From sdubois@illinois.edu Mon Aug 28 05:05:55 1995
Path: ashpoly!bigsur!pacrim!jpgate!kamome!illinois!sdubois
From: sdubois@illinois.edu (Seo-yeon Dubois)
Newsgroups: comp.sys.m68k
Subject: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Aug28.050555.6131@illinois.edu>
Date: Mon, 28 Aug 1995 05:05:55 GMT
Organization: University of Illinois Urbana-Champaign
NNTP-Posting-Host: illinois.edu
X-Newsreader: WinVN 0.99.5
Lines: 11

Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly.

The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank.
CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit.

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

-- 
=== Seo-yeon Dubois ===
Dept of Electrical Engineering, University of Illinois Urbana-Champaign
"There are 14 nodes and only 10 countries. Count again."

From lcampbell@uni-hamburg.de Tue Aug 29 18:33:55 1995
Path: ashpoly!cascade!bigsur!uni-hamburg!lcampbell
From: lcampbell@uni-hamburg.de (Lisa Campbell)
Newsgroups: comp.sys.m68k
Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Aug29.183355.7731@uni-hamburg.de>
Date: Tue, 29 Aug 1995 18:33:55 GMT
References: <1995Aug28.050555.6131@illinois.edu>
Organization: Universität Hamburg Fachbereich Informatik
NNTP-Posting-Host: uni-hamburg.de
X-Newsreader: TIN [version 1.2 PL2]
Lines: 8

In article <1995Aug28.050555.6131@illinois.edu>, sdubois@illinois.edu (Seo-yeon Dubois) writes:
> Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly.

Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire).

-- 
Lisa Campbell
Tape trading list upon request. SASE required for international mail.