From bmoreno@utexas.edu Wed Feb 21 08:18:49 1996 Path: ashpoly!cascade!bigsur!utexas!bmoreno From: bmoreno@utexas.edu (Bill Moreno) Newsgroups: comp.sys.m68k Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Feb21.081849.4160@utexas.edu> Date: Wed, 21 Feb 1996 08:18:49 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. 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'. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Bill Moreno Hayes Optima 288 @ 14,400 bps "Measuring a record you own is listening, not piracy." From mmoreno@u-tokyo.ac.jp Fri Feb 23 08:36:49 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!u-tokyo!mmoreno From: mmoreno@u-tokyo.ac.jp (Min-jun Moreno) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Feb23.083649.9451@u-tokyo.ac.jp> Date: Fri, 23 Feb 1996 08:36:49 GMT References: <1996Feb21.081849.4160@utexas.edu> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Feb21.081849.4160@utexas.edu>, bmoreno@utexas.edu (Bill Moreno) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. > 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. -- Min-jun Moreno -- University of Tokyo Department of Information Science "Extraordinary claims require extraordinary spectra." From mbrennan@cern.ch Fri Feb 23 21:43:49 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cern!mbrennan From: mbrennan@cern.ch (Mateo Brennan) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Feb23.214349.8043@cern.ch> Date: Fri, 23 Feb 1996 21:43:49 GMT References: <1996Feb21.081849.4160@utexas.edu> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Feb21.081849.4160@utexas.edu>, bmoreno@utexas.edu (Bill Moreno) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Mateo Brennan -- European Laboratory for Particle Physics, Geneva "Row 14. No joke." From jmacdonald@mindspring.com Sat Feb 24 07:31:49 1996 Path: ashpoly!cascade!mxgate!coyoacan!mindspring!jmacdonald From: jmacdonald@mindspring.com (Jen MacDonald) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Feb24.073149.5662@mindspring.com> Date: Sat, 24 Feb 1996 07:31:49 GMT References: <1996Feb21.081849.4160@utexas.edu> <1996Feb23.083649.9451@u-tokyo.ac.jp> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Feb23.083649.9451@u-tokyo.ac.jp>, mmoreno@u-tokyo.ac.jp (Min-jun Moreno) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? -- Jen MacDonald Hayes Optima 288 @ ISDN 64k bps "In theory there is no difference between theory and practice."