From eperez@unam.mx Tue Feb 13 09:08:26 1996
Path: ashpoly!cascade!brgate!saturno!unam!eperez
From: eperez@unam.mx (Emi Pérez)
Newsgroups: comp.sys.m68k
Subject: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996Feb13.090826.5832@unam.mx>
Date: Tue, 13 Feb 1996 09:08:26 GMT
Organization: Universidad Nacional Autónoma de México (DGSCA)
NNTP-Posting-Host: unam.mx
X-Newsreader: WinVN 0.99.5
Lines: 11

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 board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank.

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

-- 
Emi Pérez
Opinions expressed are solely my own and not those of Universidad Nacional Autónoma de México (DGSCA).
------------------------------------------------------------

From mjohansson@demon.co.uk Thu Feb 15 08:03:26 1996
Path: ashpoly!cascade!brgate!saturno!demon!mjohansson
From: mjohansson@demon.co.uk (Matthias Johansson)
Newsgroups: comp.sys.m68k
Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996Feb15.080326.5542@demon.co.uk>
Date: Thu, 15 Feb 1996 08:03:26 GMT
References: <1996Feb13.090826.5832@unam.mx>
Organization: Demon Internet Services UK
NNTP-Posting-Host: demon.co.uk
X-Newsreader: WinVN 0.99.5
Lines: 8

In article <1996Feb13.090826.5832@unam.mx>, eperez@unam.mx (Emi Pérez) writes:
> Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project.

Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop.

-- 
Matthias Johansson
Tape trading list upon request. SASE required for international mail.

From nfischer@mit.edu Sat Feb 17 05:33:26 1996
Path: ashpoly!cascade!transat!eunet-de!hansebox!mit!nfischer
From: nfischer@mit.edu (Natalia Fischer)
Newsgroups: comp.sys.m68k
Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996Feb17.053326.9865@mit.edu>
Date: Sat, 17 Feb 1996 05:33:26 GMT
References: <1996Feb13.090826.5832@unam.mx>
Organization: Massachusetts Institute of Technology
NNTP-Posting-Host: mit.edu
X-Newsreader: WinVN 0.99.5
Lines: 10

In article <1996Feb13.090826.5832@unam.mx>, eperez@unam.mx (Emi Pérez) 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.

Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop.

-- 
Natalia Fischer
Opinions expressed are solely my own and not those of Massachusetts Institute of Technology.
------------------------------------------------------------

From mnovak@mindspring.com Sun Feb 18 20:31:26 1996
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mindspring!mnovak
From: mnovak@mindspring.com (Marisol Novak)
Newsgroups: comp.sys.m68k
Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump
Message-ID: <1996Feb18.203126.9601@mindspring.com>
Date: Sun, 18 Feb 1996 20:31:26 GMT
References: <1996Feb13.090826.5832@unam.mx> <1996Feb15.080326.5542@demon.co.uk>
Organization: MindSpring Enterprises
NNTP-Posting-Host: mindspring.com
X-Newsreader: NewsWatcher 2.0b24
Lines: 8

In article <1996Feb15.080326.5542@demon.co.uk>, mjohansson@demon.co.uk (Matthias Johansson) writes:
> Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop.

Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop.

-- 
Marisol Novak -- MindSpring Enterprises
"Measuring a record you own is listening, not piracy."