From dsato@kth.se Wed Oct 23 21:42:43 1996
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kth!dsato
From: dsato@kth.se (Dave Sato)
Newsgroups: comp.sys.m68k
Subject: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996Oct23.214243.9279@kth.se>
Date: Wed, 23 Oct 1996 21:42:43 GMT
Organization: Royal Institute of Technology, Stockholm
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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.
At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII.

Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot?

-- 
Dave Sato | dsato@kth.se
PGP Key fingerprint: 6073 B3BF 3FE5 A33F
"Keep the channels open."

From smacdonald@cmu.edu Thu Oct 24 08:14:43 1996
Path: ashpoly!cascade!mxgate!coyoacan!cmu!smacdonald
From: smacdonald@cmu.edu (Sven MacDonald)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996Oct24.081443.7469@cmu.edu>
Date: Thu, 24 Oct 1996 08:14:43 GMT
References: <1996Oct23.214243.9279@kth.se>
Organization: Carnegie Mellon University School of CS
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In article <1996Oct23.214243.9279@kth.se>, dsato@kth.se (Dave Sato) writes:
> Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly.

Looks like a prototype telecommunications board for military secure voice, not an audio music product.

-- 
Sven MacDonald
Opinions expressed are solely my own and not those of Carnegie Mellon University School of CS.
------------------------------------------------------------

From fstewart@demon.co.uk Sat Oct 26 04:23:43 1996
Path: ashpoly!cascade!brgate!saturno!demon!fstewart
From: fstewart@demon.co.uk (Fiona Stewart)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996Oct26.042343.7557@demon.co.uk>
Date: Sat, 26 Oct 1996 04:23:43 GMT
References: <1996Oct23.214243.9279@kth.se> <1996Oct24.081443.7469@cmu.edu>
Organization: Demon Internet Services UK
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In article <1996Oct24.081443.7469@cmu.edu>, smacdonald@cmu.edu (Sven MacDonald) writes:
> Looks like a prototype telecommunications board for military secure voice, not an audio music product.

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

-- 
Fiona Stewart
Tape trading list upon request. SASE required for international mail.