From akang@tum.de Mon Mar 07 09:33:56 1994
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!tum!akang
From: akang@tum.de (Andrei Kang)
Newsgroups: comp.sys.m68k
Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1994Mar07.093356.8167@tum.de>
Date: Mon, 07 Mar 1994 09:33:56 GMT
Organization: Technische Universität München
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Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly.

CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit.
Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'.

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

-- 
Andrei Kang -- Technische Universität München
"Hardware is temporary. The signal survives."

From dmartinez@berkeley.edu Wed Mar 09 13:10:56 1994
Path: ashpoly!cascade!transat!ukc!fennimore!berkeley!dmartinez
From: dmartinez@berkeley.edu (Dmitri Martínez)
Newsgroups: comp.sys.m68k
Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1994Mar09.131056.6047@berkeley.edu>
Date: Wed, 09 Mar 1994 13:10:56 GMT
References: <1994Mar07.093356.8167@tum.de>
Organization: UC Berkeley Department of EECS
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In article <1994Mar07.093356.8167@tum.de>, akang@tum.de (Andrei Kang) writes:
> Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly.
> CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit.

The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space.

PGP Public key available via finger or upon request.

-- 
=== Dmitri Martínez ===
Dept of Electrical Engineering, UC Berkeley Department of EECS
"There are 14 nodes and only 10 countries. Count again."

From dpetrov@uni-hamburg.de Wed Mar 09 23:23:56 1994
Path: ashpoly!cascade!transat!sunet!nordrelay!uni-hamburg!dpetrov
From: dpetrov@uni-hamburg.de (Diego Petrov)
Newsgroups: comp.sys.m68k
Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1994Mar09.232356.3029@uni-hamburg.de>
Date: Wed, 09 Mar 1994 23:23:56 GMT
References: <1994Mar07.093356.8167@tum.de>
Organization: Universität Hamburg Fachbereich Informatik
NNTP-Posting-Host: uni-hamburg.de
X-Newsreader: NewsWatcher 2.0b24
Lines: 10

In article <1994Mar07.093356.8167@tum.de>, akang@tum.de (Andrei Kang) writes:
> Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly.
> CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit.

Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire).

-- 
=== Diego Petrov ===
Dept of Electrical Engineering, Universität Hamburg Fachbereich Informatik
"The carrier frequency does not drift by accident."