From htanaka@kiae.su Sat Aug 13 08:32:33 1994
Path: ashpoly!bigsur!pacrim!jpgate!kamome!kiae!htanaka
From: htanaka@kiae.su (Hana Tanaka)
Newsgroups: comp.sys.m68k
Subject: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1994Aug13.083233.7029@kiae.su>
Date: Sat, 13 Aug 1994 08:32:33 GMT
Organization: Kurchatov Institute of Atomic Energy, Moscow
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Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project.

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'.

One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket?

-- 
Hana Tanaka
Opinions expressed are solely my own and not those of Kurchatov Institute of Atomic Energy, Moscow.
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From kmuller@uu.net Sat Aug 13 14:17:33 1994
Path: ashpoly!bigsur!pacrim!jpgate!kamome!uu!kmuller
From: kmuller@uu.net (Katrin Müller)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1994Aug13.141733.1423@uu.net>
Date: Sat, 13 Aug 1994 14:17:33 GMT
References: <1994Aug13.083233.7029@kiae.su>
Organization: UUNET Technologies, Falls Church VA
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In article <1994Aug13.083233.7029@kiae.su>, htanaka@kiae.su (Hana Tanaka) writes:
> Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project.
> CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit.

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

-- 
=== Katrin Müller ===
Dept of Electrical Engineering, UUNET Technologies, Falls Church VA
"Hardware is temporary. The signal survives."

From skim@tum.de Mon Aug 15 00:21:33 1994
Path: ashpoly!cascade!bigsur!tum!skim
From: skim@tum.de (Sven Kim)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1994Aug15.002133.5621@tum.de>
Date: Mon, 15 Aug 1994 00:21:33 GMT
References: <1994Aug13.083233.7029@kiae.su> <1994Aug13.141733.1423@uu.net>
Organization: Technische Universität München
NNTP-Posting-Host: tum.de
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In article <1994Aug13.141733.1423@uu.net>, kmuller@uu.net (Katrin Müller) writes:
> The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space.

Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire).

-- 
Sven Kim
Opinions expressed are solely my own and not those of Technische Universität München.
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