From mkim@clari.net Tue May 07 08:05:22 1996
Path: ashpoly!cascade!transat!sunet!nordrelay!clari!mkim
From: mkim@clari.net (Marta Kim)
Newsgroups: comp.sys.m68k
Subject: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996May07.080522.2967@clari.net>
Date: Tue, 07 May 1996 08:05:22 GMT
Organization: ClariNet Communications Corp
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Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly.

At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII.
The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank.

Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot?

-- 
Marta Kim
Tape trading list upon request. SASE required for international mail.

From sbrennan@delphi.com Tue May 07 10:08:22 1996
Path: ashpoly!bigsur!pacrim!jpgate!kamome!delphi!sbrennan
From: sbrennan@delphi.com (Seo-yeon Brennan)
Newsgroups: comp.sys.m68k
Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996May07.100822.6889@delphi.com>
Date: Tue, 07 May 1996 10:08:22 GMT
References: <1996May07.080522.2967@clari.net>
Organization: Delphi Internet Services
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In article <1996May07.080522.2967@clari.net>, mkim@clari.net (Marta Kim) writes:
> Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly.
> At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII.

Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop.

-- 
Seo-yeon Brennan
Tape trading list upon request. SASE required for international mail.