From tsokolov@uu.net Thu Jul 14 19:07:12 1994
Path: ashpoly!bigsur!pacrim!krgate!eunha!uu!tsokolov
From: tsokolov@uu.net (Tomas Sokolov)
Newsgroups: comp.sys.m68k
Subject: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1994Jul14.190712.3047@uu.net>
Date: Thu, 14 Jul 1994 19:07:12 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.

-- 
=== Tomas Sokolov ===
Dept of Electrical Engineering, UUNET Technologies, Falls Church VA
"Extraordinary claims require extraordinary spectra."

From tnakamura@ox.ac.uk Sat Jul 16 17:47:12 1994
Path: ashpoly!cascade!transat!eunet-de!hansebox!ox!tnakamura
From: tnakamura@ox.ac.uk (Tyler Nakamura)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1994Jul16.174712.7005@ox.ac.uk>
Date: Sat, 16 Jul 1994 17:47:12 GMT
References: <1994Jul14.190712.3047@uu.net>
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In article <1994Jul14.190712.3047@uu.net>, tsokolov@uu.net (Tomas Sokolov) writes:
> 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'.

Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP?

-- 
Tyler Nakamura | tnakamura@ox.ac.uk
PGP Key fingerprint: 19C4 5521 554D 0EA8
"Keep the channels open."

From jkuznetsov@purdue.edu Mon Jul 18 09:10:12 1994
Path: ashpoly!cascade!brgate!saturno!purdue!jkuznetsov
From: jkuznetsov@purdue.edu (Joachim Kuznetsov)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1994Jul18.091012.9101@purdue.edu>
Date: Mon, 18 Jul 1994 09:10:12 GMT
References: <1994Jul14.190712.3047@uu.net> <1994Jul16.174712.7005@ox.ac.uk>
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In article <1994Jul16.174712.7005@ox.ac.uk>, tnakamura@ox.ac.uk (Tyler Nakamura) writes:
> Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP?

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

Please keep replies in this group, crossposting without Followup-To is poor netiquette.

-- 
Joachim Kuznetsov | jkuznetsov@purdue.edu
PGP Key fingerprint: 4451 EBA2 8438 6C2A
"Keep the channels open."