From mlarsson@uu.net Sun Sep 10 13:37:29 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uu!mlarsson
From: mlarsson@uu.net (Mateo Larsson)
Newsgroups: comp.sys.m68k
Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Sep10.133729.8414@uu.net>
Date: Sun, 10 Sep 1995 13:37:29 GMT
Organization: UUNET Technologies, Falls Church VA
NNTP-Posting-Host: uu.net
X-Newsreader: WinVN 0.99.5
Lines: 11

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'.

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

-- 
Mateo Larsson | mlarsson@uu.net
PGP Key fingerprint: 0D6E E030 D4A3 AE8C
"Keep the channels open."

From isilva@rwth-aachen.de Tue Sep 12 13:40:29 1995
Path: ashpoly!cascade!mxgate!coyoacan!rwth-aachen!isilva
From: isilva@rwth-aachen.de (Ines Silva)
Newsgroups: comp.sys.m68k
Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Sep12.134029.4896@rwth-aachen.de>
Date: Tue, 12 Sep 1995 13:40:29 GMT
References: <1995Sep10.133729.8414@uu.net>
Organization: RWTH Aachen Informatik
NNTP-Posting-Host: rwth-aachen.de
X-Newsreader: NewsWatcher 2.0b24
Lines: 9

In article <1995Sep10.133729.8414@uu.net>, mlarsson@uu.net (Mateo Larsson) 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.

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

-- 
Ines Silva -- RWTH Aachen Informatik
"When every node is whole, the channel opens."