Relevant to the current lawsuit:
In "A Soul of a New Machine", the author mentions that IBM was pretty
much constantly in court at the time of Data General's beginnings.
Could someone please sum up what was happening at the time?
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Thank you, I will try the drivers and tell you what happens.
What did the hitachi drives look like? Maybe it's actually the same
or almost the same thing
>as the Amdek Laserdrive-1)
>
>The interface was some proprietary subset of SCSI (parallel type). I
have
>some ancient device drivers if you want to screw around with them.
This is
>all 286/DOS3.3-era stuff.
>
>Kai
>
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Sounds like an OEM version of the Hitachi 1502/1503/2500 series (also sold
as the Amdek Laserdrive-1)
The interface was some proprietary subset of SCSI (parallel type). I have
some ancient device drivers if you want to screw around with them. This is
all 286/DOS3.3-era stuff.
Kai
You're right. 6-9 DO go to the DC37. The cable is pretty much
straight through. Any other hints you need?
>
>> OK, I finally brought the thing home.
>> The 37 pin connector is wired as follows:
>> Pins 1-17 are the only ones attached to something
>> It's fairly difficuly to trace, the traces keep switching
>> sides of the board and stuff...
>> 1-4 are wired to 2-5 of 74LS245, then go on to 2-5 of 74LS541
>
>Sounds like half of an 8-bit data bus. Where do 6-9 of the '245 go to?
>(the DC37 connector, I'll bet).
>
>How is the cable wired? In other words, where do these data pins end up
>on the drive end?
>
>> Some others as well, I'll give you the exact pins if you want.
>> The 8255-AC5 is mostly attached to the above-listed chips.
>>
>> The drive box is a DATEXT Model DTX-10, released April 1986.
>> Inside, it has the drive itself, and two 9" X 9" boards. The bottom
>> one seems to be simply hardware stuff - nothing but resistors,
>> amplifiers, etc. The top one is the one with the centronics
>> connector. It has 12 TC40H***P chips. Also, some 74LS***P chips.
>
>40Hxxxx are high speed 4000-series CMOS, I think, normally from
Toshiba.
>
>> Also, there are two huge chips, 60-pin or something. These are
>> HD61Z002 and HD63701XOP. All chips are Hitachi-labelled. There is
also
>
>I think the 63701 is a microcontroller of some kind. No idea on the
other
>one, alas.
>
>> a 34.5774 MHz crystal. Lastly, an EPROM w/the window covered over.
>> I hope it's OK that I lifted the tape. It's MBM2732A-30. The only
>
>That shouldn't have done it any harm, but keep sunlight off the chip
(at
>least unitl you've backed it up).
>
>-tony
>
>
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OK, I finally brought the thing home.
The 37 pin connector is wired as follows:
Pins 1-17 are the only ones attached to something
It's fairly difficuly to trace, the traces keep switching
sides of the board and stuff...
1-4 are wired to 2-5 of 74LS245, then go on to 2-5 of 74LS541
Some others as well, I'll give you the exact pins if you want.
The 8255-AC5 is mostly attached to the above-listed chips.
The drive box is a DATEXT Model DTX-10, released April 1986.
Inside, it has the drive itself, and two 9" X 9" boards. The bottom
one seems to be simply hardware stuff - nothing but resistors,
amplifiers, etc. The top one is the one with the centronics
connector. It has 12 TC40H***P chips. Also, some 74LS***P chips.
Also, there are two huge chips, 60-pin or something. These are
HD61Z002 and HD63701XOP. All chips are Hitachi-labelled. There is also
a 34.5774 MHz crystal. Lastly, an EPROM w/the window covered over.
I hope it's OK that I lifted the tape. It's MBM2732A-30. The only
big chip on the bottom board is an HA12049A. I hope this gives you
some idea. I have a VOM and a poorly working 'scope if you need
any of that to figure this out
>
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I just wanted to send the list a note, letting everyone know my
appreciation to Anthony Clifton (Wirehead) for a great transaction
this last weekend. He welcomed me into his home after 11:00pm while I
was passing through en route to Chicago (and Milwaukee and
Minneapolis!), for a great deal. I picked up TRS-80, Commodore, etc.,
hardware and software, many printers, and other goodies he threw in
for my efforts--- plus a great price.
If you have the chance to deal with Mr. Clifton, take it!
CORD G. COSLOR
--
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OK, that's a new one on me...
What's a Kenback. (I hope it's not similar to a henweigh!)
Jon
>Does anyone here know if Spacewar was ever ported to the Kenback, Mark-8 or
Altair 8800? Any information on early games for these machines (even ports
of basic games like Advent) would be very enlightening...
>
>Many thanks,
>
>van
>........................................................................
>
> @
> /
> / Shift Lever
> (D)/
>\===================================== @ ================ Floor Plan ===
>BNL |- - -Phase Shifter- - - -|--/ Get Wired!
>- ------------]=[]@----------------------@ 415.276.4979
>Trans- ] ]](A) Toll Free 1.888.208.6655 (B) ? (C) Rear Connection
>mission ]]]]]]]]]]]]Driveshaft]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]
> ] ]]
>71 ------------] web superstation of the stars...
>van burnham http://www.futuraworld.com
>production manager
>wired 520 third street fourth floor san francisco ca 94107 united states
>........................................................................
>for immediate emergency wireless access send email to van-page(a)wired.com
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>
>
-----Original Message-----
From: Max Eskin [SMTP:maxeskin@hotmail.com]
Sent: Sunday, May 17, 1998 6:26 PM
To: Discussion re-collecting of classic computers
Subject: MIT flea
I only managed to go there for 50min. and only found out about a
west end when I left. It was cheaper than last time though. I bought
nothing. THe things I saw that were of interest, however:
A Xerox machine that looked like a PC clone, but the monitor plugged
into the system unit with a wide ribbon-like cable, very crude-
looking. What was this?
Sounds like an 820 or a 16/8; both of them have large flat ribbon cables that connect to the drive housing. The system unit is actually the monitor assembly, that's where the motherboard and memory is. The drives (rigid, floppy, or both) are housed in a separate unit with it's own power supply. If you think that vonnection looks crude, you ought to see how the centronic printer connector is hooked up....with the same flat ribbon cable and the user had to go inside the monitor housing to install it. Very crude indeed...not at all Plug and Play!!! Just as a matter of curiousity, how much were they asking for it?
Kirk Scott
scottk5(a)ibm.net
