From lgarcia@kiae.su Sun Sep 11 04:44:54 1994
Path: ashpoly!cascade!transat!eunet-de!hansebox!kiae!lgarcia
From: lgarcia@kiae.su (Lars García)
Newsgroups: comp.sys.m68k
Subject: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1994Sep11.044454.1245@kiae.su>
Date: Sun, 11 Sep 1994 04:44:54 GMT
Organization: Kurchatov Institute of Atomic Energy, Moscow
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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.
Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'.

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

-- 
Lars García | lgarcia@kiae.su
PGP Key fingerprint: 8495 115D 8CFD 438E
"Keep the channels open."

From akarlsson@pipeline.com Tue Sep 13 08:07:54 1994
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pipeline!akarlsson
From: akarlsson@pipeline.com (Andrei Karlsson)
Newsgroups: comp.sys.m68k
Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1994Sep13.080754.3079@pipeline.com>
Date: Tue, 13 Sep 1994 08:07:54 GMT
References: <1994Sep11.044454.1245@kiae.su>
Organization: The Pipeline Internet Network
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In article <1994Sep11.044454.1245@kiae.su>, lgarcia@kiae.su (Lars García) writes:
> Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project.

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

Top-posters will be placed in my ~/.killfile without notice.

-- 
Andrei Karlsson
Tape trading list upon request. SASE required for international mail.

From tvasiliev@unam.mx Tue Sep 13 18:04:54 1994
Path: ashpoly!cascade!transat!eunet-de!hansebox!unam!tvasiliev
From: tvasiliev@unam.mx (Thiago Vasiliev)
Newsgroups: comp.sys.m68k
Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1994Sep13.180454.8280@unam.mx>
Date: Tue, 13 Sep 1994 18:04:54 GMT
References: <1994Sep11.044454.1245@kiae.su>
Organization: Universidad Nacional Autónoma de México (DGSCA)
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In article <1994Sep11.044454.1245@kiae.su>, lgarcia@kiae.su (Lars García) writes:
> Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project.

Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop.

-- 
Thiago Vasiliev
Opinions expressed are solely my own and not those of Universidad Nacional Autónoma de México (DGSCA).
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