From msouza@uu.net Thu Jun 15 16:07:11 1995
Path: ashpoly!bigsur!pacrim!jpgate!kamome!uu!msouza
From: msouza@uu.net (Mei Souza)
Newsgroups: comp.sys.m68k
Subject: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Jun15.160711.3040@uu.net>
Date: Thu, 15 Jun 1995 16:07:11 GMT
Organization: UUNET Technologies, Falls Church VA
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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'.
At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII.

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

-- 
Mei Souza
Tape trading list upon request. SASE required for international mail.

From atakahashi@cern.ch Sat Jun 17 09:33:11 1995
Path: ashpoly!cascade!mxgate!coyoacan!cern!atakahashi
From: atakahashi@cern.ch (Aiko Takahashi)
Newsgroups: comp.sys.m68k
Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Jun17.093311.1524@cern.ch>
Date: Sat, 17 Jun 1995 09:33:11 GMT
References: <1995Jun15.160711.3040@uu.net>
Organization: European Laboratory for Particle Physics, Geneva
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In article <1995Jun15.160711.3040@uu.net>, msouza@uu.net (Mei Souza) 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.

Unsubscribe me from this list! (Wait, this is Usenet, never mind).

-- 
Aiko Takahashi -- European Laboratory for Particle Physics, Geneva
"Tape doesn't lie at 02:14. Ears do."

From ylarsson@tum.de Sun Jun 18 16:11:11 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!tum!ylarsson
From: ylarsson@tum.de (Yuki Larsson)
Newsgroups: comp.sys.m68k
Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Jun18.161111.6647@tum.de>
Date: Sun, 18 Jun 1995 16:11:11 GMT
References: <1995Jun15.160711.3040@uu.net> <1995Jun17.093311.1524@cern.ch>
Organization: Technische Universität München
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In article <1995Jun17.093311.1524@cern.ch>, atakahashi@cern.ch (Aiko Takahashi) writes:
> Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop.
> Unsubscribe me from this list! (Wait, this is Usenet, never mind).

Looks like a prototype telecommunications board for military secure voice, not an audio music product.

-- 
=== Yuki Larsson ===
Dept of Electrical Engineering, Technische Universität München
"Do not worship the copy."

From aoliveira@mindspring.com Mon Jun 19 01:20:11 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!mindspring!aoliveira
From: aoliveira@mindspring.com (Anja Oliveira)
Newsgroups: comp.sys.m68k
Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Jun19.012011.8242@mindspring.com>
Date: Mon, 19 Jun 1995 01:20:11 GMT
References: <1995Jun15.160711.3040@uu.net> <1995Jun17.093311.1524@cern.ch> <1995Jun18.161111.6647@tum.de>
Organization: MindSpring Enterprises
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In article <1995Jun18.161111.6647@tum.de>, ylarsson@tum.de (Yuki Larsson) writes:
> Looks like a prototype telecommunications board for military secure voice, not an audio music product.

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

-- 
Anja Oliveira -- MindSpring Enterprises
"When every node is whole, the channel opens."