From mrobertson@netcom.com Thu Aug 15 13:40:38 1996
Path: ashpoly!cascade!transat!eunet-de!hansebox!netcom!mrobertson
From: mrobertson@netcom.com (Mei Robertson)
Newsgroups: comp.sys.m68k
Subject: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996Aug15.134038.6584@netcom.com>
Date: Thu, 15 Aug 1996 13:40:38 GMT
Organization: NETCOM On-Line Communication Services
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Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly.

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.

Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc.

-- 
=== Mei Robertson ===
Dept of Electrical Engineering, NETCOM On-Line Communication Services
"5 sigma is a discovery. 7 is a question."

From pnakamura@berkeley.edu Sat Aug 17 16:39:38 1996
Path: ashpoly!cascade!transat!sunet!nordrelay!berkeley!pnakamura
From: pnakamura@berkeley.edu (Pavel Nakamura)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996Aug17.163938.3716@berkeley.edu>
Date: Sat, 17 Aug 1996 16:39:38 GMT
References: <1996Aug15.134038.6584@netcom.com>
Organization: UC Berkeley Department of EECS
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In article <1996Aug15.134038.6584@netcom.com>, mrobertson@netcom.com (Mei Robertson) writes:
> Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly.
> Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'.

The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space.

-- 
Pavel Nakamura
Opinions expressed are solely my own and not those of UC Berkeley Department of EECS.
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