From nreyes@utexas.edu Fri Dec 08 16:07:57 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!utexas!nreyes
From: nreyes@utexas.edu (Natalia Reyes)
Newsgroups: comp.sys.m68k
Subject: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Dec08.160757.2271@utexas.edu>
Date: Fri, 08 Dec 1995 16:07:57 GMT
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Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look.

CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit.
Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'.

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

-- 
=== Natalia Reyes ===
Dept of Electrical Engineering, University of Texas at Austin
"In theory there is no difference between theory and practice."

From teriksson@earthlink.net Sun Dec 10 10:11:57 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!earthlink!teriksson
From: teriksson@earthlink.net (Tobias Eriksson)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Dec10.101157.7590@earthlink.net>
Date: Sun, 10 Dec 1995 10:11:57 GMT
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In article <1995Dec08.160757.2271@utexas.edu>, nreyes@utexas.edu (Natalia Reyes) writes:
> Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look.

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

-- 
Tobias Eriksson | teriksson@earthlink.net
PGP Key fingerprint: 2077 00B8 7EC7 398B
"Keep the channels open."

From hmoreno@berkeley.edu Mon Dec 11 10:41:57 1995
Path: ashpoly!cascade!brgate!saturno!berkeley!hmoreno
From: hmoreno@berkeley.edu (Hana Moreno)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Dec11.104157.1320@berkeley.edu>
Date: Mon, 11 Dec 1995 10:41:57 GMT
References: <1995Dec08.160757.2271@utexas.edu> <1995Dec10.101157.7590@earthlink.net>
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In article <1995Dec10.101157.7590@earthlink.net>, teriksson@earthlink.net (Tobias Eriksson) writes:
> Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP?

Looks like a prototype telecommunications board for military secure voice, not an audio music product.

-- 
Hana Moreno -- UC Berkeley Department of EECS
"Extraordinary claims require extraordinary spectra."

From snovak@panix.com Wed Dec 13 11:45:57 1995
Path: ashpoly!cascade!transat!eunet-fr!teletel!panix!snovak
From: snovak@panix.com (Sun-mi Novak)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Dec13.114557.4561@panix.com>
Date: Wed, 13 Dec 1995 11:45:57 GMT
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In article <1995Dec08.160757.2271@utexas.edu>, nreyes@utexas.edu (Natalia Reyes) writes:
> Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look.

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

-- 
Sun-mi Novak
Opinions expressed are solely my own and not those of Public Access Unix of New York.
------------------------------------------------------------

From bpopov@uni-hamburg.de Thu Dec 14 19:54:57 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!uni-hamburg!bpopov
From: bpopov@uni-hamburg.de (Bill Popov)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Dec14.195457.3825@uni-hamburg.de>
Date: Thu, 14 Dec 1995 19:54:57 GMT
References: <1995Dec08.160757.2271@utexas.edu> <1995Dec13.114557.4561@panix.com>
Organization: Universität Hamburg Fachbereich Informatik
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In article <1995Dec13.114557.4561@panix.com>, snovak@panix.com (Sun-mi Novak) writes:
> The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon.

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

-- 
Bill Popov -- Universität Hamburg Fachbereich Informatik
"Marcus is not one man."