> >The only microprocessor that I don't have a good handle
>> >> >on is the 8080 and the difference between the 8080 and 8080A.
>> >> >
>> >> >I also know that the 8080 was introduced sometime
>> >> >around April 1974. I have not been able to find an
>> >> >introduction date for the 8080A. Was it introduced at
>> >> >the same time? Does anyone know?
>> >> >
>> >> >I also need an Intel C8080 or C8080-8 for my
>> >> >collection. If you have one, I want it. I have been looking
>> >> >for one for months and have not been able to find one.
>> >> >If you have either of these chips in good condition
>> >> >(no desoldered parts wanted), I'm offering 400.00
>> >> >for the C8080-8 and 500.00 for a C8080.
>> >> >
>> >> >If you need a replacement for the C8080 or C8080-8 you sell me,
I'll
>> >> GIVE
>> >> >you a D8080A free as part of the
>> >> >deal.
>> >> >
>> >> >----- Original Message -----
>> >> >From: "Richard Erlacher" <edick(a)idcomm.com>
>> >> >To: <classiccmp(a)classiccmp.org>
>> >> >Sent: Sunday, September 30, 2001 1:21 PM
>> >> >Subject: Re: 8080 vs. 8080A
>> >> >
>> >> >
>> >> >> This makes no sense at all, though it may be because I'm
>> >> misinterpreting
>> >> >the way
>> >> >> in which you've put it.
>> >> >>
>> >> >> I have Intel boards that come in versions with the i8080 and
also,
>> >> >> optionally,with the i8080A, and, aside from the clock frequency
and
>> >> memory
>> >> >> access times, they're identical. The i8080A is essentially
twice
>> as
>> >> fast
>> >> >as the
>> >> >> standard i8080 and COULD be used more easily with low-power
logic
>> >> since
>> >> >its
>> >> >> demands aren't as stringent.
>> >> >>
>> >> >> The i8080A will, AFAIK, replace the i8080 in all applications
>> without
>> >> ill
>> >> >> effects.
>> >> >>
>> >> >> BTW, please turn off "rich-text" mode in your email editor when
you
>> >> >compose
>> >> >> messages for this group, as some folks' mail readers can't
>> interpret
>> >> the
>> >> >> rich-text/HTML format.
>> >> >>
>> >> >> Dick
>> >> >> ++++++++++++++++++++++++++++++++++++++
>> >> >> ----- Original Message -----
>> >> >> From: John Galt
>> >> >> To: classiccmp(a)classiccmp.org
>> >> >> Sent: Sunday, September 30, 2001 10:17 AM
>> >> >> Subject: 8080 vs. 8080A
>> >> >>
>> >> >>
>> >> >> Can anyone here describe the technical differences between
>> >> >> an Intel 8080 and Intel 8080A CPU?
>> >> >>
>> >> >> The ONLY ref. I have been able to find seems to indicate that
there
>> >> was a
>> >> >bug in
>> >> >> the 8080 and as a result it would only work with low power TTL?
>> >> >>
>> >> >> The problem was fixed in the 8080A and it would work with
standard
>> >> TTL?
>> >> >>
>> >> >> Does this make sense to anyone?
>> >> >>
>> >> >> Could anyone put this into laymans terms for me?
>> >> >>
>> >> >> Thanks,
>> >> >>
>> >> >> George Phillips - gmphillips(a)earthlink.net
>> >> >>
>> >> >
>> >>
>> >>
>> >
>>
>>
>
>
Hello,
I just picked up a 9K 847S, upgraded to H50 with two SCSI-buses, one mux
panel, a few disks and 384MB of memory (hmmmmm...). I'm not sure on the
ten year rule as I'm relatively clueless regarding this machine. This is
my second PA-RISC machine and it seems refreshingly better than the 840.
A few questions:
a) Introduction date ?
b) Where can I get HP-UX 10.x cheaply :)? (ie. for free)
--
jht
QBASIC's sitting on my machine here at work (NT4), so I guess it's part of
the default NT installation. There's no reason for us to use QBASIC here,
it's too useful - we're mostly doing PL/SQL or MFC ;-)
-al
I believe that qbasic was included in some older nt and win9x
installations only as support for "edit"; i.e., you typed
"edit autoexec.bat" and the qbasic editor would be the
actual invoked program.
carlos.
At 05:52 PM 10/2/01 -0500, you wrote:
>Yay on NT4 Server, nay on NT2K Server.
>
>George
>
>On 2 Oct 2001 11:6:7 +0100, Iggy Drougge wrote:
>
>>Glen Goodwin skrev:
>>
>>>> Isn't QBASIC delivered even to this day with Windows systems? That's a
>>>much
>>>> nicer basic, and it features online help, which is great for kids.
>>
>>>No BASIC of any kind from Win95 on up.
>>
>>Since my only Windows machine is de-electrified right now, I can't test
that,
>>but I am certain that I've run QBASIC on it. Would anyone sitting at one try
>>that from a prompt?
>>
>>--
>>En ligne avec Thor 2.6a.
>>
>>"Real life is full of idiots, and tons of ads. I don't see how IRC is any
>>different, other than a lot more people want to have sex with you."
>> -- m3000
>>
>
>
>
>
--------------------------------------------------------------
Carlos E. Murillo-Sanchez carlos_murillo(a)nospammers.ieee.org
> Drop to DOS on any machine with a 5.25" drive you have access to. Type:
>
> format /u /s a:
Okay Sellam, I'll bite -- what's the /u parameter?
Glen
0/0
From: Chris <mythtech(a)Mac.com>
>I just did a search in win95 for basic (this is a fresh install of
win95,
>so no other software has been added)... and there are NO matches. Going
>to a command line and typing Qbasic give a "bad command or file name" as
>I would expect since find found nothing.
the standard install does not copy it to the disk. Check the CDrom as
it's there
in a seperate directory.
>WinME has the same results. I can't test 98 or NT 4 or 5 from home, so I
>can't say what is on them, but I would guess the same thing (nothing).
It's also on my NT4/server, Nt4/workstation, 98 and 98se none of which
install it automagically. it can be installed on W2000 from what I've
been
told but again it's a manual install.
Allison
I also have W95osr2 cdroms with Qbasic on them as old software.
My dos 5.0 kit has Qbasic and the 6.22full kit has it as well. the 6.22
upgrade does nto as it already part of the system (upgrade from dos5.0).
Allison
-----Original Message-----
From: Sipke de Wal <sipke(a)wxs.nl>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Tuesday, October 02, 2001 7:55 PM
Subject: Re: IBM ROM BASIC or lack thereof
>My CD-ROM is a special release for educational institutions and
>may have the PLUS CD incorporated !
>
>Sipke de Wal
>---------------------------------------------
>http://xgistor.ath.cx
>---------------------------------------------
>
>----- Original Message -----
>From: Russ Blakeman <rhblakeman(a)kih.net>
>To: <classiccmp(a)classiccmp.org>
>Sent: Wednesday, October 03, 2001 12:04 AM
>Subject: RE: IBM ROM BASIC or lack thereof
>
>
>> Not on my 95, 98 second edition or ME machines, even searched using
>> FIND...nope but it is on my Windows 3.11 machine, as it came with DOS
>> 6.22...
>>
>> -> -----Original Message-----
>> -> From: owner-classiccmp(a)classiccmp.org
>> -> [mailto:owner-classiccmp@classiccmp.org]On Behalf Of Iggy Drougge
>> -> Sent: Tuesday, October 02, 2001 12:00 AM
>> -> To: Glen Goodwin
>> -> Subject: Re: IBM ROM BASIC or lack thereof
>> ->
>> ->
>> -> Glen Goodwin skrev:
>> ->
>> -> >> Isn't QBASIC delivered even to this day with Windows systems?
That's a
>> -> >much
>> -> >> nicer basic, and it features online help, which is great for
kids.
>> ->
>> -> >No BASIC of any kind from Win95 on up.
>> ->
>> -> Since my only Windows machine is de-electrified right now, I
>> -> can't test that,
>> -> but I am certain that I've run QBASIC on it. Would anyone
>> -> sitting at one try
>> -> that from a prompt?
>> ->
>> -> --
>> -> En ligne avec Thor 2.6a.
>> ->
>> -> "Real life is full of idiots, and tons of ads. I don't see how IRC
is any
>> -> different, other than a lot more people want to have sex with you."
>> -> -- m3000
>> ->
>> ->
>>
>
>
> Isn't QBASIC delivered even to this day with Windows systems? That's a
much
> nicer basic, and it features online help, which is great for kids.
No BASIC of any kind from Win95 on up.
Glen
0/0
>>No BASIC of any kind from Win95 on up.
>
>Since my only Windows machine is de-electrified right now, I can't test that,
>but I am certain that I've run QBASIC on it. Would anyone sitting at one try
>that from a prompt?
I just did a search in win95 for basic (this is a fresh install of win95,
so no other software has been added)... and there are NO matches. Going
to a command line and typing Qbasic give a "bad command or file name" as
I would expect since find found nothing.
WinME has the same results. I can't test 98 or NT 4 or 5 from home, so I
can't say what is on them, but I would guess the same thing (nothing).
-chris
<http://www.mythtech.net>
I wrote:
> > This was the point to my original question: why would clone makers go
to
> > the trouble of displaying the message and then halting the system,
instead
> > of just *halting the system*? (Unless they were using stolen code.)
Just
> > doesn't quite make sense . . .
Hans replied:
> To tell the user what had happened?
> The code pointed to by Int 18H is responsible for printing that message
> and could be invoked from elsewhere than th BIOS boot sequence so it
> seems just user friendly to display some message if you are going to
> hang the system.
"No ROM BASIC" does not tell the user what happened. "No bootable device
found" would be more helpful.
> Of course today you would get a BSOD - much more informative ;-)
Yes, thank God for Bill Gates ;>)
Glen
0/0
So I dropped by the computer shop today and they had a Tandy 1800HD laptop
for $10. I grabbed it. It's in excellent condition. Unfortunately, someone
stole the power-supply... Any idea where I can get one? Also, were might I
find a scanned manual for this thing?
Blair
>/U (do a REAL format) is faster for you than
>/Q (DON'T do a real format, just write an empty directory) ??
>
>Would you care to post some measured times for how much faster it is?
Speed will be HIGHLY dependant on what size disk it is. A 360k disk
formats with /u fairly fast, and although it is STILL quicker to do /q,
it isn't a huge difference... however, when doing a 1.4 disk, it cam be
the difference between over a minute and under 10 seconds. /q is
basically the same as doing "del *.*", it doesn't reformat the disk at
all, it just rewrites the FAT so the disk thinks it is blank, the fastest
way to clear a disk is "format a: /q /u"... UNLESS there are only a few
items on it, then del *.* might edge it out
Also, with all this /u business... be careful when doing that on 5.25"
disks in a high density drive. If you put a DD disk in, and do format /u,
it will NOT warn you that it is going to attempt to format a DD disk as
HD. In MS DOS, when you format on a HD 5.25 drive, it automatically tries
to format HD... you need to specify the format size (or use /4) to format
360k... leaving off the /u will warn you that the format is different
then what you are about to try. Unfortuantly, leaving off the /u ALSO
fails to remap bad sectors, AND saves the unformat info adding a few more
seconds onto the disk format.
None of this warning business applies to 3.5" drives, they will detect
the HD vs DD disk, and format correctly... so with those it is safe to
always use /u if you want to.
-chris
<http://www.mythtech.net>
Hi,
I am planning on converting the Radio Shack Armatron to run off the
parallel port
of a PeeCee but need the plans to do it. I found the following site
that contains the conversion
needed for an Atari at:
http://www.bitsofthepast.com/atari/arm.html
The May '85 Radio-Electronics has the necessary instructions, sooo I was
wondering if someone would be kind enought to either scan or mail me the
article.
Thanks,
Ram
--
,,,,
/'^'\
( o o )
-oOOO--(_)--OOOo-------------------------------------
| Ram Meenakshisundaram |
| Senior Software Engineer |
| OpenLink Financial Inc |
| .oooO Phone: (516) 227-6600 x267 |
| ( ) Oooo. Email: rmeenaks(a)olf.com |
---\ (----( )--------------------------------------
\_) ) /
(_/
I've got a used ASCII Terminal, with detached keyboard
for whoever is the first to contact me to take it away.
(wife + messy basement = get rid of unused "junk").
I'm in the west end of Ottawa, Ontario, Canada.
If interested, contact me directly
via email: jimmiejimjim(a)hotmail.com
_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp
OK, I'm thinking of doing a wierd mod on a VT100, just how much room is
inside one of them? I need room for a 7 1/2" x 9" x 2 1/2" board (the
2 1/2" is thanks to the heatsink and RAM), and would also like to be able
to fit in a smallish 250W PS (3 1/2" x 5 1/2" x 6"), and a 3 1/2" HD.
I've got 2 or 3 VT100's, but they're so buried it's going to take a lot of
work to get to them so was hoping to get an idea if there is room first.
Basically I'm trying to build a PDP-10 into a VT100 by using an Intel
D810EMO MicroATX board.
Zane
--
| Zane H. Healy | UNIX Systems Administrator |
| healyzh(a)aracnet.com (primary) | OpenVMS Enthusiast |
| | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| PDP-10 Emulation and Zane's Computer Museum. |
| http://www.aracnet.com/~healyzh/ |
! From: Joe [mailto:rigdonj@intellistar.net]
!
! At 10:33 AM 9/28/01 -0400, you wrote:
! >Hmmm, is there going to be one up here around Connecticut sometime?
!
! Sure, if you'll organize it.
!
! Joe
!
Okay then, what's involved with one of these festivals? Can someone who
organized one of the other fests e-mail me with the info?
--- David A Woyciesjes
--- C & IS Support Specialist
--- Yale University Press
--- mailto:david.woyciesjes@yale.edu
--- (203) 432-0953
--- ICQ # - 905818
>LOGO
YEAH... that was the language (logo, topal... hey this goes back to the
4th grade, I am lucky I remembered playing with it at all) :-)
-chris
<http://www.mythtech.net>
Hans....
I may be wrong in my explanation to the following question you posed but I
will give it a shot.....You said:
I don't know any reason why the system has
to be keyed, I always assumed the US development of keyed plugs
was triggered by old DC systems (since in DC Eq. it is necersarry
to know the orientation), but not a new addition. Strange, we
dropped all orientationwhen switching to AC (with Protective
Ground). Could anyone give give a reason why the system has
to be keyed _IF_ a Protective Ground is included (other than
define the Protective Ground pin)
If you hook an scope up circuit such as a TV and hook the ground probe up to
signal ground but you have the plug reversed the circuit will short out and
you will blow the device you are testing. That is because you just provided
a current path to frame ground for the signal which you thought was signal
ground. TV repairman who have used scopes have done this more than once.
Tony Niemann
2606 Merriwood Avenue
Louisville Kentucky 40299
tniemann(a)msn.com
502-267-9233
> /u = Unconditional, it will do a real format, as opposed to
> quick format
>
/U - unconditional, prevents checking of sectors for read errors
before formatting them. This is the only way to format unformatted
or non MSDOS disks or to overwrite any blocks on MSDOS disks
that are marked as bad.
Lee.
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Just in case:
The default password at the "#" prompt is access
The default privileged password is system
Otherwise, I'll see if I have
the manual around somewhere to
dig out the set-to-factory-defaults
sequence.
Antonio
> -----Original Message-----
> From: Absurdly Obtuse [mailto:vance@ikickass.org]
> Sent: Tuesday, October 02, 2001 6:34 AM
> To: Classic Computers Mailing List
> Subject: DECserver 700
>
>
>
> Hey there. I was wondering if someone could help me break into the
> privileged mode on my DECserver 700 without the password. Do
> I have to
> remove the RAM, the battery, or something? Thanks.
>
> Peace... Sridhar
>
>
>
Hey there. I was wondering if someone could help me break into the
privileged mode on my DECserver 700 without the password. Do I have to
remove the RAM, the battery, or something? Thanks.
Peace... Sridhar
>...and stuff that I couldn't even give away and had to pack back up at the
>end of the half day:
>
> Robbie Robot
Which Robbie the Robot would this be? I am thinking of that thing used by
grade school kids to learn about programming (forget the language name...
Topal?). The idea was to write simple programs that got the robot to move
around. Is it THAT Robbie?
> Oscilliscope
A working Oscilliscope? I have been wanting to lay my hands on one for
some time... just for play/learning, so I haven't wanted to spend any
real money on one (but have been hoping to find one at a garage sale or
similar). What would you want for it? (And depending on the Robbie, what
about it?)
-chris
<http://www.mythtech.net>
> It was small. Myself and 4 other people came with loads of classic
computers
> and I had a fun morning with the similarly afflicted. Nice seeing y'all!
>
> I scored a tonne of stuff including:
[snip]
> While there, I was able to dump^h^h^h^htrade^h^h^h^h^hfind new homes for:
[snip]
> ...and stuff that I couldn't even give away and had to pack back up at
the
> end of the half day:
>
> a few Olympia ETX-II computers
> Amiga 2000
> Robbie Robot
> Burroghs Calculator
[snip]
&(&%$@#$#^%$!!! You had a Burroughs calculator and you didn't tell me
about it?
> There were several Grid, Apple, IBM, HP computers, a few AT&T 3B2s, and
> others, books, software, and test gear as well that I wasn't able to
bring
> home.
>
> I took a few digital pics and will post them shortly.
Cool! Keep us posted!
> Thanks for hosting it Glen and let's do this again. Got new toys to play
> with. Later!
Thanks for being there!
Glen
0/0
The Alpha was started by DEC in 1988 as a replacement for the VAX, it
extends the address space to 64 bits and switches from a CISC architecture
to a RISC architecture.
I've got a copy the Alpha Architecture Reference Manual (AARM) and the
Alpha Architecture Handbook (AAH) which combined give you everything you
need to know about the Alpha.
They're extras.
I'd like to offer them in trade to anyone who has EITHER:
KA640 Technical Manual
KA680 Technical Manual
Also published by Digital.
--Chuck
I have recently acquired a Canon BX-1 Desktop Computer.
It's a self-contained unit incorporating an alpha
keyboard, a single-line alpha display, thermal printer
and 5.25" disk drive. From the markings on the keyboard
it seems to be programmed in some dialect of Basic.
Does anyone know where I can find any information
about this machine? A web search turned up exactly
one page mentioning it, which didn't tell me much.
It didn't work at all when I first switched it on.
I found and repaired a fault in the power supply, but
that doesn't seem to be the end of its problems.
At switch-on, it beeps, and then starts flashing a
row of up-arrows in the display. There is *almost*
no response from the keyboard, except that after
about 20 or so keystrokes it flashes something like
KEYBOARD OV'FLO very briefly and then goes back to
the up-arrows.
Is there anyone out there with any experience with one
of these things who can tell me whether it's trying
to signal some sort of error condition with the up-
arrows, or is it just totally insane?
Thanks for any help,
Greg Ewing, Computer Science Dept, +--------------------------------------+
University of Canterbury, | A citizen of NewZealandCorp, a |
Christchurch, New Zealand | wholly-owned subsidiary of USA Inc. |
greg(a)cosc.canterbury.ac.nz +--------------------------------------+
Hi,
Please understand I dont collect for economic gain. I'd have to
hit the big one to pay back for some of the machines I built
new back when. I collect to have the machine I could not afford
back when but wanted to experiment with. So happens along
the way some of them became interesting as so called rare
items. To me my Altair was a relly poor machine and the NorthStar
I replaced it with was far superior, yet the first is collectable even
though it was truly a peice of junk compared to even the IMSAI.
Anywho I'll look when time permits.
Allison
-----Original Message-----
From: John Galt <gmphillips(a)earthlink.net>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Monday, October 01, 2001 9:15 PM
Subject: Re: Altair 8800a on EBAY
>I see where you are coming from, but given the recent return of some of
my
>"real" investments, it's hard to imagine
>this computer being any worse;)
>
>Thanks,
>
>George Phillips
>
>
>
>Well, my "real" investments have not been doing
>----- Original Message -----
>From: "Louis Schulman" <louiss(a)gate.net>
>To: <classiccmp(a)classiccmp.org>
>Sent: Monday, October 01, 2001 7:34 PM
>Subject: Re: Altair 8800a on EBAY
>
>
>> On Mon, 1 Oct 2001 18:40:02 -0400, John Galt wrote:
>>
>> #I have been considering buying one of these machines as an
investment.
>> #While I am a computer programmer by trade, I have no clue how to
operate
>> #or program one of these things which really does not matter since I
would
>> #be buying it as an investment.
>>
>> Well, if you are considering this as an investment, I would also
consider
>rubies, pork belly futures, penny
>> stocks, and going to Las Vegas. You could call this an investment,
but it
>would really be nothing but a crap
>> shoot. If we are seriously talking investments, this isn't it.
>>
>> There is no basis to assume anything about future value. Other forms
of
>antique electronics have not
>> become that valuable. You can still buy a working Atwater-Kent radio
for
>a reasonable price.
>>
>> Anyone who follows eBay can tell you that prices go up and down. Most
>have gone down in the last year.
>> You can barely give away a Kaypro.
>>
>> So, buy it to enjoy it. Otherwise, I'd look to real investments to
make
>money.
>>
>> JMO
>>
>> Louis
>>
>
On Oct 1, 2:01, Tony Duell wrote:
> > Sure you're not thinking of a Z80? The standard speed for the original
Z80
> > parts was 2.5MHz (4MHz for Z80A and 6MHz for Z80H).
>
> Just a minor correction. I believe the Z80B is 6MHz and the Z80H 8MHz.
SGS-Thomson list them as 6MHz and 8MHz now, but IIRC the Z80H was
originally 6MHz. I could be mistaken, of course.
--
Pete Peter Turnbull
Network Manager
University of York
On Oct 1, 21:31, Tony Duell wrote:
> > I've been thinking about SZ Spectrums all the time.
> > Oh well, I might just ask anyway, since I've opened it up...
> > What is that chip next to the Z80? It's labelled PCF1306P.
>
> If it's another 40 pin chip, then that's the custom ULA chip that
> includes most of the glue logic.
If it's a 28-pin chip it's the ROM, a 23128, IC5. The ULA is the other
40-pin chip, IC1, near the modulator. It may have different numbers
depending on the revision. There's more than one ROM version as well.
> > And why is there a switch glued on top of the Z80 with wires going to
the
> > character ROM? Since it's a localised character ROM piggybacked on top
of=
> > the
> > one soldered to the motherboard, could it be for switching charsets?
>
> Does the Spectrum really have a separate character generator ROM. Doesn't
> sound right to me...
It's not a character generator, it's just code. The screen memory is part
of the main DRAM and accessed directly by the ULA to drive the video. I
imagine the switch is to select different code versions.
The thing I like most about the Spectrum service manual (apart from the
inclusion of a proper schematic and other diagrams) is the fault-finding
list. Most such lists begin with mundane things like checking the fuse.
The Spectrum begins with:
"TV appears dead. Smoke appears" and describes additional symptoms as
"TR4 shorted. TR4 blows again".
--
Pete Peter Turnbull
Network Manager
University of York
Hi all
If anyone is interested I have some rolls of paper tape available for
shipping cost, if anyone has a good use for them (i.e. anyone has a punch
in need of paper)
Must be rather standard, where used in a Telex, but due to my ignorance in
tape I will try to describe as precisely as possible.
characteristics:
Tape width 11/16" (ca 17.9 mm)
tape length: unknown (should I unroll one of them ?)
color (white-ish)
Rolls diameter abt 7"" (18 cm)
The "hole" of the rolls (about 2" or 5 cm in diameter) has a "square wave"
profile to be better mounted.
Anyone interested?
Only drawback: I am in Italy, shipping will not be cheap...
ciao
Francesco
From: Carlos Murillo <cmurillo(a)emtelsa.multi.net.co>
>At 11:07 PM 9/30/01 -0600, you wrote:
>The
>>8085, at least, doesn't require three supplies. I don't know why they
wasted
>>all those pins on things like the pseudo-serial I/O and all those
interrupts.
>>Hardly anyone ever figured out how to use them well. It would have
been more
>>sensible to put the 8 address lines there and save the external latch
and the
>>strobe for it.
>
>Those irq's are exactly why I liked the 8085. Extremely simple
>to use. Appropriate for early embedded stuff.
that is the exact reason why the 8085 was successful. As to the comment
about the SIO/SID pins they were used by the TU58 for serial data and
were
very hand for when a few bits of IO were needed for simple things.
Allison