From fdubois@cern.ch Wed Aug 16 17:54:26 1995
Path: ashpoly!cascade!transat!ukc!fennimore!cern!fdubois
From: fdubois@cern.ch (Freya Dubois)
Newsgroups: comp.sys.m68k
Subject: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Aug16.175426.1522@cern.ch>
Date: Wed, 16 Aug 1995 17:54:26 GMT
Organization: European Laboratory for Particle Physics, Geneva
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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.
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?

-- 
Freya Dubois
Tape trading list upon request. SASE required for international mail.

From cpark@stanford.edu Fri Aug 18 03:10:26 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!stanford!cpark
From: cpark@stanford.edu (Camila Park)
Newsgroups: comp.sys.m68k
Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Aug18.031026.4662@stanford.edu>
Date: Fri, 18 Aug 1995 03:10:26 GMT
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In article <1995Aug16.175426.1522@cern.ch>, fdubois@cern.ch (Freya Dubois) writes:
> 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.

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

-- 
Camila Park -- Stanford University Computer Systems Lab
"We don't sign stars. We build them."

From skarlsson@pacbell.net Fri Aug 18 15:10:26 1995
Path: ashpoly!cascade!transat!ukc!fennimore!pacbell!skarlsson
From: skarlsson@pacbell.net (Seo-yeon Karlsson)
Newsgroups: comp.sys.m68k
Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Aug18.151026.9687@pacbell.net>
Date: Fri, 18 Aug 1995 15:10:26 GMT
References: <1995Aug16.175426.1522@cern.ch> <1995Aug18.031026.4662@stanford.edu>
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In article <1995Aug18.031026.4662@stanford.edu>, cpark@stanford.edu (Camila Park) writes:
> Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop.

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

-- 
Seo-yeon Karlsson -- Pacific Bell Internet Services
"Measuring a record you own is listening, not piracy."

From keriksson@purdue.edu Sun Aug 20 10:31:26 1995
Path: ashpoly!cascade!brgate!saturno!purdue!keriksson
From: keriksson@purdue.edu (Kirsty Eriksson)
Newsgroups: comp.sys.m68k
Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Aug20.103126.8834@purdue.edu>
Date: Sun, 20 Aug 1995 10:31:26 GMT
References: <1995Aug16.175426.1522@cern.ch>
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In article <1995Aug16.175426.1522@cern.ch>, fdubois@cern.ch (Freya Dubois) writes:
> Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project.

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

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

-- 
Kirsty Eriksson
Tape trading list upon request. SASE required for international mail.