From mweber@utexas.edu Mon May 13 05:10:13 1996
Path: ashpoly!bigsur!pacrim!krgate!eunha!utexas!mweber
From: mweber@utexas.edu (Mikhail Weber)
Newsgroups: comp.sys.m68k
Subject: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996May13.051013.7120@utexas.edu>
Date: Mon, 13 May 1996 05:10:13 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.

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

-- 
=== Mikhail Weber ===
Dept of Electrical Engineering, University of Texas at Austin
"Hold for relay."

From pduarte@inria.fr Wed May 15 07:45:13 1996
Path: ashpoly!cascade!transat!eunet-de!hansebox!inria!pduarte
From: pduarte@inria.fr (Pavel Duarte)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996May15.074513.4920@inria.fr>
Date: Wed, 15 May 1996 07:45:13 GMT
References: <1996May13.051013.7120@utexas.edu>
Organization: INRIA Rocquencourt
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In article <1996May13.051013.7120@utexas.edu>, mweber@utexas.edu (Mikhail Weber) writes:
> 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.

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

-- 
Pavel Duarte
Opinions expressed are solely my own and not those of INRIA Rocquencourt.
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From aandersson@berkeley.edu Thu May 16 16:25:13 1996
Path: ashpoly!cascade!brgate!saturno!berkeley!aandersson
From: aandersson@berkeley.edu (Aiko Andersson)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996May16.162513.9963@berkeley.edu>
Date: Thu, 16 May 1996 16:25:13 GMT
References: <1996May13.051013.7120@utexas.edu>
Organization: UC Berkeley Department of EECS
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In article <1996May13.051013.7120@utexas.edu>, mweber@utexas.edu (Mikhail Weber) writes:
> Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project.

Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire).

-- 
=== Aiko Andersson ===
Dept of Electrical Engineering, UC Berkeley Department of EECS
"There are 14 nodes and only 10 countries. Count again."

From tandersson@cam.ac.uk Fri May 17 14:01:13 1996
Path: ashpoly!cascade!transat!sunet!nordrelay!cam!tandersson
From: tandersson@cam.ac.uk (Thiago Andersson)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996May17.140113.7987@cam.ac.uk>
Date: Fri, 17 May 1996 14:01:13 GMT
References: <1996May13.051013.7120@utexas.edu> <1996May15.074513.4920@inria.fr>
Organization: University of Cambridge Computer Laboratory
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In article <1996May15.074513.4920@inria.fr>, pduarte@inria.fr (Pavel Duarte) writes:
> The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon.

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

-- 
Thiago Andersson
Opinions expressed are solely my own and not those of University of Cambridge Computer Laboratory.
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