>I was digging through some S-100 cards and came upon a Godbout active
>terminator. Do all S-100 buses require external termination, or did
more
>have it built into the mobo? Specifically, do I need to stick this
card
>into my IMSAI?
>
It depends on what kind of motherboard you have. Typically, the
terminator was at the end opposite where the front panel or CPU card
plugged in. Early S-100 motherboards ran at only 2 Mhz (8080 CPU) or
2.5 Mhz (early Z-80) so termination wasn't quite so important. Later,
when speeds were pushed past 4Mhz the terminator became crucial to
reliability. Look at the back end of your motherboard, if you don't
see an array of resistors, about 90 or so, then put the Godbout board
in the very last slot, and your CPU card as close as possible to the
front slot, right behind the front panel.
I used one when I went to 4Mhz on the original 22 slot IMSAI
motherboard, it does help. After the IMSAI MB wore out I switched to
Thinkertoys and Godbout (later called Compupro) motherboards, they had
the terminator built in.
Jack Peacock
Picked up a nice little HP Series 100 Model 120 45600A and a few hundred
other numbers on the bottom... Anyways, it's a very interesting model.
Works fine, has two DB-25 ports(modem and printer, both serial?) and an
HP-IB port, and uses two small batteries that look like N size or close to
that. And a cute keyboard, lotso keys but very small. Anyways... Does
anyone know anything about it? I couldn't find anything on HP's web site,
and nothing showed up immediatley on web searches. What kind of terminal is
it? Are the ports normal RS-232? What does the HP-IB port do, and how do I
access it? So many questions... Too bad there was no manual. But then what
do you expect for $5? At least I got a keyboard...
--------------------------------------------------------------
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| Orham(a)qth.net list admin KD7BCY |
--------------------------------------------------------------
An RD54 is an oem version of the Maxtor 2190 disk drive. You might have
better luck looking for specs on that drive. AFAIK it is identical to
the RD54 except for the label DEC puts on it.
Jack Peacock
-----Original Message-----
From: emanuel stiebler [mailto:emu@ecubics.com]
Sent: Friday, July 24, 1998 10:00 AM
To: Discussion re-collecting of classic computers
Subject: ST506 & RD54
Hi all,
Where on the net, i could find the ST506 specification, or something
like a
RD54 OEM-Manual ?
thanks,
emanuel
John Rollins <rexstout(a)uswest.net> wrote:
> Picked up a nice little HP Series 100 Model 120 45600A and a few hundred
It's sort of a successor to the 125 and predecessor to the 150. It's
an HP2382 "Shadow" terminal housing with a CP/M computer (I think a
Z80 but I can't recall for sure) inside.
The HP-IB port would be used to connect to an external disc drive,
just like on a 150 and using pretty much the same 91xx disc drives. I
think I remember using one with a 9121D? -- the one with two
single-sided stiffies.
I can't recall whether it will play terminal without CP/M. I do
remember that in order to get it to play block-mode capable terminal
(so it could be used with View aka V/3000 aka VPLUS/3000) it needed
to boot CP/M and run a program, and vaguely recall that it could be
a not-block-mode-capable terminal without that program (and maybe
without loading CP/M).
One other thing I recall about it is that it had a precursor to PAM
(Personal Application Manager -- a primitive shell/application
launcher that later turned up on the 150, 110, some HP9000s, and the
Vectra) that was autostarted by CP/M immediately following boot. It
used function keys to start the applications, so you could only have
seven or eight defined for it to start.
The RS232 ports are probably DB25S connectors and I think they look
like DTE -- similar pinout to an IBM PC async card with a DB25P.
-Frank McConnell
Here is a message that I received today, I forward it to all you fellow
Commodore enthusiasts, if you are interested in some nice PET stuff (keep me
in mind for PET books and software, will ya?)
> Subject: PET disposal
> Date: Fri, 24 Jul 1998 11:05:38 -0600
> From: Sjoerd Schaafsma <rocklake(a)telusplanet.net>
> Reply-To: rocklake(a)agt.net
>Organization: University of Lethbridge
> To: foxnhare(a)goldrush.com
>
> HI Larry,
>
> I'm in Lethbridge Alberta, and would like to dispose of a few PETs,
> 4032, 8032, and disk drives, I just can't bring myself to junk 'em.
> Know of any interested parties?
>
>
--
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
Larry Anderson - Sysop of Silicon Realms BBS (300-2400bd) (209) 754-1363
Visit my Commodore 8-Bit web page at:
http://www.goldrush.com/~foxnhare/commodore.html
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
> From: "Sie Raybould" <sie(a)systemfile.demon.co.uk>
> Subject: WTB: Jupiter Ace
>
> Anyone got a Jupiter Ace they'd be prepared to part with ?
>
> Sie
I just was reading in a book about a sinclair ROM replacement for FORTH that
sounds alot like the Jupiter Ace's features. Multi-task up to four programs,
etc. It was referred to the "FORTH in ROM by David Husband". Hope that helps any.
--
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
Larry Anderson - Sysop of Silicon Realms BBS (300-2400bd) (209) 754-1363
Visit my Commodore 8-Bit web page at:
http://www.goldrush.com/~foxnhare/commodore.html
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
Hi guys,
I just picked up a bunch of IBM power supplies at auction. The
auctioneer says they're for the 5140, but I don't know how you could tell.
They're all appear to be brand new and are in the original boxes. The
box is labeled "P/N 2684220", the Power supply "P/N 2684292". Output is
15v, 2.7A.
Anybody know what they're for? And if anybody wants one, the price is $5
shipped, each.
Tom Owad
--
Sysop of Caesarville Online
Client software at: <http://home.earthlink.net/~tomowad/>
I just got a funny cartridge for the early Commodore PC-10 and PC-20 series
computers. There 2 connectors, one plugs into the modem port and the other
into the printer port. Then power up the machine and a 2 digit alpha/numeric
HEX LED displays the problem. Commodore #380025-01.
Anyone have any info on this?
Rich Cini/WUGNET <nospam_rcini(a)msn.com>
- ClubWin/CW6
- MCP Windows 95/Windows Networking
- Preserver of "classic" computers
<<<< ========== reply separator ========== >>>>>
< Of course, this is a bit of a problem for people like me, who are too
< young for an IMSAI, never mind a PDP8
How is this a problem? You learned how to run a PC, programming a PDP-8
is at least an order of magnitude simpler. Seriously, the instruction
set and archetecture is so simple it's downright inviting. The DG Novas
are pretty straight forward too. The old machines didn't have to be huge,
complex or networked. They only had to work.
Allison
< Can I make use of the Centronics interface?
Yes with any current printer just like a PC, though the connector may be
different.
<What type of 'serial car' do you recommend?
Toyota, I've had good luck. Oh sorry, serial card, what ever you have or
can get. Jamco still sells apple][ cards and stuff.
< Can I use my Apple //c w/serial port but w/o CP/M?
Sure!
< >Apple ][ disks don't use standard FM or MFM encoding, so Macs and PCs
< can't
< >read them. If you can find a serial car for the Apple, the easiest wa
< >would be to get a copy of Kermit-65 (for DOS 3.3 files) and/or Kermit8
< >(for CP/M) and transfer the files over a serial link -- that's what I
or MDM, or one of a dozen others for each OS.
< >Kermit-65 comes with instructions on how to get it into an Apple that
< >doesn't already have any kind of file transfer software, and IIRC
< Kermit80
< >has some similar instructions. You can get Kermit by anonymous ftp
< from
< >ftp.columbia.edu, or http://www.columbia.edu/kermit/, or from any of
< >several mirror sites.
Kermit is well known and supported by most PC transfer programs.
Max, get an editor. Either that or don't use LYNX for mail, try elm or
pine.
Allison
