My wife has made the mistake of asking me what I wanted for my birthday.
Most of the suggestions I could make she wouldn't be able to understand
or find. This led me onto a thought process about the ideal "computer
play area".
Insulated 20' X 20' room
one wall entirely covered in shelving
raised floor
extreme airconditioning
oversized chair with U-shaped table for work area
power strips everywhere
tools for anything
phone to call and order more "stuff"
refrig for food and drink
no need to sleep
Enough money to buy any classic computer I desired and no interruptions
for work or chores.
These were the last thoughts I had as I drifted off to sleep. Maybe
I'll work on this dream a little more tonight.
I've heard that some prisoners develop an alternate world with
activities that keep them sane.
Mike
Does anybody have an Altair 8800b that they'd be willing to disassemble
and scan the faceplate? That's all :-) Or maybe somebody has already done
this? I'd like to find a nice high resolution scan of the 8800b front panel
if I can.
Thanks,
Bob Armstrong
Hi,
I have a small issue with printing out the ASCII char set, from $20 to $7E inclusive.
The 8251 initialisation is okay 'cos I ran a small program to print a single char to the
TTY and it worked fine. So, I thought I'd expand on this to transmit the printable ASCII
char set to the TTY (actually, Hyperterm). However, it jusat transmits spaces. I've
tried a few variations and it never prints the chars properly.
I'm figuring that there is a problem with my logic, but as I don't have a SC/MP programming
manual and I can't see the forest due to the trees, I'm hoping someone here on this list
with some SC/MP programming knowledge maybe able to offer some assistance.
The P1 register is pointing to the 8251 data port, and 1(1) points it to the control/status port.
ktest:
ldi $20 ;First char is ASCII 'space'
kt1:
xae ;temp save in E-reg/exchange the A and E regs
kt2:
ld 1(1) ;get UART status
ani $01 ;Tx Ready?
jz kt2 ;No, keep checking
lde ;Yes, get char
st (1) ;Tx the char
scl ;carry = 1
adi $00 ;add 0 + carry
xae ;save to E reg
lde ;move back to A reg
xri $7f ;gone too far?
jz ktest ;yes, start at SPACE again
jmp kt1 ;no, print it
Basically, I load the A reg with ASCII $20 (SPACE) and save it to the E reg.
Then I check the 8251 TX Ready flag and when ready I get the ASCII char from the
E reg and transmit it. The char is still in the A reg after the transmission, so I set
the carry bit and add $00 (ie incrementing the A reg). I then save this value in the
E reg and then load it back to the A reg - thereby both A and E regs have the same
value. I then check if I have hit the end by destroying the A reg with the XRI instruction.
If I haven't hit the end ($7F) yet, I go back to "kt1", whcih relaods the A reg with the
char and then it goes on to print this char. If it's at the end then it goes back to "ktest"
to start back at ASCII $20 and does it over again.
I've done this heaps of time with the 8080 processors and don't know why it's not doing
it with the SC/MP.
Also, I have some SC/MP listings about and one of them has "LD @0(P2)" instruction.
>From what I know, and this maybe totally wrong, the "@" is an auto-increment/auto-
decrement bit and you must specify the displacement for the inc/dec. If this is the case,
then what does the "0" that immediately follows the "@" do? I would expect to see a
value other than "0" to ensure the P2 register is inc/dec by the appropriate amount.
Please, old SC/MP dudes, any help would be greatly appreciated.
river
I might have asked this on here before a while back.....
But does anyone on here have any dssi-->hsd cables. I've got a storage
rack which has the potential to be 12x9gb scsi storage for my
vaxcluster. But I have the wrong cables. The cables I have go between
(I think) 2 hsd devices. I need a couple of cables to connect to a
4000, can anyone help.
Thanks
Dan
It got dropped off this afternoon -- Now I actually have to learn about the
durned thing... ;-)
It's SCSI (of course) with a 2G hard drive & CD-ROM reader ( I have a 2x
burner that may work well in it...) -- it has an S3-Virge based VGA card
with what appears to be 2 outputs; it's weird as it seems to be a 2-piece
card with one interface on each card, and each card plugging into 1/2 of a
Zorro slot (At least that's what I assume they are...) and the cards have a
small bridge-cable between them. It might be a CyberVision 64/3D based on
the description of that board, but I'm not sure, as it has no picture.
It's got the stock A3640 processor card, but I do not know the speed of the
CPU as it's got a heatsink on it -- I'll have to spark 'er up when I get a
chance, but that may not be for a couple of weeks or so...
All the RAM slots are full, so it would prolly have 16Meg onboard (I'm
guessing) - but no extra ZorroIII boards for memory...
It also seems to have some onboard video with a DF?23P but no monitor or
anything - I'm assuming they did not use that video port. Other than the
VGA card, it seems stock or nearly so - most slots are empty, it does not
have a network card or modem...
... And Holymygoodness, the sucker's not even ontopic! It was made by
"QuikPak Corp." and was made in January of '98!!! :-O
So, if you're gonna whack me on the 10-year rule, just unread this message
back to the beginning and forget you opened it. ;-)
Laterz,
Roger "Merch" Merchberger
--
Roger "Merch" Merchberger | "Bugs of a feather flock together."
sysadmin, Iceberg Computers | Russell Nelson
zmerch at 30below.com |
>From: "Jay West" <jwest at classiccmp.org>
>
>Eric wrote...
>> Does that software do some magic that can't be done with cat, cp, or dd?
>Nope, not at all.
>
>Was just looking for something more high level, and perhaps something that
>would read the data into a file, and let you edit it with something akin to
>a hex editor, then punch back out, etc. I figured there was already apps to
>do this... but in a pinch I have done just what you said.
>
>Jay
>
>
>
Hi Jay
In DOS, I use XTREE. It has a HEX edit mode. It doesn't
allow inserting, only replacing.
Dwight
>From: "Eric Smith" <eric at brouhaha.com>
>
>Dwight wrote:
>> I just saw someone auctioning a motorola
>> MC4004. I suspect that some will think it is
>> an Intel 4004 but I guess they'll soon
>> find out that it is just a simple cmos part.
>
>Even if they did expect a simple CMOS part, they'll still be
>disappointed, because the MC4004 is a TTL part!
>
>Motorola had a 4000 series of TTL parts before the SN7400 series
>became established. So when they introduced their equivalent
>of the RCA CD4000 series CMOS, they called it the MC14000 series.
>
>I can't find any reference to a CD4004 at the moment, but if there
>was one, and Motorola made an equivalent, they would have called it
>an MC14004.
>
>I've seen this problem occur more often when someone wants a CD4024
>and gets an MC4024, or vice versa. The former is seven stage binary
>counter, but the latter is a dual VCO.
>
>Eric
>
>
Yep, my error. I forgot the 14xxx as both you and William
pointed out.
Dwight
How about using a later version of DOS, and having it masquerade
as 3.3 if need be? The version being reported to a program by the
OS can be changed on an individual program basis for compatibility
purpose, so you might remove the 512 file limit without too much
hassles. I beleive MS DOS 5 and up have this facility. I certainly
remember using it for some AT&T STARLAN drivers way back...
Michel Adam
micheladam at theedge dot ca
----- Original Message -----
From: Vintage Computer Festival <vcf at siconic.com>
Date: Tuesday, March 29, 2005 8:22 am
Subject: Re: Obscure DOS question
> On Mon, 28 Mar 2005, Jim Leonard wrote:
>
> > Vintage Computer Festival wrote:
> > > MS-DOS 3.3 has a limit of 512 entries in the root directory.
> I have a
> > > need to put more than this.
> >
> > I seem to remember that the limit is actually 224.
>
> It's definitely 512 on DOS 3.3.
>
> > > Another question:
> > >
> > > When using the SUBST command in MS-DOS, you cannot aparently
> substitute> > the C: drive. I seem to recall that MS-DOS 6.0
> allowed this, although I
> > > might be confusing that with the ability of LANtastic to
> redirect the C:
> > > drive to a network drive.
> >
> > Checking 6.22 right here... works fine (I did "subst d: c:\").
> So yes,
> > you can.
>
> Hmm, cool.
>
> > > At any rate, what I'm trying to do is overcome the limit of
> 512 file
> > > entries in an MS-DOS 3.3 root directory.
> >
> > SUBST won't help you do this unless you don't use a floppy at
> all, like:
> >
> > subst a: c:\temp
> >
> > ...which works fine.
>
> I'm not using floppies at all. This is with hard disks.
>
> > My question is: Why?
>
> I'm restoring files from VHS backup tapes. The files were all
> originallystored and backed up from the root directory. On the
> tapes I used to test
> my process, none had more than 512 files archived. The backup
> softwareonly restores *to the same exact drive and path* that the
> files were
> archived from (in this case C:\). I'm running into some tapes
> that have
> more than 512 files backed up frm the root directory. These were done
> back in the 1980s. I can't figure out how they did it, but there they
> are.
>
> Once a backup is made, you cannot add to the backup, so that's not how
> they did it.
>
> Anyway, what I am trying to do so that we don't have to make two
> runs on
> each tape (each tape takes 2 hours to dump) is to re-map the C:
> drive to a
> directory so that we can overcome the 512 entry limit.
>
> --
>
> Sellam Ismail Vintage
> Computer Festival
> -------------------------------------------------------------------
> -----------
> International Man of Intrigue and Danger
> http://www.vintage.org
> [ Old computing resources for business || Buy/Sell/Trade Vintage
> Computers ]
> [ and academia at www.VintageTech.com || at
> http://marketplace.vintage.org ]
>
>
>
Hi all:
I just got an old //e with a Sup'R'Mod II RF modulator - I hooked it up as
expected to the TV (my 3 year old loves Moon Patrol in mono, so I figured
he'll love it more in color ;) but no joy - anyone out there got docs for
this? A scan would be lovely, mail would be fine and compensated. Let me
know, thx!
Regards,
Gord
In 1982, Radio Shack sold it for $2495 + tax. There are many things that it can't do that more modern computers will, but it will do word processing, database, spreadsheet, communication, educational programs, games, etc, but not the internet.
>
> From: Gene Ehrich <gehrich at tampabay.rr.com>
> Date: 2005/03/28 Mon PM 02:36:33 EST
> To: cctalk at classiccmp.org
> Subject: TRS-80 Model III ???????
>
> I have the opportunity to purchase a TRS-80 Model III computer. It looks
> very good, has two 5-1/4" floppies and (she says) worked the last time it
> was turned on.
>
> She is asking $50.
>
> Is that a fair price?
>
> What should it be worth?
>
>
>> Erm, no the serial/parallel conversion isn't common to both ports
>> on the chip.
>
>Hmm... curious. I'd downloaded the datasheet for the chip and it wasn't
>clear either way so figured I'd try the inverter trick.
>
>> This implies that some buffer chip that feeds to 8530 is
>> faulty.
>
>If they are totally seperate channels (no common internal buffering
>first, say) then yep, it looks that way. There's no buffers immediately
>by the serial logic, so I'll look further afield.
Even though there is (obviously) separate parallel/serial shift registers
inside the chip for each channel, I am assuming that the parallel data bus
enters the chip through only one set of pins - it is entirely possible that
the input gate, or some internal buffer common to both channels has failed.
An easy test would be to trigger on chip select, scope the affected data
bit on the bus inputs, and write patterns to the chip with the affected
bit in both hign and low positions - it should be very easy to determine if
the data bit is making it to the chip or not. If yes, replace the device,
if no, move to the next upstream component and repeat the test (all the while
keeping triggering on the device chip select). It should be a very easy matter
to identify the defective device in this fashion - no need to remove anything
other than whatever device is defective.
Even if you don't have an extender board, it is far easier to tack a lead
on to points you want to test than to be removing and replacing entire devices
in the hope of being lucky. -- Just MHO.
Regards,
Dave
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Collector of vintage computing equipment:
http://www.parse.com/~ddunfield/museum/index.html
Can anyone recommend some Classic Computer related things to do near
Bristol UK? I'm flying in from Australia in early April for some
training but I'll have at least one weekend to kill so any suggestions
of things to see near Bristol (I'll be without car which will be an
interestingly enough concept in itself!).
At the risk of upsetting the OT Gods, if anyone in the UK can recommend
a cheapish, reliable ISP that I can dial into during the stay, a
personal e-mail with some detail would be appreciated - the company
approved hotels don't have broadband available.
Huw Davies | e-mail: Huw.Davies at kerberos.davies.net.au
Melbourne | "If soccer was meant to be played in the
Australia | air, the sky would be painted green"
>From: "Bill Girnius" <thedm at sunflower.com>
>
>It's not entirely out of the question, after all, how many of you have the
>knowledge of metalurgy to make any metal tool from say... the Bronze age, or
>Iron, or make gun powder, sure you know what's in it, but can you obtain the
>raw materials, and build the contraption that they used to make it?
Let me see, volcanic vent for the yellow stuff. Fireplace
for the black stuff.
Need some horses and some soil with a high potassium content
for the white stuff.
Nothing real difficult. I think in a pinch ( with my car ) I
could find these things.
Still, it is true that as technology gets more complicated,
it takes quite a few people with knowledge in specific areas
to create the complete item.
Dwight
Some time ago, I sent the following message to the
list regarding a collection of Byte Magazines that I
was considering getting rid of.
A couple of people did express interest in receiving
some of them but I didn't pursue the matter at the
time due to workload. However, I'd now like to clear
my shelves so if you are interested could you please
let me know ...
See below for a list of the copies available.
Best regards,
Roger
--- Roger Bisson <roger161uk at yahoo.co.uk> wrote:
> Date: Sat, 22 Nov 2003 11:52:16 +0000 (GMT)
> From: Roger Bisson <roger161uk at yahoo.co.uk>
> Subject: Byte Magazines
> To: cctalk at classiccmp.org
>
> I have the following issues of Byte Magazine.
>
> Unfortunately, they take up a fair amount of space
> on
> my office shelves and, as a result, I am
> contemplating
> getting rid of them: despite them containing loads
> of
> good information, I just don't have time for it
> anymore :-(
>
> Anyway, individual copies are available if anybody
> has
> a collection with missing copies and, I am happy to
> send larger numbers of copies to anybody interested
> in
> them, the only provision is that postage and packing
> must be paid, at cost (or thereabouts), by the
> receiver.
>
> If I receive numerous contacts for specific copies
> of
> magazines, or for specific series I may place the
> magazine or series on eBay or another auction site
> as
> a means to resolving the contention, proceeds going
> to
> a local old folks home.
>
> All are in good condition, although clearly some are
> in better condition than others. I herewith
> enumerate
> all copies, as I do not have a complete set -
> certain
> months/years are missing.
>
> January 1988
> December 1989
> May 1989
> September 1989
> February 1990
> March 1990
> April 1990
> June 1990
> January 1991
> April 1991
> July-December 1991
> January-November 1992
> January-December 1993 (except February, July and
> October)
> January-December 1994
> January-December 1995 (except for August)
> January-December 1996
> February-December 1997
> January-April 1998
> July 1998
>
> Best regards,
>
> Roger
>
>
________________________________________________________________________
> Want to chat instantly with your online friends?
> Get the FREE Yahoo!
> Messenger http://mail.messenger.yahoo.co.uk
>
Send instant messages to your online friends http://uk.messenger.yahoo.com
I have two boot format QIC-24 tapes with SunOS 4.1.1 Sun-4c SUNBIN and
OpenWindows version 2 on them per the tape labels. They are dated Jan 15,
1991 and I wanted to know what machines can I load and run this software on?
Thanks John
Hello list. I signed up and did the confirmation but did not yet receive
a join msg. I presume the moderator will have to approve this msg.
My first exposure to computers was using an HP TSB system. I'm
interested in at least trying to get this going in an emulator. I
started a wiki page on my progress:
http://rikers.org/wiki/FirstComputer
Seems most folks used 2000A on a dual cpu 2100S setup with dial in
terminals.
Our setup was not like this. The computer room had a 3 terminals hooked
up to an HP-2114 series machine. I'm not sure about which model, but the
front panel looked just like what I see in online pictures like:
http://d116.com/vcf/east/1.0/hp2114a.jpg
There were 2 crt terminals that each had 5k of working space. I seem to
recall that the card reader and teletype had 2k or 3k each. I'm not sure
if that was bytes or words.
Perhaps it could have been an hp-2114c running ACCESS 2000E?
I saw a post about the manual being available:
http://www.classiccmp.org/mailman/htdig/cctech/2004-July/032447.html
and the the E series system works:
http://www.classiccmp.org/mailman/htdig/cctech/2003-November/022100.html
Can someone hook me up with the pieces I need? I'm currently running
SIMH with the hpbasic (basic1.abs) image. There are things that are
missing like "DIM A$[100]" does not work on that version.
On our setup with the single 2114 box, we did not have to login.
Everyone shared the same disk storage area. I don't recall anyone having
a username at all. there were just the 4 (2 crt, tty, and card reader)
terminals. I recall folks kept forgetting to clear the current program
before typing in a new one and then getting a mix of two programs. I
don't recall the commands, but it seems to me you could be on a crt and
tell the system to read from the card reader, then run a stack of cards
and the program would be loaded into your memory intead of just being
run and output to the printer.
I do recall that stored files that started with an "!" were hidden from
listings. I think there were 2 disks. One that was removeable and one
that was not. They were locked in the cabinet and never removed.
On another topic, since BZFlag is now over 10 years old, Does that make
it Vintage? ;-) Are all you SGI folks using it? I have an old Indy here
(IP22, 8bit) which I've been meaning to get it running on, but I'm
missing OS CDs, compilers and such. If anyone can help out, that would
be nice. ;-)
--
Tim Riker - http://rikers.org/ - TimR at Debian.org
Embedded Linux Technologist
BZFlag maintainer - http://BZFlag.org/ - for fun!
Hi
I just saw someone auctioning a motorola
MC4004. I suspect that some will think it is
an Intel 4004 but I guess they'll soon
find out that it is just a simple cmos part.
Dwight
In a message dated 3/28/2005 3:49:52 PM Eastern Standard Time,
classiccmp at ultra-gonzos.de writes:
I recently aquired a Bell and Howell IDB 2000 system with three
workstations.
Sounds interesting. I work at B+H (now Bowe Bell + Howell) and never heard of
it. I'll ask around.
--
I am not willing to give up my liberties for the false promise of 'security'
or, in other words, go check out www.bordc.org
> >I've got photos of the board at
> >http://decodesystems.com/help-wanted/bubble-memory-board.html
> >
> >Does anyone have any documentation and/or drivers for this board?
In your help wanted section, the Executone cards. Are you aware that
these are a part of a phone system?
Hi folks,
I recently aquired a Bell and Howell IDB 2000 system with three
workstations. The boot/data CDROMs (9) came with it. It seems that it is
an early network computing system. The computing power is in the
workstations, but they do not have any drives. They have to boot from
the fileserver. The fileserver starts up but the workstations won't
boot. I hooked up a laptop with a sniffer software into the Bell and
Howell network (standard Ethernet). The workstation sends a kind of
request (propietary, not even TCP/IP) but does not get a reply. I hooked
up a serial terminal to the console of the server and got a menu system.
The interesting menus (system administration, configuration etc.) are
protected with a password. The password has to be standard because the
server boots from a pressed cdrom.
Does anybody have expieriences with these computers?
p.s. One of the worksations has the label Siemens EPC 2000, but looks
the same as the Bell + Howell.
best regards
Flori
sounds great. Let me know.
Thanks.
best regards, Steve Thatcher
-----Original Message-----
From: quapla at xs4all.nl
Sent: Mar 28, 2005 11:53 AM
To: cctalk at classiccmp.org
Subject: Votrax 'Type 'N Talk' PSU
Available for $5 + shipping, a Votrax 'Type 'N Talk' PSU (120V/60Hz/50W).
PSU has a DIN style 5 prong audio plug for the unit, and is in good shape.
If interested, contact me directly
Ed
Available for $5 + shipping, a Votrax 'Type 'N Talk' PSU (120V/60Hz/50W).
PSU has a DIN style 5 prong audio plug for the unit, and is in good shape.
If interested, contact me directly
Ed
At the Northrop-Grumman (nee TRW) swap meet yesterday
I bought what appears to be an 8-bit ISA bubble memory card.
It's labeled as a circuit lab UL-82094.
I've got photos of the board at
http://decodesystems.com/help-wanted/bubble-memory-board.html
Does anyone have any documentation and/or drivers for this board?
Cheers,
Dan
The only thing I remember about these ancient boxes is that they
used UHF Channel 33. If you're hooked up to VHF Channel 3 or 4 you
won't see anything...
-Charles
On Sun, 27 Mar 2005 21:00:49 -0600 (CST), you wrote:
>From: gordt at gordtulloch.com
>Subject: Sup'R'Mod II docs?
>To: cctalk at classiccmp.org
>Message-ID:
> <OF5865A8A3.92952A07-ON86256FD2.00054328-86256FD2.000588A0 at gordtulloch.com>
>
>Content-Type: text/plain; charset="US-ASCII"
>
>Hi all:
>
>I just got an old //e with a Sup'R'Mod II RF modulator - I hooked it up as
>expected to the TV (my 3 year old loves Moon Patrol in mono, so I figured
>he'll love it more in color ;) but no joy - anyone out there got docs for
>this? A scan would be lovely, mail would be fine and compensated. Let me
>know, thx!
>
>Regards,
> Gord
Thanks to several suggestions from cc members, I found that
thermal fax paper on rolls is easy to find, for my "new" Texas
Instruments Silent 700 terminal.
However, I am not having as much luck finding a manual on-line. At
least not for a reasonable price. The data connector on the back
is a 15 pin D-sub male, (not 25 pin) and the unit specifically is
a model 745 (with the acoustic couplers).
Does anyone have the connector pinout?
thanks
Charles
I was sent the following from a guy in russia, about a PDP11 emulator
written for DOS in 1992. I have placed the file on classiccmp at the
following URL:
http://www.classiccmp.org/PDP-11/MISC/
The file is called rt11.tar.gz and the uncompressed files are visible as
well.
Jay West
----- Original Message -----
From: "Aceler" <aceler at rambler.ru>
To: <jwest at classiccmp.org>
Sent: Sunday, March 27, 2005 4:33 AM
Subject: PDP-11 Emulator
>I have a freeware DEC PDP-11 (originally, FODOS) emulator, written by A.
> Poletaev in 1992 for DOS, with some programs. But readme is in russian.
>
Does anyone happen to know the organisation of a SunOS 4.x hard drive?
Looking at the disklabel under Linux, I get the following:
| Disk /dev/sdb (Sun disk label): 15 heads, 131 sectors, 1701
| cylinders Units = cylinders of 1965 * 512 bytes
|
| Device Flag Start End Blocks Id System
| /dev/sdb1 0 48 47160 0 Empty
| /dev/sdb2 48 152 102180 0 Empty
| /dev/sdb3 0 1701 1671232+ 0 Empty
| /dev/sdb4 152 264 110040 0 Empty
| /dev/sdb7 264 1701 1411852+ 0 Empty
(ignoring the 'empty' - think that must be a bug in Linux fdisk as I
know there's a valid OS on the disk)
Googling shows the first entry to be the root partition on such a drive,
second entry to be swap, third to be the whole disk entry, and the rest
to presumably be aux partitions...
However, obviously some space is taken up by the partition table itself,
so the first (root) partition can't start at block zero. What I'm trying
to find out is the offset that it does actually start at, so that I can
mount the root partition from Linux.
Hopefully someone knows, if not it's trial and error time... :-)
ta
Jules
Someone recently asked for an Apple 9500 power supply. Who - and do you
still need it? I saw a 9500 at the bottom of a pile in the garge today.
Don't know what kind of shape it is in, but think it was working
when last powered up.
Billy
Ok, starting over here since there's been a long hiatus since the last
time I messed around with this.
I'm experimenting with different 8" disks trying to figure out what's
going on.
First, the basics: I know my controller can handle FM because I was able
to successfully copy all the files off an old 160K PC disk in my 1.2M
5.25" drive.
Second, the 8" drive can successfully format/read/write an 8" drive when I
have the BIOS configured for a 5.25" 1.2M drive. My drive is a Tandon TM
848-02. Someone e-mailed me a link to the manual they scanned, and now I
can't find that person's e-mail nor remember who it was (I'm so sorry!)
But at any rate, of the 3 measley links that come back from Google, I see
that this drive is DSDD. Still don't know if it can do FM however.
I have some 8" disks in both CP/M and DOS 2.11 format from my NEC APC.
They both read fine on the NEC APC.
I'm trying to read targeted sectors using debug.
With the CP/M disk, I try to L 0 0 0 1 (Load at address 0, drive 0, sector
0, 1 sector) and get:
Not ready reading drive A
Ok, so I try L 0 0 1 1 and after a longer pause get:
General failure reading drive A
Hmm, I'm still new to this, but this seems like a density issue.
Tried on the DOS 2.11 disk and got the exact same errors on both read
attempts.
I formatted an 8" disk under DOS, then tried L 0 0 0 1 from debug and
successfully load the sector into memory.
What's interesting is if I try to read sector 0 from the NEC DOS disk and
get the "Not ready reading drive A (Abort, Retry, Fail)" error, then
immediately put in my known readable formatted DOS disk and hit R)etry, I
get the same error ("Not ready reading drive A"). If I abort and then
retry, it works fine. Or if I wait at the Abort, Retry, Fail prompt for a
little while then retry, it also works.
Hmmm....
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
[ Old computing resources for business || Buy/Sell/Trade Vintage Computers ]
[ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]
Hi,
I've got a few old SC/MP-II chips and I decided to try and do something with them.
It appears that only 2 of the chips actually work, but I've just proto-typed a small
system with 4K ROM, 4K RAM, an 8251 USART and an 8255 PPI. I got the
comms going yesterday and the PPI is fine. Excellent old vintage stuff.
I forgot how cumbersome the SC/MP instruction set was, but it's fun trying to
code around its deficiencies. I've got a listing of the original KITBUG for the
SC/MP, but I'm going to expand on it to provide more functionality. I'll try and
base the monitor off the old Intel 8080 SBC monitor.
When she's all done then I'll wire-wrap it onto a single board and put it in a
nice display box. I like these things to work, as opposed to collecting chips
to sit and gather dust.
This brings me to a question. Does anyone know any chip brokers that sell
a small number of chips to hobbyists? I've tried a few but they seem uninterested
in selling small numbers and to private buyers. I don't understand this 'cos I doubt
there will be orders for thousands of old chips like the SC/MP from businesses -
and rather then sit and collect dust at least the brokers could sell some of their stock
to private buyers.
river
(Previously posted in html, my apologies).
I'm going to be bidding on a system with 5.25" drives, so I guess that's
what I'd need, even though I think the 8" drives are cooler.
Thanks, Andy
Has anyone ever wired up a reset button/switch for their IBM PCs? I find
myself powering down-then-up my 5150 three times a day when all it needs is a
hard reset to reboot a hung machine. I've searched the web and usenet archives
for such a design or specs but haven't found anything. If I could soldier a
few wires to a pushbutton, I feel like I would less harsh to the machine...
Or, does it not really matter? Is it not a big deal to power down, then power
up (after 5 second delay) a 5150 or 5160? I know IBM PCs were built well, but
I am unwilling to find out *how* well :)
--
Jim Leonard (trixter at oldskool.org) http://www.oldskool.org/
Want to help an ambitious games project? http://www.mobygames.com/
Or check out some trippy MindCandy at http://www.mindcandydvd.com/
I just took a look at the SIMTEL arechives on the Walnut Creek CP/M
disk, and they appear to have all the disks (judging by the directors)
up through volume 310. Take a look at:
http://www.rain.org/~marvin/sigm.txt
if you want to see what has already been saved from the SIG/M archives.
For some reason, I can't ftp the sigm.txt file and the amount that gets
transferred before it chokes varies each time I do it. The txt file
there currently has most of the listings but is missing some stuff at
the end. But in any case, it appears that what you have has already been
saved. If you do take a look at the list, note that there *are* some
typos in the list.
> I just received some 8" diskettes that I "won" on e-pay. I was only
> buying used SSSD diskettes, but when they arrived they contained files.
> They are SIG/M #81 through #120 and #161 through #176.
>
> My question is this. Are these files already archived and preserved for
> the "community" or should I spend some time (lots of time, actually) and
> get the files to a CD or something similar so those of us who are
> interested in CP/M history have them?
>
> I don't mind doing it, but I don't want to spend this time if it is
> already done.
>
> Thanks,
> Dave Mabry
> Intel MDS tinkerer
>
That would be yours truly; I had sent you a note off-list but didn't get a
reply. I've been copying/archiving some of it in PC format and sending
it to Randy for his Cromemco archive/museum (see his reply yesterday),
so contact him or me off-list & we'll see what we can do. Note that
Cromemco had at least 6 different (more or less [in]compatible) OS's
which may or may not be useful to you depending on what cards you
have in that Z2 (although CDOS is more or less the lowest common
denominator). Also, as Randy mentioned, if using PC-DOS format
images, you may have trouble with the oft-discussed FM/MFM issue.
mike
-------------------------Original Message:
Date: Sat, 26 Mar 2005 00:15:35 -0500
From: "Curt @ Atari Museum" <curt at atarimuseum.com>
Subject: Some said they have CDOS and Cromemco disks
Hi,
Some recently mentioned that they had a significant amount of
Cromemco software, if that person would be willing to allow me to make
dup's of their disks I would appreciate it, I have a CP/M system with
both 5.25" and 8" disks on it so I can handle reading both types, I have
a Z2 that I'd like to get up and running again and I would really like
to get copies of CDOS and any Cromemco specific utils, thanks.
Curt
Still in the box. Contains the connector, cable, and barrell connector.
It's small and light -- postage will probably be under $2.
Let me know, or it gets tossed.
Thanks.
Paul Braun
nerdware at laidbak.com
Visit NerdWare on the Web at
www.laidbak.com/nerdware
Apologies up front.
I have a (potentially) wonderful PDP-8/e with TU-56 and RK05 just begging
for attention (as soon as I can get ONE of my ASR-33's to behave properly).
I WANT to spend time on that machine. I also have and sbc-6120 I want to get
OS/8 up on for the MARCH show.
Still the "real world" makes demands.
Yet another weekend supporting (gasp) modern systems.
But some of the things that strike me are.....
It STILL takes the same amount of time for a system to boot..
It STILL takes the same amount of time to format a disk..
It STILL takes the same amount of time to install a (basic) OS
It STILL takes the same amount of time to customize the OS
..I can keep ranting...
Amazing, the more things change.the less they do.. [I KNOW the original
saying is different].
Thanks again
David..
> Date: Fri, 25 Mar 2005 20:49:01 -0800 (PST)
> From: Vintage Computer Festival <vcf at siconic.com>
> Subject: Starting over with 8" drive on PC
> To: Classic Computers Mailing List <cctalk at classiccmp.org>
> Message-ID: <Pine.LNX.4.33.0503252028580.784-100000 at siconic.com>
> Content-Type: TEXT/PLAIN; charset=US-ASCII
>
> My drive is a Tandon TM 848-02. Someone e-mailed me a link
> to the manual they scanned, and now I can't find that
> person's e-mail nor remember who it was (I'm so sorry!) But
> at any rate, of the 3 measley links that come back from
> Google, I see that this drive is DSDD. Still don't know if
> it can do FM however.
Not sure it this is what you're looking for, but here is the service
manual for the TM 848-2 - perhaps this is the same as the "02":
http://www.bitsavers.org/pdf/tandon/TM848_service_1982.pdf
>Find the 8284a (82284 in the AT) timer chip in the PC. When pin 11 is
>shorted to ground momentarily it will start the reset process. Also
>shorting the "power good" line from the power supply will do the same
>thing. The power good pin is supposed to be P8-1.
I recall at one time having an original IBM PC/AT with a reset switch
wired to ground the "power good" line. It worked fine, and was still
working when I got rid of it ... I don't know if all power supplies
would tolerate this - might be a good idea to put a small resistor in
series with the PS output so that you are not shorting it directly.
Regards,
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Collector of vintage computing equipment:
http://www.parse.com/~ddunfield/museum/index.html
If you have a decent monitor, the sync on green should not be an issue. Older
Macs and many workstations (SGI, all 3w3) run sync-on-green. If you do a
search on "connecting PC monitors to SGIs"
or similar it should tell you known monitors that work SOG. In any case, it's
probably much cheaper to find a used monitor that supports SOG than to buy a
box. Sony's monitors are a good bet (have 2, one OEMed by Radius, one by IBM,
both work Sync-On-Green.
-Scott Quinn
I just received some 8" diskettes that I "won" on e-pay. I was only
buying used SSSD diskettes, but when they arrived they contained files.
They are SIG/M #81 through #120 and #161 through #176.
My question is this. Are these files already archived and preserved for
the "community" or should I spend some time (lots of time, actually) and
get the files to a CD or something similar so those of us who are
interested in CP/M history have them?
I don't mind doing it, but I don't want to spend this time if it is
already done.
Thanks,
Dave Mabry
Intel MDS tinkerer
Anyone able to tell me what the best source for a ?po boy? to find a
MicroVax?
Thanks
--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.308 / Virus Database: 266.8.2 - Release Date: 3/25/2005
On Mar 26 2005, 9:41, Curt @ Atari Museum wrote:
> Right on the money! I didn't set the gateway address, that was
why
> it was receiving packets and not responding back, its working
perfectly
> now, I VNC'd to one of my outside boxes, open a telnet session to the
IP
> and viola! I got the cli prompt and accessed the port the Vax is on
> and it responded.
Well done :-) I must admit that it takes a while to get one's head
around all the annex config stuff, and figure out what gets set where.
--
Pete Peter Turnbull
Network Manager
University of York
On Mar 26 2005, 0:21, Curt @ Atari Museum wrote:
> Anyone here familiar with Annex Terminal Servers
I have one at work, where it was used mainly to provide dialup access,
offering both telnet and PPP. I also have one at home, where it
presently connects to a couple of terminals, a couple of SGI consoles,
a PDP-8, and will eventually connect a few more consoles (when I make
up the cables). It has reasonable security so my eventual aim is to
have it accessible from the Internet, for much the same reason you want
to hook up your Vax. I wouldn't connect it to the internet until you
have set up the security.
> I have one unit up and working like a charm on my vax system so I can
> use my PC to control the console port over my LAN. The Annex Term
> server is working fine on my local subnet, however for some reason it
> will not talk across from a remote system on another subnet through
my
> firewall/router...
You probably don't have all the configuration set up. I have the
manuals, about 9" of shelf space, and the remote management software.
You don't actually need that management software, but it does make
life easier.
My guess is that you don't have the gateway address (and/or subnet
mask) correctly set. I assume you know to use the "su" command from
the CLI to the superuser prompt, then the "admin" command to get to the
admin mode, and "show annex all" (etc) to see the configuration? You
need that to set the subnet mask (and many other things).
You don't set a default gateway like that, though. The annex uses its
routing table for that, and you can either set a static route using the
"route" command or by putting the route(s) you want in the "gateways"
section of the config file which it loads when it boots. You can
display the routes using "netstat -r" and "netstat -C".
After I compiled the software, I corrected a few of the manpages and
wrote a few extra ones, which I'll send you by private email. In the
meantime, here's a few useful URLs:
http://www25.nortelnetworks.com/library/rannex/relnotes/R10.1A-Release_Note…http://www.ofb.net/~jheiss/annex/http://lost-contact.mit.edu/afs/net.mit.edu/project/afs32/andrew/netdev/sun…
--
Pete Peter Turnbull
Network Manager
University of York
> -----Original Message-----
> From: Vintage Computer Festival [mailto:vcf at siconic.com]
> Sent: Friday, March 25, 2005 11:49 PM
> To: Classic Computers Mailing List
> Subject: Starting over with 8" drive on PC
>
<snip>
> 848-02. Someone e-mailed me a link to the manual they
> scanned, and now I
> can't find that person's e-mail nor remember who it was (I'm
> so sorry!)
I've resent the service manual in PDF format. If anyone else wants it, let
me know. It is VERY large, and I'm sure some will gripe that I didn't OCR
it, or scan at lower resolution, or etc, etc, ...
My response - scan it yourself then...
For me: storage is cheap, bandwidth is cheap, time is what I don't have
enough of.
Kelly
I am getting rid of my 9 track tape drives. All drives are Cipher 880,
890, or 990. None are SCSI.
I have one Kennedy I promised to ship to England. I also have 4
formatters for the older style drives.
It is all going in the dumpster. If anybody wants it, let me know and
we can make arrangements for you
to pick the stuff up. If you need more info, let me know as well, off
list. Oh, yes, one is a Cipher 910640,
which is the upright style, the others are all the pizza-oven style.
If I have forgotten and already promised some of this stuff to certain
people, now is the time to speak up!
Any manuals that I had are still with Al, but they may be on bitsavers
by now.
Cheers,
Joe Heck
I have only 5 computers that are older than 10 years. But none is
older than 20 years. It can barely be called a 'museum', but hey, at
least it's on-line.
http://www.wintersweet.com/computermuseum/
vax, 9000
I finally found the info on suggested TU-56 cap repair from the guy who
actually did it with these parts. Here is what he had to say:
> The capacitors are from www.newark.com part number 89F2059 with bracket
> 81F3218
>
> These must be replaced in pairs.
>
> Attached is a JPG of the mounting plate made from a 1/16" thick aluminum
> plate. The image should be to scale. The height is 5" and width is 4.3"
>
> The plate is attached using 0.5" 8-32 standoffs from www.digikey.com part
> number 8427K
>
> You will also need 1/4 and 3/8 8-32 screws.
Note that the caps he found & used are slightly different size than the
originals, hence a different mounting plate and brackets.
Hope this helps everyone! I can put the .jpg file refered to up if people
want to see that too.
Jay West
Hi All,
I have a Sum Sparc 1+ workstation, w kbrd, optical mouse, extern 1 gig
Disk, Monitor (1200x1024), that will eventually find its way to the
local recycle bin, if someone doesn't want it. The battery on the CPU
board is dead, so the system does not remember how to boot. The system
as SunOS 4.1.x loaded on it.
( From the new prompt: boot sd 0,2,0
or something like that )
It was last booted probably in 1998 or 99.
The system is located in Philadelphia area (19460 zip code). All you
have to do, is arrange to have it packed and shipped, or pick it up.
Original packing materials are not available.
Please reply off list if you are interested.
Lincoln
Free in the Washington DC area, you pick up only, will not
ship:
KA650-based uVax III in rack-mount BA213, with SCSI
controller, 9-track 1600/6250 drive, SCSI disk drives,
SCSI CD-ROM, all in H960 (6-foot) rack.
Q-bus system with 11/73 (KDJ11B) CPU, SCSI controller,
9-track 1600/6250 drive, SCSI disk drive, SCSI tape
drive, all in H960 (6-foot) rack.
Several DSD-440 dual 8" floppy systems and controllers.
All the associated cables, power controllers, etc., to
run the above systems. A five-foot non-DEC rack. etc.
First-come, first served. SCSI controllers not available
separately. You'll need a really big station wagon or
mini-van or small truck to fit the racks.
E-mail me at my regular address, shoppa at trailing-edge.com,
if interested. Stuff available for pick-up on evenings
and this weekend.
Tim.
>From: "Fred Cisin" <cisin at xenosoft.com>
>
>> "Nobody programs in assembly language anymore, nor ever will
>> again." - Clancy and Harvey (UC Berkeley)
>
>On Fri, 25 Mar 2005, Paul Koning wrote:
>> Wrong, and wrong. Where did they get that bizarre notion?
>
>The biggest reason why I don't think that I should retire yet -
>I teach an assembly language class.
>
>
>They're LISP (actually "SCHEME") fanatics.
>
>They demo'd an example that "can not possibly be solved in ANY way
>but recursion". While they were keying it in in Scheme, I wrote
>out a non-recursive solution (with a 2D array) in C, BASIC, FORTRAN,
>and I got halfway through writing the COBOL form.
Hi
I don't believe that the Turing test does recursion.
If that is so, they would have to believe that they just
proved that it couldn't be calculated on a computer
with or without recursion. An intersting exception to
the Turning test?
Dwight
>
>--
>Grumpy Ol' Fred cisin at xenosoft.com
>
>From: "John Foust" <jfoust at threedee.com>
>
>At 05:18 PM 3/25/2005, Dwight K. Elvey wrote:
>> I don't believe that the Turing test does recursion.
>>If that is so, they would have to believe that they just
>>proved that it couldn't be calculated on a computer
>>with or without recursion. An intersting exception to
>>the Turing test?
>
>Turing test? The one where he wants to sort the men from the women?
>
>- John
>
>
Oops! I meant the Turing machine used as a test for
computability.
Dwight
Folks not interested in DEC PDP-11s and SIMH may want to ignore this.
However for those interested in PDP-11s that have Mac OS X, I am
pleased to announce that a Mac OS X-specific port of the PDP-11
simulation of SIMH is available for download. Please use the
following URL to access the instructions and .dmg file:
<http://dundas-mac.caltech.edu/~dundas/retro/simh/>
This application is a port of PDP-11 simulation only of SIMH V3.3-2
(the current release) to the Macintosh OS X environment. The
application requires a G3 or newer with OS 10.2 or later in order to
execute properly. Features of the application include:
- Built-in complete VT100 emulation. No need to use Terminal.app to
access the console or run the simulation. The VT100 supports copy &
paste between applications. Emulation is very complete and has been
tested with TECO/VT, KED, and EDT.
- Built-in PDP-11 front console panel. The panel emulates a
PDP-11/70 console and can appear in one of three variants. All
switches are functional except S INST/S BUS CYCLE. Almost all lights
are functional. Keyboard equivalents are available for all console
switches. The Console also has an optional "speedometer."
- Interface to SIMH is either through SCP commands in the VT100
window or Macintosh native menus and dialogs.
- Dynamic tool tips (formerly balloon help) are supported in all
windows and dialogs.
- On-line help and documentation.
- The application looks for a fixed configuration file
(~/.simh-pdp11rc) at startup. All file commands may specify relative
paths with ~ or ~user.
- The application can optionally spool LPT output to a PostScript
printer, simulating greenbar paper, as the simulation creates it.
- The application supports Processor Services allowing other applications to
send commands to the VT100 or Console windows. Copy and paste is
supported in the VT100 window. Drag and drop will be supported in
future releases.
- The application provides desktop icons for tape container files
(.tap). Tapes (.tap and .tk50) can be attached while the simulation
is executing by double clicking on the files. [This capability soon
to be added for disk container files as well.]
Please enjoy and send any feedback directly to me.
Thanks,
John
Noob warning.
Can anyone help me identify the part numbers of the cable(s) which
would be used to connect an RX50 to an RQDXn (mine's a 3) in a
BA23 case? Say an 11/53 or 11/73 type of machine?
Thanks,
De
This is a bit of a shameless plug but hmm its not off-topic so ;-)
Been expanding my page a bit and this is the latest addition
http://www.mansier.net/classifieds_1_3/
Any suggestions for more categories are welcome. You can ofcourse also
offer any swap's there or give away's. As long as its about vintage
computer stuff.
Cheers,
Stefan.
-------------------------------------------------------
http://www.oldcomputercollection.com
I've got some manuals, but NO DISKS for some older
Intel tools; the stuff is taking up room on my limited cube
desk space. It is possible that the disks will eventually
turn up, but don't count on it.
Anyway, I have these manuals, all in good shape, all
in their original slide-in boxes as a four-box set. The
copyrights appear to be all from 1988.
* Intel ASM386 Macro Assembler Operating
Instructions for DOS Systems
* Intel iC-86/286/386 Compiler User's Guide for
DOS Systems
* Intel386 Family System Builder User's Guide
This has two boxes.
The caveats? A few...
* YOU pay all shipping. I'll ship, send you a UPS
tracking number and a total, then you pay via
check, money order or PayPal.
* YOU agree to add it to a museum, use for personal
use, etc. You may NOT just turn around and sell
them on eBay.
If you've got some unwanted KIM-1 stuff, I'd be more
than happy to exchange this Intel stuff for your KIM
material!
I hope to be at TCS in a few weeks and would consider
delivering them in person. Questions? Just ask!
Thanks
Bob
-------------------------------------------------
Bob Applegate
Senior Software Engineer
Embedded Development Group
Ulticom, Inc
856-787-2761
I am pretty surprised that I can't find any good technical descriptions of
the Apple ][ disk controller. It's not in the DOS manual and, come to
think of it, I can't think of any publication Apple came out with that
describes it. I wonder why this is?
Does anyone have any good suggestions for reference material on this
subject? I've got Beneath Apple DOS, which is of course excellent, and
the Bag of Tricks manual (which rehashes a lot of what's in BAD), but
nothing outside of those really describes the disk controller circuitry at
an even lower level. I want to know what's going on in the PROMs, and why
the certain rules of encoding data are why they are (i.e. first bit of
every disk byte must be set, no more than one set of consecutive zeros in
any byte, etc.)
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
[ Old computing resources for business || Buy/Sell/Trade Vintage Computers ]
[ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]
I have a lot of old tax preparation programs, multiple OS formats mostly in
the "newer vintage" timeframe, but some older stuff too. I thought I
remembered someone posting a notice looking for accounting software. I
plan to re-use the disks for scratch, especially the newer 5 1/4" PC format
software, if I do not get any takers. If interested contact me - billdeg
at aol dot com.
-Bill
Hi,
Due to my inability to read a EPay auction correctly, I'm now the
"proud" owner of 25 CompacTape tapes. I was looking for CompacTape
II's for my TK70 drive.. (oops)
Anyone want to trade feel like trading some TK70's for my TK50's?
No, I'm not looking for a 1:1 swapping ratio, though I'm not going to
complain if it were. :-> All I was looking for was 6-10 CompacTape II's
tapes to putter around w/ on my VAX.
I also need to admit, I've not tried reading any of these tapes to see
if they're good. All but one have their cases. They "look" reasonably
well stored to me if that means anything.
Dayton OH area. Would kinda prefer to avoid overseas shipping. (sorry)
Prefer replies off list: dholland at woh.rr.com
(Though honestly, I'm not entirely certain I'm proposing is a fair trade
- so friendly comments to that effect will be listened to.)
thanks,
David
> The TE10 uses the TE16 transport with a Unibus TM11 interface.
> The TU10 used the TU16 transport with the Unibus TM11 interface.
>
> The TE16 is the redesigned version of the TU16 with a better
> tape path, auto-rewind to BOT after tape load etc.
>
> The TE10 is the better unit although both are the same spec
> 800bpi/1600bpi (IIRC) and 45ips (or is it 45ips rewind speed?).
>
> I used to do a lot of Field Service on the DEC tape drives
> and the TE16 was pretty reliable -- with only the tape locking
> mechanism breaking (same part as one of the Kennedy drives).
>
> Bill
Hmmm, what are my options when the thin "rubber" layer of the
capstan roller went goo, Bill?
Capstan roller might not be the correct term, it is the roller
that transports the tape to the upper (pick-up) reel.
On both my TE16 drives the rubber has become *very* sticky,
so I am listening for any solution ...
- Henk, PA8PDP.
On Mar 24 2005, 23:12, Jerome H. Fine wrote:
> >Pete Turnbull wrote:
> >Actually it's a 34-way cable, just like the 34-way cable used for a
PC
> >3.5" drive, though without the "twist" that most PC drive cables
have.
> >
> Jerome Fine replies:
>
> As usual, you are correct. I suspect that my
> error would have been noted as soon as the attempt
> to actually plug the 40 pin cable into the 34 pin
> header of the RX50.
Yes, it would have been obvious and probably not caused any confusion.
I only posted the followup in case anyone else who'd not seen the
distribution panel went looking for a cable in advance, really.
> As for the lack of a twist, I seem to remember that
> the twist was only after the first connection, i.e.
> on the second connection. Since there is only a
> single connection to the RX50, if I am correct,
> the twist would not affect anything.
That's right. I've used cables like that.
--
Pete Peter Turnbull
Network Manager
University of York
wuuuuuuuh waaaaaaah wuuuuuuuh waaaaaaah wuuuuuuuh waaaaaaah wuuuuuuuh
waaaaaaah wuuuuuuuh waaaaaaah wuuuuuuuh waaaaaaah click click click...
I'm sure QIC-24 tape drives were designed for the sole purpose of
driving me insane :/
>>>>> "vrs" == vrs <vrs at msn.com> writes:
>> I am currently modifying my Teletype ASR33 into a LT33 according
>> to the
vrs> DEC
>> specifications to work with my PDP-8/L. Does someone know what is
>> a Thyractor (GE 6RS20SP4B4) ? Some kind of voltage clamping device
>> ?. How could I make one, using, for instance a pair of thyristors
>> or a pair
vrs> of
>> zenner diodes ?
vrs> thyractor: "A marketing name by DAVIS, the thyractor was a
vrs> combination of a low loss choke (the reactor) and a thyristor."
vrs> I know NTE still markets a replacement for the 6RS20SP5B5 (but
vrs> not the 4B4). Unfortunately, I don't have the detailed specs
vrs> for the 4B4.
vrs> On the other hand, I think it is just a handy voltage clamp to
vrs> keep the semiconductor circuits from seeing the inductive spikes
vrs> from the TTY. Shouldn't be too hard to come up with something
vrs> else that would work.
If it's a voltage clamp, then either back to back zeners, or a MOV
should work. MOV might be the better choice since they are explicitly
designed as protective devices. Zeners would be ok in the larger
sizes, but the small ones may be fragile enough that they don't do
well in this application.
paul
On Mar 24 2005, 9:15, Jerome H. Fine wrote:
> Dennis Boone wrote:
>
> >Can anyone help me identify the part numbers of the cable(s) which
> >would be used to connect an RX50 to an RQDXn (mine's a 3) in a
> >BA23 case? Say an 11/53 or 11/73 type of machine?
> >
> Jerome Fine replies:
>
> The BA23 normally arrives (i.e. has as standard
> hardware) a distribution panel for the RX50 dual
> floppy drive and RD5n hard drives. A 50 pin flat
> cable with a female header at both ends is used to
> connect the controller (RQDX3 in your case) to this
> distribution panel. The distribution panel has a
> 40 pin connection available in approximately the
> centre (although only the connection headers are
> visible through holes in the bulkhead between the
> distribution panel and the area which holds the
> floppy and / or hard drives). The cable to be used
> is a 40 pin cable with a female header at both ends
> and usually about 10" in length (when used in a BA23).
Actually it's a 34-way cable, just like the 34-way cable used for a PC
3.5" drive, though without the "twist" that most PC drive cables have.
The RX50 uses an almost-standard SA400-style interface
.
--
Pete Peter Turnbull
Network Manager
University of York
>Oh yeah, and one sold last week on ebay (no drives, not tested) for
>$182... so IF the guy really has an untested unit he is able to sell for
>$2000... he is one lucky SOB.
I'll let ya know if he says the sale actually went through (I asked him to
keep me posted).
I corresponded with the guy a few times back and forth when he first contacted
me, to help him figure out what he had... My "gut feel" is that he's not trying
to scam, but he may be getting scammed - I sent him to one of the fraud sites
to read up on scams involving buyers offering unrealistic prices.
I personally take Ebay prices with a big grain of salt --- In looking for the
Black Apple you mentioned, I noticed a "@@LOOK@@ ***RARE*** Original Macintosh
128" up to $250 ... (I bought a near-mint Mac (128) with a nice carry bag,
external floppy drive and other goodies for $19 (Cdn) at a local goodwill shop
a couple of months back).
And I do have to add shipping ($50+ on something this big) plus taxes, duty,
brokerage and currency conversion to anything I purchase from the states, so I
felt $150 (base) and the aggrevation of getting it here was not worth it to me.
But, I agree that someone who REALLY wanted it and/or didn't know better might
pay a few hundred ... (especially if they are an Ebay type). It wasn't until it
went over $500 and then $1000 that I really started to think that he might be
getting scammed.
Anyone have advice to pass on to him - anyone used agents/services to perform an
overseas transaction more safely etc.?
Regards,
Dave
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Collector of vintage computing equipment:
http://www.parse.com/~ddunfield/museum/index.html
Quick check to see if anyone's ever tried this. (where "tried" =
"written some code to do so")
In theory one could hook up a system running linux/*bsd with a SCSI
controller present acting as a target rather than initiator, and have
the machine pretend to be a tape drive, hard disk etc.
I have no idea if the linux / *bsd kernels (or card drivers) support
running as a target, or if the necessary hooks are present into user-
land (eg. via 'sg') to allow user code to do the emulation, though.
Just thought I'd ask if anyone's attempted to do it before...
(personally I can write sg device code, but I'm by no means a kernel
hacker)
cheers
J.
Hello,
I have two RK05J drives, both exhibiting the same problem.
They are *not* currently connected to a system. I have them on the bench
cleaning them up and getting them ready to connect to a PDP 8/e system after
a long period of storage.
There is the I/O terminator card installed in the proper slot in the drive
electronics backplane.
When the drives are powered up, the "power" and "load" lights are on, and
the door release is activated so that the door can be opened and a disk pack
inserted. However, the blower motor that provides the air circulation for
the drive never starts up. I've checked both blower motors to assure that
they are not seized, and the both spin very freely. I traced the power
wires from the blower motor to a barrier strip, where I checked for
110V AC power, and there's nothing there. So, somewhere in the
circuitry, something isn't right. Any ideas?
Thanks,
Rick Bensene
The Old Calculator Web Museum
http://oldcalculatormuseum.com
For the archives, as this might save someone else a lot of messing
around one day :-)
Was struggling to get a 400t to install from tape as it'd always die
with "(open_input_volume) Unable to open volume. (unrecognized error
status 28000B)" after doing a tape retension when loading from the boot
tape.
It was driving me nuts as I'd tested the drive and media elsewhere and
it was fine, plus it was reading CALENDAR / INVOL / DOMAIN_OS from the
boot tape fine. I spent a long time messing around with SCSI cabling,
double and triple checking devices ID's etc.
As a last resort I tried my 150MB SCSI tape drive - I've known it to be
a little flakey with reads sometimes, but I just wanted to see if
behaviour was different. Guess what - it's worked fine!
The 150MB drive is a little newer than my 60MB one. All I can think of
is that the 60MB drive takes a little too long to become ready again
after the retension for the Apollo's liking, and it times out. Maybe
it'd be fine on a slower machine (DN3000 / DN3500 say) but it isn't up
to the job on a 400 series system.
Anyway, maybe this'll save someone a bit of pain one day (it takes
around 15 minutes each to run invol and calendar from tape and well over
30 for domain_os, so it's rather a slow process to keep on having to do!
- I've probably run through it ten times in the last 2 days trying to
figure out what was going on)
cheers
Jules
It's one thing to comment on a specific article, but there's no reason to
indict a whole group of people and say that we're one notch about fast food
workers. That is not only incredibly stupid, it's direct intolerance. He
might as well have been talking about a race or religion or nationality --
which surely would not have been tolerated here.
--- Kurt Huhn <kurt at k-huhn.com> wrote:
>
> Why is it that every time someone says the least thing "boo" about the
> media, you get your panties in a twist? Give it a rest. He's entitled to
> his opinion.
I was playing with an old copy of Acrobat at work and
created a pdf of an old Apple Gift Catalog I had
laying around. Thought I'd let anyone interested know
about it. It was interesting seeing how many items in
it I had picked up at one time or another. You can
find it in my Apple 2 area at
http://www.trailingedge.com/apple2/ in the "History"
section as "Old Apple Gift Catalog".
Side note, are there other options for creating a pdf
like this or is getting my own copy of Acrobat it?
Thanks
There's an AS400 in an auction in Grand Rapids. Current bid, $50.
Auction ends tonight at 8:00 ET.
This is the liquidation of the assest of the company which was busted
by the feds last year for massive investor fraud.
http://www.biddingatauction.com/listings/details/index.cfm?itemnum=795843156
FWIW,
De
>From: "Eric Smith" <eric at brouhaha.com>
>
>Sellam wrote:
>> It would have if it wasn't decided that 80 or so synchronization bytes
>> were absolutely necessary between each sector. I still don't quite
>> understand what reasoning went into that particular aspect of the
>> design.
>
>Suppose you format a disk on a Disk II that is 10% fast. Now you stick
>the disk in a drive that is 10% slow, and write a sector. The 342
>nibbles of the data field will take up the space on the disk that was
>formerly used by 417 nibbles on the disk, or the 342 nibbles of the
>data field plus 75 nibbles of the gap.
>
>And I've ignored the header and trailer bytes, and the new self-sync
>written in the gap and after the end, so it's actually worse than
>that.
>
>As it is, 80 nibbles of gap isn't quite enough to allow for +/-10% speed
>variation and leave still leave enough self-sync bytes, but if they
>reduced it, writing a sector might overwrite the address field of the
>next sector, rendering that sector unreadable (even though the data
>field of that sector would still be intact).
Of course, when did you see a drive that is anywhere
near 10% off in speed? Even the older belt drives could
hold better than +-5%. 5% is over one strobe maker per
second ( for the older disk with stobe marks ).
The newer drives with electronic commutating can hold
much better than that.
Dwight
>
>They couldn't fit 17 sectors without seriously compromising the
>allowable speed tolerance.
>
>Some copy-protected games crammed in more by writing one giant sector
>per track.
>
>Eric
>
>
Some good info and references have already been posted, but another
place to look is "Beneath Apple ProDOS" (the follow-up to "Beneath Apple
DOS"). It covers GCR, nibblizing and the state machine, and includes a
dump of the PROM. It references "Understanding The Apple II", which I do
not have, so I don't know if their content is orthogonal.
Also, I remember hearing that there's some info in the manual that came
with the Disk ][.
-- Adam
I really wanted that too, instead I ended up with
someone very sweet at the time who saw it, knew I
wanted it and went off and made one herself for me.
Still have it and still love it. :)
--- Vintage Computer Festival <vcf at siconic.com> wrote:
> On Wed, 23 Mar 2005 nospam212-cctalk at yahoo.com
> wrote:
>
> > I was playing with an old copy of Acrobat at work
> and
> > created a pdf of an old Apple Gift Catalog I had
> > laying around. Thought I'd let anyone interested
> know
> > about it. It was interesting seeing how many
> items in
> > it I had picked up at one time or another. You
> can
> > find it in my Apple 2 area at
> > http://www.trailingedge.com/apple2/ in the
> "History"
> > section as "Old Apple Gift Catalog".
>
> Oooh, I want the latch-hook rug kit!
>
> Too cool!
>
> --
>
> Sellam Ismail
> Vintage Computer Festival
>
------------------------------------------------------------------------------
> International Man of Intrigue and Danger
> http://www.vintage.org
>
> [ Old computing resources for business ||
> Buy/Sell/Trade Vintage Computers ]
> [ and academia at www.VintageTech.com || at
> http://marketplace.vintage.org ]
>
>
>
>
> Message: 3 Date: Wed, 23 Mar 2005 21:11:49 -0500 From: "Ashley Carder"
> <wacarder at usit.net> Subject: RE: TU10 vs TE10 To: "General Discussion:
> On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Message-ID:
> <AAECIIBCJNMHBHOFJIBPGEGPCMAA.wacarder at usit.net> Content-Type:
> text/plain; charset="US-ASCII"
>
>>>>>>>> >>>>> "Ashley" == Ashley Carder <wacarder at usit.net> writes:
>>>>>>>
>>>>>>>
>>>
>>> Ashley> What's the difference between a TU10 and a TE10 DEC magtape
>>> Ashley> drive?
>>>
>>> I don't remember a TE10. There's a TE16, which as far as I remember
>>> is a TU16 with the mechanics made more user-friendly (easier tape
>>> loading and all that).
>>>
>>> Looking at the RSTS code, there is no trace of TE10 in there, so it
>>> looks like the difference is invisible to software.
>>>
>>> paul
>>
>>
>
>The tape drive that's currently on ebay with the 11/34 in the short
>cabinet has a label that says TE10 on the back. The seller sent
>me some pictures that appear to say TE10, and he says it's a model
>TE10. Take a look at ebay item 5178288415. Looks like a TU10
>with different style buttons on the control panel.
>
>Ashley
>
The TE10 uses the TE16 transport with a Unibus TM11 interface.
The TU10 used the TU16 transport with the Unibus TM11 interface.
The TE16 is the redesigned version of the TU16 with a better tape path,
auto-rewind to BOT after tape load etc.
The TE10 is the better unit although both are the same spec
800bpi/1600bpi (IIRC) and 45ips (or is it 45ips rewind speed?).
I used to do a lot of Field Service on the DEC tape drives and the TE16
was pretty reliable -- with only the tape locking mechanism
breaking (same part as one of the Kennedy drives).
Bill
Bill
Hi
I meant to jump in earlier when we were talking
about the data formats on disk but got side tracked
with work ( ick! ).
It was mentioned that one could have no more than
two concecutive zeros. It was mentioned that this
was a speed issue of the disk. Actually there is
another reason. The level of the signal from the disk
is constantly changing. Think of driving over a rough
road and you want to count the rocks but not the
larger bumps. If you just set a fixed threshold
on the shocks, every time you went over a bump,
you would miss a bunch of small rocks while the
suspension system was absorbing the larger bump.
Now, if you made the system track the slower larger
stuff, you could ignore the large bump and still
see the rocks. The problem is that the system now
sees the occational rock when there was none for
some time because it is drifting along. By making
sure that there are occational rocks, the system
can stay adjusted to be most sensitive to the
rocks without having false detects.
The disk read is the same, it needs to see data
>from the disk surface to keep the threshold detection
circuit from having false detects from noise and random
level shifts.
Dwight
Is there a "field guide" for HP 9000/300 systems like we have for DEC? I
would like to find more info on, for example, the 98547A RGB video
interface, 7958B Opt 550 disk drive unit, etc.
Also, in my 9000/375 there is a board which fits into a smaller card guide
assy (i.e., it is not the same physical size as the CPU and video modules,
but smaller) which has a paper sticker with several numbers including the
part number: A3057674-11.
It has an 80286 CPU chip on it which leads me to think its some sort of I/O
processor (?). No connector headers on the board; all connections go
through the edge connector. Can't find anything while searching on the
A3057 portion of the p/n (Axxxx is a type of part numbering scheme HP used
for some boards and stuff) nor on many combinations of parts of the p/n.
Thanks for your help.
BTW, while perusing the 'Net through Google looking for DEC SCSI boards I
found an RQZX1 (M5977) for Unibus for 'only' $2999.00 through a reseller
<http://www.varx.com/MODULES.HTML>. A Qbus RQZX1 was pegged at the same
price. Geeez, my wife is hoping to get only $2500 for her used 1993 Jeep
Grand Cherokee with 106k. Maybe they'll take a swap plus a few bucks for
either one? :-)
Regards, Chris F.
NNNN
Christian R. Fandt, Treasurer
Antique Wireless Association, Inc.
Jamestown, New York USA
email: cfandt at netsync.net
Electronic/Electrical Historian
URL: http://www.antiquewireless.org/
The DHL truck came with 77 more books today and there were many good titles
in the boxes. I picked two to pull for reviewing, digital PDP-11
Architecture Handbook 1983 and TTL Cookbook by Don Lancaster 1976 (fifth
printing).
Just curious,
Does anyone on the list have an extra unibus tape controller which has a
pertec interface and emulate tmscp?
I believe both emulex and dilog made such things.
If anyone has one collecting dust and would like to bargain, please
email me.
I have an TS05 I'd like to try out.
thanks!
-brad
I added support to SPCWR3.PA for the VC8/I.
http://www.chd.dyndns.org/pdp8/VC8/SPCWR3_vc8i.PA
This requires an EAE and now I find out that my untested EAE does not work.
The first sign of problems was that the processor paused while running
and the only way to stop it was to turn off power. The HALT switch did
nothing.
I got a copy of MAINDEC-8E-D0LB-D which is EAE test 1 and it locked up
pretty much the same way. I removed the EAE and the diagnostic halted at
a reasonable place insteading of locking up.
The EAE stops the main processor sequencer and then does it's thing and
when it is finished, restarts the processor sequencer. I seems to me
that this handoff is not occuring properly. The front panel shows that
the processor is stuck in Execute (E) State with a 7 in the IR and the
PC within one of an EAE instruction.
This not gonna be easy to fix. The over-the-top connectors prevent the
use of an extender card, so I can't probe anything easily.
Since the MAINDEC tests won't run, I will try to figure out which if any
of the EAE instructions function and which to not. Since, so far,
everything seems to hang, it might be something fundamental, and that
might be easier to find.
Suggestions, comments please.
-chuck
>>> It was a bit harsh, and I apologize.
Thank you. Same here.
>>> And I am glad that there are people like you around who can write
authoritatively on a subject that non-tech people have trouble
understanding.
Well, that's just buttering me up. Thank you though. :)
>>> I think the expectations placed on magazine writers are unrealistic and
driven by profit and advertiser appeasement.
There are always a minority of publications with lax ethics, as there are
always a minority of companies with lax ethics in any business. Please don't
let that or a famous case here and there lead you to think we're all a bunch of
bastards. (Last time this topic came up, I used the analogy of "how would
full-time computer nerds like it if I said you're all a bunch of socially
clueless acne-face loners," which totally backfired on me because a few people
replied and said "well that would be accurate...")
Jay: I'm done now. :)
Thanks for the suggestions. The 79 cutoff is
really because I have a modest but working
collection of machines from 1980-1990 (UNIX
workstations) so I've got that covered.
I thought I'd turn my attention to pre 1980's
hardware before it becomes really difficult
to track down and PDP is probably the obvious
choice.
The 11/34 looks a good choice at this stage?
Regards
Ian.
__________________________________
Do you Yahoo!?
Yahoo! Small Business - Try our new resources site!
http://smallbusiness.yahoo.com/resources/
> Hey, Mr. Fogg: I'm a reporter and a pretty serious computer
> collector, too.
> So, if it makes your tiny brain happy, go ahead believing
> that anyone who isn't in high-tech must not be as smart as
> you; that any idiot can be a good writer and researcher; that
> I spend my day like the papparazzi desperate to fill pages;
> and that it's all to inflate my ego. Oh, and that I'm one
> step from selling fries at McDonalds, that sure was clever of
> you. But you know what?
> When your computer company has layoffs, that will be
> something to write about too. Maybe then you'll be selling
> fries, or worse, reduced to helping stupid users at Fry's.
> At least they won't off-shore your job, you moron.
My company did have massive layoffs - 2 years ago - due to Microsoft
buying them. With 20 years of broad enterprise experience I've yet to be
re-employed. I have a terminal illness that is beginning to show
physical signs that HR people ask about, so re-employment is not likely.
I cannot perform the job of fry chef as I cannot stand for more than an
hour.
In my blanket generalization of *magazine* writers (not newspaper
reporters and book writers) I never made a claim of specific
intelligence. In fact I labeled them as Journalism and English majors,
not idiots that can't get a college degree. But my statement stands -
they typically don't have the background to fully understand what they
are writing about. Most magazine articles are written in a style that
presents the author as someone knowledgeable in the subject of the
article (a difference from reporters who present what they find and how
they found it). Book authors usually *are* knowledgeable in the subject,
and often partner with a writer to better present the material in a
professional and understandable manner.
My inclusion of a reference to fast-food workers was actually a vague
reference to the stabs at certain professions such as Journalism/English
repeatedly made in the comic strip "Dilbert". Some professions, such as
music, acting and writing, have a stigma of early-career joblessness
(how many actors were waiters?). It was a bit harsh, and I apologize.
This has nothing to do with technocracy or elitism. I don't expect a
lawyer or physician to build or fix their computer systems and I don't
practice law or medicine. Consumer-grade tech magazines have become a
vast wasteland of simplifications and brain-candy. I think the
expectations placed on magazine writers are unrealistic and driven by
profit and advertiser appeasement.
And I am glad that there are people like you around who can write
authoritatively on a subject that non-tech people have trouble
understanding.
Hey, if you agree with Fogg's assertion that ALL of the media are hardly
qualified to ask "you want fries with that?", then I really don't give a
(bleeped out) what you think.
--- Doc Shipley <doc at mdrconsult.com> wrote:
> Computer Collector Newsletter wrote:
> > It's one thing to comment on a specific article, but there's no reason to
> > indict a whole group of people and say that we're one notch about fast food
> > workers. That is not only incredibly stupid, it's direct intolerance. He
> > might as well have been talking about a race or religion or nationality --
> > which surely would not have been tolerated here.
>
> It might help your case if you didn't:
>
> A) Keep resorting to personal insults, and
>
> B) Keep proving the stereotype.
>
> Congratulations, Mr. Reporter! You're the very first Classic
> Computers list member ever to make my killfile.
>
>
> Doc
>
>
Joe R. <rigdonj at cfl.rr.com> wrote:
> Things like that are exactly what gives reporters and the
> like the image of being a bunch of incompetent boobs.
^^^^^
Boobs? Isn't our Mr. Reporter male?
(Sorry, couldn't resist.)
MS
I'd like to include a PDP in my collection, but not
sure what to go for? My requirements would be
1) It has to be a 70's design
2) It needs to be reasonably compact
3) I'd like to run something 'unix like'
with a c compiler as an option.
4) My budget is not huge <$1000
Any recommendations?
Cheers
Ian.
__________________________________
Do you Yahoo!?
Yahoo! Small Business - Try our new resources site!
http://smallbusiness.yahoo.com/resources/
So how of you out there saw my name in this RE: message and groaned, "not
again..."?
Hey, Mr. Fogg: I'm a reporter and a pretty serious computer collector, too.
So, if it makes your tiny brain happy, go ahead believing that anyone who isn't
in high-tech must not be as smart as you; that any idiot can be a good writer
and researcher; that I spend my day like the papparazzi desperate to fill
pages; and that it's all to inflate my ego. Oh, and that I'm one step from
selling fries at McDonalds, that sure was clever of you. But you know what?
When your computer company has layoffs, that will be something to write about
too. Maybe then you'll be selling fries, or worse, reduced to helping stupid
users at Fry's. At least they won't off-shore your job, you moron.
--- James Fogg <James at jdfogg.com> wrote:
> > Gee... lets just completely overlook the Apple Mac Portable
> > and mention
> > the Powerbook 100 instead... The Tandy 100 could've gotten
> > a mention,
> > even the Atari Portfolio could've gotten a mention too.
> >
> > Its times like this, you want to roll those mags up and shove
> > it up the editors arse !!! ;-)
>
> Magazine writers are Journalism and English majors. They are one
> paycheck away from "would you like fries with that?" The relentless
> drumbeat of deadlines makes them desperate to fill their little part of
> the magazine with anything that sounds good, or it's fry grease for
> them. After a while they begin to believe their swollen ego.
>
> It's not just computer mags, look at all the hopelessly simplified (or
> wrong) psychological advice given in women's magazines.
>
>
Evan's personal homepage: www.snarc.net
*** Tell your friends about the (free!) Computer Collector Newsletter
- 700 readers and no spam / Publishes every Monday / Write for us!
- Mainframes to videogames, hardware and software, we cover it all
- W: http://news.computercollector.com E: news at computercollector.com
I fully agree that the article wasn't very good, but Tom, I know you're more
reasonable than this: you're directly accusing the magazine of including Sony
because they are an advertiser??
C'mon...
--- Tom Jennings <tomj at wps.com> wrote:
> On Wed, 23 Mar 2005, Roger Merchberger wrote:
>
> Computer magazines are pretty consistently worthless today -- they
> know only about sales. They could be selling wicker baskets, same
> difference. New! Improved! Same but no different!
>
> > Their idea of the 13 "critical machines" to me is disappointing - The Sony
> > Picturebook at best has had minimal market impact and is rarely seen
> outside
> > Japan;
>
> But Sony is probably a big advertiser. It's pretty much as simple
> as that.
>
>
>
>
> If you don't pick at it, it doesn't hurt :-)
>
>
Evan's personal homepage: www.snarc.net
*** Tell your friends about the (free!) Computer Collector Newsletter
- 700 readers and no spam / Publishes every Monday / Write for us!
- Mainframes to videogames, hardware and software, we cover it all
- W: http://news.computercollector.com E: news at computercollector.com
Hi
I have a friend that is working on some 4004 stuff.
He is looking for the binary code for the prom set
called A0750-A0758. Does anyone have this kind of
stuff in their old ISIS disk collection? I believe
this was mainly used on the SIM4-02 boards.
If course, any software for the 4004 and/or the
SIM4-01/-02 boards would be great as well.
Dwight