From msokolov@cern.ch Thu Apr 27 14:39:57 1995
Path: ashpoly!cascade!mxgate!coyoacan!cern!msokolov
From: msokolov@cern.ch (Marta Sokolov)
Newsgroups: comp.sys.m68k
Subject: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Apr27.143957.3829@cern.ch>
Date: Thu, 27 Apr 1995 14:39:57 GMT
Organization: European Laboratory for Particle Physics, Geneva
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Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look.

The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank.
CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit.

Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc.

-- 
Marta Sokolov
Opinions expressed are solely my own and not those of European Laboratory for Particle Physics, Geneva.
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From jkang@pipeline.com Sat Apr 29 06:16:57 1995
Path: ashpoly!bigsur!pacrim!jpgate!kamome!pipeline!jkang
From: jkang@pipeline.com (Joachim Kang)
Newsgroups: comp.sys.m68k
Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Apr29.061657.5298@pipeline.com>
Date: Sat, 29 Apr 1995 06:16:57 GMT
References: <1995Apr27.143957.3829@cern.ch>
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In article <1995Apr27.143957.3829@cern.ch>, msokolov@cern.ch (Marta Sokolov) writes:
> Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look.
> The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank.

The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon.

PGP Public key available via finger or upon request.

-- 
Joachim Kang | jkang@pipeline.com
PGP Key fingerprint: 99D9 16C8 8C22 9E6C
"Keep the channels open."

From dduarte@demon.co.uk Sat Apr 29 23:08:57 1995
Path: ashpoly!cascade!transat!ukc!fennimore!demon!dduarte
From: dduarte@demon.co.uk (Dong-hyun Duarte)
Newsgroups: comp.sys.m68k
Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Apr29.230857.5356@demon.co.uk>
Date: Sat, 29 Apr 1995 23:08:57 GMT
References: <1995Apr27.143957.3829@cern.ch> <1995Apr29.061657.5298@pipeline.com>
Organization: Demon Internet Services UK
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In article <1995Apr29.061657.5298@pipeline.com>, jkang@pipeline.com (Joachim Kang) writes:
> The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon.

Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen.

-- 
Dong-hyun Duarte
Opinions expressed are solely my own and not those of Demon Internet Services UK.
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