Found a stack of AT&T computers. Some are labelled "PC 6300" (The unix PC,
iirc?) but others are marked "6300 WGS", a designation I've not heard of
before. In any case, is anyone interested in them? They're available at a
good price. Condition unknown, possible monitors/keyboards, but dunno.
Lemme know if I should pick 'em up.
--------------------------------------------------------------------- O-
Uncle Roger "There is pleasure pure in being mad
roger(a)sinasohn.com that none but madmen know."
Roger Louis Sinasohn & Associates
San Francisco, California http://www.sinasohn.com/
<Does anyone know of a *cheap* source of a VGA-compatible display? What I
<looking for, especially, is low power usage, followed by compactness and
<portability. Thanks!
I'm also interested in same and know someone that might like info.
There is a truck load of applications for a cheap/compact/lowpower
VGA display.
Allison
+AD4-Did MP/M run on Z-80s? BTW, is there a reasonable chance the CP/M on
+AD4-one micro w/5.25+ACI- disks be compatible with another with 5.25+ACI- disks,
+AD4-i.e. my apple with a C-128? Also, if a computer can run CP/M 3 can it
+AD4-run eariler versions? (Note i'm not talking about apps here).
Yes, MP/M ran on the Z80 first, then on the 8086. A multi-user Z80
was no speed demon but it was cheap compared to a PDP-11. BTW, the
very first initial release of MP/M was actually coded for 8080, the
task dispatcher did not save the extra Z80 registers. I discovered it
the hard way, reported it to DRI, they fixed it right away.
Apparently whatever machine they used to test MP/M was 8080 or 8085
based.
Compatibility on floppies was about nil, very very few disks could be
moved from one machine to another. If anything, 5.25+ACI- compatibility
was worse than 8+ACI- floppies.
Any Z80 machine that could run V3 had all the hardware needed to run
V2. CP/M V1 was designed only for 8+ACI- SSSD floppies, the BIOS didn't
have the drive tables in it to support anything else.
Jack Peacock
I Remember a Computer Shopper (you know, back when there ware actually a few
decent articles in it, as well as a ton of advertising) referred to those Mac
Clones as 'HackIntoshes' Sounds appropriate to me...
> From: "Zane H. Healy" <healyzh(a)ix.netcom.com>
> Subject: Re: Early Mac Clones
>
> >bit hard getting a mac into a pc case though, remember that macs have all
> >the connectors on board,
> >
> >desie
>
> Can't be any worse than the people that put Atari's or Amiga's in a PC
> case. I've seen a Atari TT030 in a PC Tower, and it's quite popular among
> Amiga people to tower their A1200's. All it takes is some creative cabling.
>
> Zane
I have a set of texts on making a "Tower 64" (bundling a Commodore 64, Ram
Expansion, drives, etc. in a tower PC case) which I have been seriously
considering, actually I think I'd prefer a Tower 128 myself.
Larry
--
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
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
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This is somewhat tangential, but I suspect whoever is
reading about HP Apollo's may be able to contribute.
I came across a rack mount system in the local surplus
store. The faceplate reads "HP 2100c Programmable
Microcomputer System".
Any ideas what this is? Worth picking up?
Jon
>>
>> <I got a apollo 4500.
>> <It has a 68030 inside, and a 700-someodd meg MFM (?) harddisk.
>>
>> More likely SCSI (single 50pin cable) or EDSI (two cables like MFM).
>> MFM drives topped out at 160mb or so, EDSI went to at least 400mb maybe
>> higher.
>
>Definitely ESDI or SCSI. Although they could have had SMD or ESMD
>as well.
>
>>
>> <I have no idea what it runs. This one has a SummaSketch pad with it.
>> <It was used for CAD stuff.
>>
>> Some kind of unix.
>
>Possibly, though the Apollo's ran Domain/OS which was Multics inspired
>but later it went to BSD compatibility and looked like both Unix and
>Multics.
>
>>
>> Allison
>>
>>
>
>Actually, there are a lot of Apollo collectors out there and the video
>card may be getable. The Apollos used 3C505's for ethernet and some other
>Token ring interface.
>
>Bill
>
>+---------------------------------------------------------------------------+
>| Bill/Carolyn Pechter | 17 Meredith Drive | Tinton Falls, New Jersey 07724 |
>| 908-389-3592 | Save computing history, give an old geek old hardware. |
>| pechter(a)shell.monmouth.com |
>+---------------------------------------------------------------------------+
>
Did MP/M run on Z-80s? BTW, is there a reasonable chance the CP/M on
one micro w/5.25" disks be compatible with another with 5.25" disks,
i.e. my apple with a C-128? Also, if a computer can run CP/M 3+ can it
run eariler versions? (Note i'm not talking about apps here).
>OK to fair. ;) It was file level password protection and required the
>whole colume to be enabled for it. Security level was low though. If
the
>user could assemble and run a program they could write code to access
the
>disk directory and toggle the right bits and they had control. It was
>aimed at captive applications where the user had limited resources and
>could not get directly at the file system. Many of the things in CPM3
>are there to provice more direct compatability with MP/M.
>
>As to weird, no most of the additions they did were similar to the ZCPR
>groups and other were doing in parallel and had sound basis.
>
>Allison
>
>
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<I got a apollo 4500.
<It has a 68030 inside, and a 700-someodd meg MFM (?) harddisk.
More likely SCSI (single 50pin cable) or EDSI (two cables like MFM).
MFM drives topped out at 160mb or so, EDSI went to at least 400mb maybe
higher.
<I have no idea what it runs. This one has a SummaSketch pad with it.
<It was used for CAD stuff.
Some kind of unix.
<The problem with it is, the video card appears to have died.
<WHen I power the machine on (It has a VERY LARGE [21"] RGB monitor. Any
<chance of me connecting it to a PC? It has 3 plugs, R G B, and expects
<sync on green) and the monitor, I get garbage. The garbage is the same a
it can be but I forget the modes required also you need a cable for it.
Connecting to a PC is more trouble than its worth generally.
Allison
Max, Please clip off the unwanted parts of the message.
<><The CP/M 3+ manual says the syntax is drive:12345678.123;password.
<><Maybe it's a weird DR thing. They tended to add weird stuff...
<
<So, how DID it work?
OK to fair. ;) It was file level password protection and required the
whole colume to be enabled for it. Security level was low though. If the
user could assemble and run a program they could write code to access the
disk directory and toggle the right bits and they had control. It was
aimed at captive applications where the user had limited resources and
could not get directly at the file system. Many of the things in CPM3
are there to provice more direct compatability with MP/M.
As to weird, no most of the additions they did were similar to the ZCPR
groups and other were doing in parallel and had sound basis.
Allison
So, how DID it work?
>
>Password protection? There wasn't any as part of CP/M.
><The CP/M 3+ manual says the syntax is drive:12345678.123;password.
><Maybe it's a weird DR thing. They tended to add weird stuff...
>
>You didn't say CPM3! If you say CPM it is assumed the more common v2.x
>version. V2.x did not have passwords, V3.0 did. Obviously if this
apple
>cpm card has V3 disks it it was a very late one or someone went to some
>trouble to port v3 to it. FYI: v3 was not widely popular.
>
>Allison
>
>
>
>
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