From tvasiliev@mit.edu Sat Oct 28 12:15:03 1995
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From: tvasiliev@mit.edu (Tobias Vasiliev)
Newsgroups: comp.sys.m68k
Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Oct28.121503.9849@mit.edu>
Date: Sat, 28 Oct 1995 12:15:03 GMT
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Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project.

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.

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

-- 
=== Tobias Vasiliev ===
Dept of Electrical Engineering, Massachusetts Institute of Technology
"5 sigma is a discovery. 7 is a question."

From ekang@illinois.edu Sun Oct 29 13:16:03 1995
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From: ekang@illinois.edu (Elaine Kang)
Newsgroups: comp.sys.m68k
Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Oct29.131603.7566@illinois.edu>
Date: Sun, 29 Oct 1995 13:16:03 GMT
References: <1995Oct28.121503.9849@mit.edu>
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In article <1995Oct28.121503.9849@mit.edu>, tvasiliev@mit.edu (Tobias Vasiliev) 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.

-- 
Elaine Kang
Opinions expressed are solely my own and not those of University of Illinois Urbana-Champaign.
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