From mduarte@uni-hamburg.de Sun Nov 26 01:22:51 1995
Path: ashpoly!cascade!transat!ukc!fennimore!uni-hamburg!mduarte
From: mduarte@uni-hamburg.de (Marta Duarte)
Newsgroups: comp.sys.m68k
Subject: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Nov26.012251.4165@uni-hamburg.de>
Date: Sun, 26 Nov 1995 01:22:51 GMT
Organization: Universität Hamburg Fachbereich Informatik
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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.

-- 
Marta Duarte
Opinions expressed are solely my own and not those of Universität Hamburg Fachbereich Informatik.
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From tsilva@titech.ac.jp Sun Nov 26 13:43:51 1995
Path: ashpoly!cascade!transat!eunet-fr!teletel!titech!tsilva
From: tsilva@titech.ac.jp (Takeshi Silva)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Nov26.134351.8260@titech.ac.jp>
Date: Sun, 26 Nov 1995 13:43:51 GMT
References: <1995Nov26.012251.4165@uni-hamburg.de>
Organization: Tokyo Institute of Technology Computer Centre
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In article <1995Nov26.012251.4165@uni-hamburg.de>, mduarte@uni-hamburg.de (Marta Duarte) 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).

-- 
Takeshi Silva
Tape trading list upon request. SASE required for international mail.

From schoi@rwth-aachen.de Sun Nov 26 14:45:51 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!rwth-aachen!schoi
From: schoi@rwth-aachen.de (Sven Choi)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Nov26.144551.7579@rwth-aachen.de>
Date: Sun, 26 Nov 1995 14:45:51 GMT
References: <1995Nov26.012251.4165@uni-hamburg.de>
Organization: RWTH Aachen Informatik
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In article <1995Nov26.012251.4165@uni-hamburg.de>, mduarte@uni-hamburg.de (Marta Duarte) 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'.

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

-- 
Sven Choi -- RWTH Aachen Informatik
"The hatch is open. Is anyone listening?"

From dhernandez@uu.net Tue Nov 28 14:48:51 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uu!dhernandez
From: dhernandez@uu.net (Diego Hernández)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Nov28.144851.4595@uu.net>
Date: Tue, 28 Nov 1995 14:48:51 GMT
References: <1995Nov26.012251.4165@uni-hamburg.de> <1995Nov26.134351.8260@titech.ac.jp>
Organization: UUNET Technologies, Falls Church VA
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In article <1995Nov26.134351.8260@titech.ac.jp>, tsilva@titech.ac.jp (Takeshi Silva) writes:
> Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire).

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

-- 
Diego Hernández
Opinions expressed are solely my own and not those of UUNET Technologies, Falls Church VA.
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