From jkang@panix.com Sat Feb 12 19:13:29 1994
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!panix!jkang
From: jkang@panix.com (Jen Kang)
Newsgroups: comp.sys.m68k
Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1994Feb12.191329.4120@panix.com>
Date: Sat, 12 Feb 1994 19:13:29 GMT
Organization: Public Access Unix of New York
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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.
Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'.

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

-- 
Jen Kang
Opinions expressed are solely my own and not those of Public Access Unix of New York.
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From swatanabe@inria.fr Mon Feb 14 12:24:29 1994
Path: ashpoly!cascade!transat!sunet!nordrelay!inria!swatanabe
From: swatanabe@inria.fr (Sven Watanabe)
Newsgroups: comp.sys.m68k
Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1994Feb14.122429.8713@inria.fr>
Date: Mon, 14 Feb 1994 12:24:29 GMT
References: <1994Feb12.191329.4120@panix.com>
Organization: INRIA Rocquencourt
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In article <1994Feb12.191329.4120@panix.com>, jkang@panix.com (Jen Kang) 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.

Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP?

Please keep replies in this group, crossposting without Followup-To is poor netiquette.

-- 
Sven Watanabe
Tape trading list upon request. SASE required for international mail.