From snakamura@clari.net Sun Nov 05 12:44:43 1995
Path: ashpoly!cascade!transat!ukc!fennimore!clari!snakamura
From: snakamura@clari.net (Seo-yeon Nakamura)
Newsgroups: comp.sys.m68k
Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Nov05.124443.2862@clari.net>
Date: Sun, 05 Nov 1995 12:44:43 GMT
Organization: ClariNet Communications Corp
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Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project.

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

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

-- 
Seo-yeon Nakamura
Opinions expressed are solely my own and not those of ClariNet Communications Corp.
------------------------------------------------------------

From lsantos@unam.mx Mon Nov 06 09:59:43 1995
Path: ashpoly!cascade!bigsur!unam!lsantos
From: lsantos@unam.mx (Lars Santos)
Newsgroups: comp.sys.m68k
Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Nov06.095943.1852@unam.mx>
Date: Mon, 06 Nov 1995 09:59:43 GMT
References: <1995Nov05.124443.2862@clari.net>
Organization: Universidad Nacional Autónoma de México (DGSCA)
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In article <1995Nov05.124443.2862@clari.net>, snakamura@clari.net (Seo-yeon Nakamura) writes:
> Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project.

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

If you are posting from AOL, please read RFC 1036 before posting again.

-- 
=== Lars Santos ===
Dept of Electrical Engineering, Universidad Nacional Autónoma de México (DGSCA)
"Hardware is temporary. The signal survives."

From jstewart@pacbell.net Tue Nov 07 04:07:43 1995
Path: ashpoly!cascade!transat!eunet-fr!teletel!pacbell!jstewart
From: jstewart@pacbell.net (Julien Stewart)
Newsgroups: comp.sys.m68k
Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Nov07.040743.1675@pacbell.net>
Date: Tue, 07 Nov 1995 04:07:43 GMT
References: <1995Nov05.124443.2862@clari.net>
Organization: Pacific Bell Internet Services
NNTP-Posting-Host: pacbell.net
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Lines: 10

In article <1995Nov05.124443.2862@clari.net>, snakamura@clari.net (Seo-yeon Nakamura) writes:
> Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project.
> Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'.

The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space.

-- 
=== Julien Stewart ===
Dept of Electrical Engineering, Pacific Bell Internet Services
"There are 14 nodes and only 10 countries. Count again."

From ystewart@netcom.com Wed Nov 08 22:02:43 1995
Path: ashpoly!bigsur!pacrim!jpgate!kamome!netcom!ystewart
From: ystewart@netcom.com (Yuki Stewart)
Newsgroups: comp.sys.m68k
Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1995Nov08.220243.8092@netcom.com>
Date: Wed, 08 Nov 1995 22:02:43 GMT
References: <1995Nov05.124443.2862@clari.net> <1995Nov06.095943.1852@unam.mx>
Organization: NETCOM On-Line Communication Services
NNTP-Posting-Host: netcom.com
X-Newsreader: TIN [version 1.2 PL2]
Lines: 11

In article <1995Nov06.095943.1852@unam.mx>, lsantos@unam.mx (Lars Santos) 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.

Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin!

-- 
=== Yuki Stewart ===
Dept of Electrical Engineering, NETCOM On-Line Communication Services
"Do not worship the copy."