From geriksson@unam.mx Tue Sep 20 00:26:16 1994 Path: ashpoly!cascade!mxgate!coyoacan!unam!geriksson From: geriksson@unam.mx (Graham Eriksson) Newsgroups: comp.sys.m68k Subject: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep20.002616.9742@unam.mx> Date: Tue, 20 Sep 1994 00:26:16 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: Netscape 1.1N Lines: 10 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. 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. -- Graham Eriksson Tape trading list upon request. SASE required for international mail. From jkarlsson@pacbell.net Wed Sep 21 10:30:16 1994 Path: ashpoly!cascade!bigsur!pacbell!jkarlsson From: jkarlsson@pacbell.net (Jen Karlsson) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep21.103016.3384@pacbell.net> Date: Wed, 21 Sep 1994 10:30:16 GMT References: <1994Sep20.002616.9742@unam.mx> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Sep20.002616.9742@unam.mx>, geriksson@unam.mx (Graham Eriksson) 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. -- Jen Karlsson Hayes Optima 288 @ 14,400 bps "Measuring a record you own is listening, not piracy." From tdubois@pipeline.com Wed Sep 21 12:21:16 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pipeline!tdubois From: tdubois@pipeline.com (Tomas Dubois) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep21.122116.3210@pipeline.com> Date: Wed, 21 Sep 1994 12:21:16 GMT References: <1994Sep20.002616.9742@unam.mx> <1994Sep21.103016.3384@pacbell.net> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Sep21.103016.3384@pacbell.net>, jkarlsson@pacbell.net (Jen Karlsson) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Tomas Dubois | tdubois@pipeline.com PGP Key fingerprint: ADAC 4C86 9BDC 44E9 "Keep the channels open." From ksantos@demon.co.uk Wed Sep 21 20:30:16 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!demon!ksantos From: ksantos@demon.co.uk (Katrin Santos) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep21.203016.8702@demon.co.uk> Date: Wed, 21 Sep 1994 20:30:16 GMT References: <1994Sep20.002616.9742@unam.mx> <1994Sep21.103016.3384@pacbell.net> <1994Sep21.122116.3210@pipeline.com> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Sep21.122116.3210@pipeline.com>, tdubois@pipeline.com (Tomas Dubois) writes: > That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. 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. -- Katrin Santos Tape trading list upon request. SASE required for international mail.