From mnilsson@uni-hamburg.de Tue Oct 22 23:36:21 1996
Path: ashpoly!cascade!transat!sunet!nordrelay!uni-hamburg!mnilsson
From: mnilsson@uni-hamburg.de (Min-jun Nilsson)
Newsgroups: comp.sys.m68k
Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996Oct22.233621.5896@uni-hamburg.de>
Date: Tue, 22 Oct 1996 23:36:21 GMT
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Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project.

Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'.
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.

-- 
Min-jun Nilsson
Tape trading list upon request. SASE required for international mail.

From esouza@mit.edu Wed Oct 23 02:32:21 1996
Path: ashpoly!cascade!mxgate!coyoacan!mit!esouza
From: esouza@mit.edu (Emi Souza)
Newsgroups: comp.sys.m68k
Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996Oct23.023221.3797@mit.edu>
Date: Wed, 23 Oct 1996 02:32:21 GMT
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In article <1996Oct22.233621.5896@uni-hamburg.de>, mnilsson@uni-hamburg.de (Min-jun Nilsson) writes:
> Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project.

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

-- 
Emi Souza
Opinions expressed are solely my own and not those of Massachusetts Institute of Technology.
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