Hi,
The boards I have are:
assy pn40827-05 rev-6 (has 3 82s181 proms on top edge)
assy 40505 rev-C (has crystal and berg connector on top)
Building a cpu is anything but practical... why should modding
this? ;)
Allison
-----Original Message-----
From: Loboyko Steve <sloboyko_at_yahoo.com>
To: classiccmp_at_classiccmp.org <classiccmp_at_classiccmp.org>
Date: Friday, April 05, 2002 1:47 AM
Subject: Re: Core Memory Interfacing?
>
>I have the Xerox Hytype II service manual with
>schematics of the infamous Logic I and II boards,
>several versions. Let me know the Board #'s and etch
>and if I got 'em, I can scan them. I used to repair
>these printers (mostly at a board level) in a previous
>life.
>
>I don't know if making them into your own CPU would be
>practical but there sure is a lot to learn on these
>two boards...even now.
>
>--- "Peter C. Wallace" <pcw_at_mesanet.com> wrote:
>> On Thu, 4 Apr 2002, ajp166 wrote:
>>
>> > From: Peter C. Wallace <pcw_at_mesanet.com>
>> > >
>> > >Hytype IIs also use a 8 bit TTL based microcoded
>> machine (IICRC they use
>> > >74LS283 adders, 74LS170 register file chips,
>> along with bipolar
>> > PROMS)...
>> > >
>> >
>> >
>> > I have a few of those boards... Wich I had the
>> correct prints for the
>> > board numbers
>> > I do have. Could be fun to bend them into a
>> general purpose 8bitter.
>> >
>> > Allison
>> >
>> >
>> >
>>
>> I remember playing with that idea many many years
>> ago. I dont think it has
>> much of an address range though...
>>
>>
>>
>> Peter Wallace
>>
>
>
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Received on Thu Apr 04 2002 - 19:36:17 BST