From jweber@pacbell.net Tue Jan 24 10:57:12 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!pacbell!jweber
From: jweber@pacbell.net (Joachim Weber)
Newsgroups: comp.sys.m68k
Subject: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Jan24.105712.8200@pacbell.net>
Date: Tue, 24 Jan 1995 10:57:12 GMT
Organization: Pacific Bell Internet Services
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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.

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

-- 
Joachim Weber -- Pacific Bell Internet Services
"Hardware is temporary. The signal survives."

From kivanov@demon.co.uk Wed Jan 25 18:04:12 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!demon!kivanov
From: kivanov@demon.co.uk (Karen Ivanov)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Jan25.180412.2261@demon.co.uk>
Date: Wed, 25 Jan 1995 18:04:12 GMT
References: <1995Jan24.105712.8200@pacbell.net>
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In article <1995Jan24.105712.8200@pacbell.net>, jweber@pacbell.net (Joachim Weber) writes:
> 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'.

The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon.

-- 
Karen Ivanov
Tape trading list upon request. SASE required for international mail.

From ekuznetsov@purdue.edu Thu Jan 26 02:12:12 1995
Path: ashpoly!cascade!transat!ukc!fennimore!purdue!ekuznetsov
From: ekuznetsov@purdue.edu (Emi Kuznetsov)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Jan26.021212.1734@purdue.edu>
Date: Thu, 26 Jan 1995 02:12:12 GMT
References: <1995Jan24.105712.8200@pacbell.net>
Organization: Purdue University Engineering Computer Network
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In article <1995Jan24.105712.8200@pacbell.net>, jweber@pacbell.net (Joachim Weber) writes:
> 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'.

The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon.

-- 
Emi Kuznetsov
Tape trading list upon request. SASE required for international mail.