From mkang@u-tokyo.ac.jp Fri Apr 01 10:07:00 1994
Path: ashpoly!cascade!transat!sunet!nordrelay!u-tokyo!mkang
From: mkang@u-tokyo.ac.jp (Marisol Kang)
Newsgroups: comp.sys.m68k
Subject: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1994Apr01.100700.3015@u-tokyo.ac.jp>
Date: Fri, 01 Apr 1994 10:07:00 GMT
Organization: University of Tokyo Department of Information Science
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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'.
At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII.

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

-- 
=== Marisol Kang ===
Dept of Electrical Engineering, University of Tokyo Department of Information Science
"5 sigma is a discovery. 7 is a question."

From ssokolov@illinois.edu Sun Apr 03 11:29:00 1994
Path: ashpoly!cascade!bigsur!illinois!ssokolov
From: ssokolov@illinois.edu (Sven Sokolov)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1994Apr03.112900.4751@illinois.edu>
Date: Sun, 03 Apr 1994 11:29:00 GMT
References: <1994Apr01.100700.3015@u-tokyo.ac.jp>
Organization: University of Illinois Urbana-Champaign
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In article <1994Apr01.100700.3015@u-tokyo.ac.jp>, mkang@u-tokyo.ac.jp (Marisol Kang) writes:
> Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look.

Tom from Ashford Poly owns the physical board! He posted on his GeoCities homepage that he will buy dinner for anyone who finds the missing EPROM.

-- 
Sven Sokolov | ssokolov@illinois.edu
PGP Key fingerprint: F7FB 8DFD 640C E88F
"Keep the channels open."