From pschneider@unam.mx Sat Mar 18 01:47:31 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!unam!pschneider
From: pschneider@unam.mx (Pavel Schneider)
Newsgroups: comp.sys.m68k
Subject: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Mar18.014731.8531@unam.mx>
Date: Sat, 18 Mar 1995 01:47:31 GMT
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Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project.

At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII.
CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit.

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

-- 
Pavel Schneider
Opinions expressed are solely my own and not those of Universidad Nacional Autónoma de México (DGSCA).
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From flarsson@rwth-aachen.de Sun Mar 19 21:23:31 1995
Path: ashpoly!cascade!brgate!saturno!rwth-aachen!flarsson
From: flarsson@rwth-aachen.de (Fiona Larsson)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Mar19.212331.5272@rwth-aachen.de>
Date: Sun, 19 Mar 1995 21:23:31 GMT
References: <1995Mar18.014731.8531@unam.mx>
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In article <1995Mar18.014731.8531@unam.mx>, pschneider@unam.mx (Pavel Schneider) writes:
> Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project.
> At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII.

That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely.

-- 
Fiona Larsson <flarsson@rwth-aachen.de>
US Robotics Courier V.34 @ 33,600 bps
"They will send a copy in my place."