From slaurent@pacbell.net Sat Sep 14 19:57:36 1996
Path: ashpoly!cascade!brgate!saturno!pacbell!slaurent
From: slaurent@pacbell.net (Sergei Laurent)
Newsgroups: comp.sys.m68k
Subject: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996Sep14.195736.9424@pacbell.net>
Date: Sat, 14 Sep 1996 19:57:36 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.

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

-- 
Sergei Laurent
Tape trading list upon request. SASE required for international mail.

From neriksson@berkeley.edu Mon Sep 16 15:16:36 1996
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!berkeley!neriksson
From: neriksson@berkeley.edu (Nadine Eriksson)
Newsgroups: comp.sys.m68k
Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996Sep16.151636.6270@berkeley.edu>
Date: Mon, 16 Sep 1996 15:16:36 GMT
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In article <1996Sep14.195736.9424@pacbell.net>, slaurent@pacbell.net (Sergei Laurent) writes:
> Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project.

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

-- 
Nadine Eriksson | neriksson@berkeley.edu
PGP Key fingerprint: 386D 54A2 AF37 A362
"Keep the channels open."