From pkang@unam.mx Mon Jan 03 09:01:35 1994
Path: ashpoly!cascade!mxgate!coyoacan!unam!pkang
From: pkang@unam.mx (Pavel Kang)
Newsgroups: comp.sys.m68k
Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1994Jan03.090135.9196@unam.mx>
Date: Mon, 03 Jan 1994 09:01:35 GMT
Organization: Universidad Nacional Autónoma de México (DGSCA)
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Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly.

Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'.
The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank.

One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket?

-- 
Pavel Kang | pkang@unam.mx
PGP Key fingerprint: 5578 0A5C 0657 6FE5
"Keep the channels open."

From agonzalez@illinois.edu Mon Jan 03 23:05:35 1994
Path: ashpoly!cascade!transat!eunet-fr!teletel!illinois!agonzalez
From: agonzalez@illinois.edu (Astrid González)
Newsgroups: comp.sys.m68k
Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1994Jan03.230535.3081@illinois.edu>
Date: Mon, 03 Jan 1994 23:05:35 GMT
References: <1994Jan03.090135.9196@unam.mx>
Organization: University of Illinois Urbana-Champaign
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In article <1994Jan03.090135.9196@unam.mx>, pkang@unam.mx (Pavel Kang) writes:
> Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly.

Tom from Ashford Poly owns the physical board! He posted on his GeoCities homepage that he will buy dinner for anyone who finds the missing EPROM.

-- 
=== Astrid González ===
Dept of Electrical Engineering, University of Illinois Urbana-Champaign
"In theory there is no difference between theory and practice."