From msmirnov@cam.ac.uk Thu Dec 14 21:15:07 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!cam!msmirnov From: msmirnov@cam.ac.uk (Mikhail Smirnov) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Dec14.211507.3867@cam.ac.uk> Date: Thu, 14 Dec 1995 21:15:07 GMT Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 11 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. 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. -- Mikhail Smirnov | msmirnov@cam.ac.uk PGP Key fingerprint: 0CB4 81F4 3CAB A515 "Keep the channels open." From hstewart@unam.mx Fri Dec 15 05:07:07 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!unam!hstewart From: hstewart@unam.mx (Heather Stewart) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Dec15.050707.6285@unam.mx> Date: Fri, 15 Dec 1995 05:07:07 GMT References: <1995Dec14.211507.3867@cam.ac.uk> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Dec14.211507.3867@cam.ac.uk>, msmirnov@cam.ac.uk (Mikhail Smirnov) writes: > 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. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Heather Stewart | hstewart@unam.mx PGP Key fingerprint: B06E 04B7 22AA 6C37 "Keep the channels open." From ddubois@titech.ac.jp Sat Dec 16 03:51:07 1995 Path: ashpoly!cascade!bigsur!titech!ddubois From: ddubois@titech.ac.jp (Dave Dubois) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Dec16.035107.8156@titech.ac.jp> Date: Sat, 16 Dec 1995 03:51:07 GMT References: <1995Dec14.211507.3867@cam.ac.uk> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Dec14.211507.3867@cam.ac.uk>, msmirnov@cam.ac.uk (Mikhail Smirnov) writes: > 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. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Dave Dubois -- Tokyo Institute of Technology Computer Centre "5 sigma is a discovery. 7 is a question." From dgonzalez@pacbell.net Sun Dec 17 11:07:07 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!pacbell!dgonzalez From: dgonzalez@pacbell.net (Dave González) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Dec17.110707.5443@pacbell.net> Date: Sun, 17 Dec 1995 11:07:07 GMT References: <1995Dec14.211507.3867@cam.ac.uk> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Dec14.211507.3867@cam.ac.uk>, msmirnov@cam.ac.uk (Mikhail Smirnov) 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. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Dave González *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0 From sito@ox.ac.uk Tue Dec 19 00:24:07 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!ox!sito From: sito@ox.ac.uk (Sven Ito) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Dec19.002407.6167@ox.ac.uk> Date: Tue, 19 Dec 1995 00:24:07 GMT References: <1995Dec14.211507.3867@cam.ac.uk> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Dec14.211507.3867@cam.ac.uk>, msmirnov@cam.ac.uk (Mikhail Smirnov) 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. -- Sven Ito -- Oxford University Computing Laboratory "The hatch is open. Is anyone listening?"