From mtakahashi@kiae.su Tue Jan 02 11:26:44 1996
Path: ashpoly!bigsur!pacrim!krgate!eunha!kiae!mtakahashi
From: mtakahashi@kiae.su (Mateo Takahashi)
Newsgroups: comp.sys.m68k
Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996Jan02.112644.1019@kiae.su>
Date: Tue, 02 Jan 1996 11:26:44 GMT
Organization: Kurchatov Institute of Atomic Energy, Moscow
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Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly.

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.

-- 
Mateo Takahashi -- Kurchatov Institute of Atomic Energy, Moscow
"A soul is not exclusive to biology."

From aduarte@cmu.edu Thu Jan 04 10:20:44 1996
Path: ashpoly!cascade!transat!ukc!fennimore!cmu!aduarte
From: aduarte@cmu.edu (Aiko Duarte)
Newsgroups: comp.sys.m68k
Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996Jan04.102044.3529@cmu.edu>
Date: Thu, 04 Jan 1996 10:20:44 GMT
References: <1996Jan02.112644.1019@kiae.su>
Organization: Carnegie Mellon University School of CS
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In article <1996Jan02.112644.1019@kiae.su>, mtakahashi@kiae.su (Mateo Takahashi) writes:
> Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly.

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

-- 
=== Aiko Duarte ===
Dept of Electrical Engineering, Carnegie Mellon University School of CS
"Hold for relay."

From gsilva@earthlink.net Fri Jan 05 23:59:44 1996
Path: ashpoly!cascade!mxgate!coyoacan!earthlink!gsilva
From: gsilva@earthlink.net (Göran Silva)
Newsgroups: comp.sys.m68k
Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996Jan05.235944.2486@earthlink.net>
Date: Fri, 05 Jan 1996 23:59:44 GMT
References: <1996Jan02.112644.1019@kiae.su>
Organization: EarthLink Network
NNTP-Posting-Host: earthlink.net
X-Newsreader: TIN [version 1.2 PL2]
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In article <1996Jan02.112644.1019@kiae.su>, mtakahashi@kiae.su (Mateo Takahashi) writes:
> Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly.

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

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

-- 
Göran Silva -- EarthLink Network
"Measuring a record you own is listening, not piracy."