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 ]
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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/
