> From: Tony Duell <ard(a)p850ug1.demon.co.uk>
I wrote:
> > After checking the schematic I find that there is a link. "Use L1 for
1K
> > RAM, use L2 for 2K RAM." This tells me that when a 4118 or two 2114s
are
> > used (or a 6116???) there is no need to change the jumper -- it's only
> > required when using a 2KB 2016 or equivalent.
Tony replied:
> What is this link connected to? What does it reconnect?
Ok -- I have yet another version of the schematic here, and it agrees with
the first -- L1 for 1K and L2 for 2K but does NOT specify what this means
in terms of the actual number of RAM ICs onboard.
>From looking at the schematic from the ZX-TEAM web site, I can't see how
either jumper would affect a two-chip configuration. L1 ties the single
RAM chip's A10 to +5V, while L2 ties the single chip's A10 to the A10 line
on the system bus.
Can you make any sense out of this, or is it necessary to be Clive Sinclair
in order to understand it?
As mentioned in a previous post, the 2-RAM-chip ZX81 PCBs I have at hand
have NEITHER L1 or L2 installed.
I would consider experimentally changing the links L1 and L2 and seeing if
this made a difference in the amount of RAM present, except that we're
talking about +5V and I don't want to toast any ICs, even common ones, if I
can avoid it.
Any insight you can provide will be helpful.
Glen
0/0
Anybody know what Manesa is? Is it an IBM facility? The 9577 I just
bought has sticker, and a stamping on it that says "Manesa".
--
Chad Fernandez
Michigan, USA
Hey guys,
I am working on a project to breath life back into some old hardware. I
order to do so, I need some documentation / assistance in writing low-level
routines to talk to various HPIB devices. Specifically: I would like to talk
to a HP 7978 tape drive, a CS80 compatible tape drive, or a common HPIB disk
drive.
I don't need help with HPIB protocol, I need to know the sequence of
commands (sent across the bus) to move data into and out of those devices. I
would expect to find this information in the programming manuals for those
devices but so far, have been unable to locate the docs.
If anyone can provide documentation for any of those devices or has
experience programming them, I'd appreciate the assistance.
Thanks,
SteveRob
_________________________________________________________________
Chat with friends online, try MSN Messenger: http://messenger.msn.com
Somebody recently posted a fairly comprehensive list of floppy drive
model #s with their capacities & base specs. I'd like to grab a few
not-1.2M drives before we scrap them, but I've misplaced the list.
Would whoever it was be willing to repost?
Thanks
Doc
Well today I went down to one of the warehouses to look around for some
items I needed (didn't find them) and found the following items:
1. A box marked CP/M 2.2 for Commodore 64 in it was a manual and a large
black cartridge ( it has a Z80 microprocessor in it). I'm missing the
CP/M disk which contains both the operating system and some utility
programs. If anyone has a copy email me off list. THANKS in advance.
2. A green and off white plastic computer called a IQ 8300 with green
rubber keys. It has a POWER 3000 32K Ram black module about the size of
a Sinclair 1015 module. I have no Doc's or box for it and it's missing
the power supply as well. With have to do a google on this one, if
anyone has one or knows anything it let me know.
3. A Panasonic Personal Computer 32K memory model JR-200U. It's light
brown and silver in color with dark gray soft rubber keys and some dark
blue rubber keys also. It has a built in power supply with the cord
coming out the back. It also has the RF unit with so I will test it out
tonight.
4. A Sun type 5 kb missing four key caps.
5. Two HP model 9130A floppy disk drives.
6. hp 86 with 82936A rom drawer, 82937A HP-1B interface module,82900A
CP/M system module, and a 82909A 128K memory module.
7. hp 97 calculator missing adapter and battery.
All in all I had a ball opening boxes that have been packed for almost 6
years now while I was up North.
In a message dated 3/26/02 5:47:58 PM Pacific Standard Time,
ernestls(a)attbi.com writes:
> What size floppy disks does the HP 9114B drive use? Is it 720k or 1.44 meg?
>
To quote the 1988 HP Catalog "the HP9114B provides up to 710 Kbytes of
formatted capacity in a lightweight, battery-operated package. The 3.5" disk
drive reads, writes and initializes double-sided media in both single-sided
and double-sided formats.
Paxton
Astoria,
Oregon
On March 28, Gene Buckle wrote:
> > > > We all know there's only one real high level language :)
> > >
> > > German?
> >
> > No. Something even more fundamental: Bullshit.
> >
> > Peace... Sridhar
> >
> You bastard. Now I've got Cheeto bits all over my screen. Gah.
He shoots, he scores!
-Dave
--
Dave McGuire "...it's leaving me this unpleasant,
St. Petersburg, FL damp feeling on my shorts..." -Sridhar
The tread about storage tube terminals reminded me that my Tek4014 is in need of
repair...
1) Is it normal that it takes up to 10 minutes to warm up ?
It takes that long on my machine before the clear button actually clears the
screen.
2) and the real problem :
The cursor, existing of a 8x8 dotgrid, often collapses horizontally, i.e. it
becomes (much) smaller.
This is, due to the storage tube technology, repeated in all characters you
then type in.
Any pointers as to where I should start ?
Jos .
Hey, been asked to sort out my folks laptop, so I know nothing of its
past etc.
I noted your thread and thought this maybe interesting,
Their email address keeps getting mail from the "mail demon" notifying
them that their mail (that they did not send) was not delivered to the
address because it contains something that could be a virus.
The mail does point out that the virus attached is called
"sm3song.mp3.scr", but the fun doesn't stop there, however easy it may
seem from this point doesn't cut it.
As I said they get dozens of these mail, and each one says a different
name;
Humour.mp3.scr, hamster.mp3.scr, sm3song.mp3.scr... the most frequently
used one is sm3song.mp3.scr.
The email account, by the way they use outlook express :-(, is set up
for two different email accounts, the one a simple POP3 account through
freeserve, and the other (that I don't understand) through something
called freezone, where their website for my mums business is hosted, and
also works as a server for her mail.
Going back to the mail demon messages; they only represent addresses
(from her contact list) who have sent her mail through the freezone
account that she has not yet replied to.
If any of this seems to be familiar to anyone please email me at
Sanity_not_vanity(a)hotmail.com
I thought maybe the virus is on the freezone server as apposed to the
laptop, also note, the virus does not seem to be doing anything
destructive, nor does it show when I do a complete scan of the hard
drives using the latest versions of PC cillin antivirus.
Andy.
> From: Joe <rigdonj(a)cfl.rr.com>
> I picked one up today. This one is marked "Terminal Printer" and model
MH-4015+ but the FFC ID number says that it's made by Shinwa and it
lappears to be the same as the CPB-136. It's a dot matrix printer and it
has SIX printheads in it!
Six printheads?!? Good grief Joe, how, where, & why do you come up with
all this stuff? And how on earth do you find the time to play with the
stuff once you have it? I still haven't found the time to check out all
the stuff you gave me six months ago . . . really, how do you do it?
Glen
0/0
I have had no problem using Data tapes in my HI8 camcorder. They are the
equivalent to regular 8 mm tapes and give me 240 lines of resolution, not the
400 lines of high 8 resolution.
Mechanically I have had no problems either.
Paxton
Astoria, OR
This hex-width board was found sitting in a UNIBUS backplane. It looks like
it may have more than two PCB layers. The metal handle, where the board
number is usually stamped, is unmarked; no board number is stamped there. On
the front side, top left, is "AD413A MADE IN USA". The top middle had the
"200415-03" handwritten on it, but that has been crossed out by a marker,
and "200850-02" appears beneath it. The top right has "S/N 5781"
handwritten. There are two 50-pin BERG (maybe formatted Pertec) connectors
at the front top. On the back of the board, at the top right, is "MRX42
200255-02", machine printed. A little to the left of that is "3183",
handwritten.
Google has returned nothing. What have I here?
--
Jeffrey Sharp
The email address lists(a)subatomix.com is for mailing list traffic. Please
send off-list mail to roach jay ess ess at wasp subatomix beetle dot com.
You may need to remove some bugs first.
Hello, all:
In mid-April I'm visiting one of my company's branch offices in
Pasadena, CA . I'll only be there for a few days, but I'd like
recommendations as to nearby "computing" things to see. I already booked a
tour of the JPL (not classic but interesting enough :-)).
Any thoughts?
Rich
==========================
Richard A. Cini, Jr.
Congress Financial Corporation
1133 Avenue of the Americas
30th Floor
New York, NY 10036
(212) 545-4402
(212) 840-6259 (facsimile)
I've got what I was told is a BigBoard. Can someone check
out the picture at:
http://www.dittman.net/z80.jpg
and see if you recognize it?
Thanks.
--
Eric Dittman
dittman(a)dittman.net
Check out the DEC Enthusiasts Club at http://www.dittman.net/
On Tue, 26 Mar 2002 18:54:13 -0500 Douglas Quebbeman
<dhquebbeman(a)theestopinalgroup.com> writes:
> I was talking about the DEC BASIC that made BASIC famous,
> the BASIC from TOPS-10 and TOPS-20 on the DECsystem-10.
>
> > VAX BASIC V3.8-000
>
> Looks like some kind of vacuum cleaner to me...
Hey, as far as I'm concerned, it isn't BASIC unless it's
BASIC-PLUS running under RSTS/e.
Sorry, you guys resurrected and old (and very fond)
memory . . .
Jeff
________________________________________________________________
GET INTERNET ACCESS FROM JUNO!
Juno offers FREE or PREMIUM Internet access for less!
Join Juno today! For your FREE software, visit:
http://dl.www.juno.com/get/web/.
As an aside to the current VMS discussion, does anyone know
of an equivalent to the Unix "su -" command for VMS?
Basically I'd like to be able to use my "normal" AL account
for messing about with but occasionally "su" to SYSTEM to get
at a protected file or directory. All the FAQs and manual pages
I've come across so far point to SPAWNing a new process and then
changing the privileges (eg SET PROC/PRIV=SYSPRV), which defeats
the object of the exercise since the "AL" account needs system
privileges in order to do the SET PROC/PRIV in the first place :-)
At the moment I'm using an ST running UNITERM hooked up to a
3100/30's console port so I'm stuck with just the one login session
at a time - occasionally I'd like to be able to flip over to SYSTEM
without having to mess about with logging out of AL and into SYSTEM
and back :-) Any ideas?
Cheers
Al.
From: Eric J. Korpela <korpela(a)ssl.berkeley.edu>
>It also depended upon how the virtual machine was implemented. The
>Apple Pascal virtual machine was horrible. Compiled Pascal programs
>ran slower than their equivalent in interpreted Applesoft BASIC.
I'd agree though it made it possible to run the sources on a Z80 S100 crate,
a trs-80 and an apple and moveing the code around was done with a
simple serial utility (lack of common disk format!).
The best platform other than the microengine was PDP-11, The z80
wasn't too bad (comparable to Cbasic).
Allison
I picked up one of these today from Purdue Salvage. Anyone have any
useful software for it? I might be willing to sell it if anyone's
interested. I was kinda disappointed... out of 6 or so Apple IIe's they
got in, not one had an expansion card besides DiskII, the Z-Card and a
printer interface. Still looking for a SuperSerial card so I can copy
data to it (and a copy of Disk Tools on 5-1/5" floppies for it)
-- Pat
On March 28, Jeffrey Sharp wrote:
> This hex-width board was found sitting in a UNIBUS backplane. It looks like
> it may have more than two PCB layers. The metal handle, where the board
> number is usually stamped, is unmarked; no board number is stamped there. On
> the front side, top left, is "AD413A MADE IN USA". The top middle had the
> "200415-03" handwritten on it, but that has been crossed out by a marker,
> and "200850-02" appears beneath it. The top right has "S/N 5781"
> handwritten. There are two 50-pin BERG (maybe formatted Pertec) connectors
> at the front top. On the back of the board, at the top right, is "MRX42
> 200255-02", machine printed. A little to the left of that is "3183",
> handwritten.
>
> Google has returned nothing. What have I here?
Hmm...got pics?
-Dave
--
Dave McGuire "...it's leaving me this unpleasant,
St. Petersburg, FL damp feeling on my shorts..." -Sridhar
My $0.02:
Grab any known good TEAC FD55 (any model).
FD55B 40 track two sided (does most all 40track formats)
FD55F 80track two sided (not 1.2m capable)
FD55G 80track two sided (does all 80 track formats plus 1.2m)
They are common and decently reliable. With one of the FD55B, FD55G
and an older 3.5" (720/1.44) that gets me most all drive related formats
save for the oddball 5.25" drives (like the 100tpi stuff).
Allison
-----Original Message-----
From: Doc Shipley <doc(a)mdrconsult.com>
To: Classic Computers <classiccmp(a)classiccmp.org>
Date: Thursday, March 28, 2002 11:10 AM
Subject: 5.25" floppy model numbers
> Somebody recently posted a fairly comprehensive list of floppy drive
>model #s with their capacities & base specs. I'd like to grab a few
>not-1.2M drives before we scrap them, but I've misplaced the list.
>Would whoever it was be willing to repost?
>
> Thanks
> Doc
>
Just got one of these bad boys from Pudue for $20 with a RZ26L,
framebuffer card with a 3W3 on it, CDROM, 128M of RAM, KN17 CPU. Is the
RZ26 a 1G drive? And how clock speed is the proc?
I know I made out with a steal - he had no idea what it was :)
What kind of OS's are available besides NetBSD or Linux... Is there a
version of VMS or Ultrix that'll work? Also, I didn't get a keyboard with
it and didn't see one there. What kind of keyboard does it use, and can I
use a serial terminal instead?
Thanks for the help!
-- Pat
