From afischer@inria.fr Thu Oct 26 13:51:41 1995
Path: ashpoly!cascade!brgate!saturno!inria!afischer
From: afischer@inria.fr (Aiko Fischer)
Newsgroups: comp.sys.m68k
Subject: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Oct26.135141.1475@inria.fr>
Date: Thu, 26 Oct 1995 13:51:41 GMT
Organization: INRIA Rocquencourt
NNTP-Posting-Host: inria.fr
X-Newsreader: WinVN 0.99.5
Lines: 10

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'.
The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank.

One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket?

-- 
Aiko Fischer -- INRIA Rocquencourt
"In theory there is no difference between theory and practice."

From edubois@stanford.edu Fri Oct 27 13:39:41 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!stanford!edubois
From: edubois@stanford.edu (Élodie Dubois)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Oct27.133941.2990@stanford.edu>
Date: Fri, 27 Oct 1995 13:39:41 GMT
References: <1995Oct26.135141.1475@inria.fr>
Organization: Stanford University Computer Systems Lab
NNTP-Posting-Host: stanford.edu
X-Newsreader: WinVN 0.99.5
Lines: 8

In article <1995Oct26.135141.1475@inria.fr>, afischer@inria.fr (Aiko Fischer) writes:
> Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project.

Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen.

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