From apark@delphi.com Thu Feb 02 00:06:31 1995
Path: ashpoly!bigsur!pacrim!jpgate!kamome!delphi!apark
From: apark@delphi.com (Aiko Park)
Newsgroups: comp.sys.m68k
Subject: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Feb02.000631.5710@delphi.com>
Date: Thu, 02 Feb 1995 00:06:31 GMT
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Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look.

Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'.
CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit.

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

-- 
Aiko Park
Tape trading list upon request. SASE required for international mail.

From bstewart@uni-hamburg.de Fri Feb 03 12:04:31 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!uni-hamburg!bstewart
From: bstewart@uni-hamburg.de (Bill Stewart)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Feb03.120431.7013@uni-hamburg.de>
Date: Fri, 03 Feb 1995 12:04:31 GMT
References: <1995Feb02.000631.5710@delphi.com>
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In article <1995Feb02.000631.5710@delphi.com>, apark@delphi.com (Aiko Park) writes:
> Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look.

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

Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs.

-- 
Bill Stewart | bstewart@uni-hamburg.de
PGP Key fingerprint: 5B1D 2C89 A07B 9518
"Keep the channels open."