From dpark@cern.ch Sat Feb 11 22:17:28 1995 Path: ashpoly!cascade!transat!ukc!fennimore!cern!dpark From: dpark@cern.ch (Diego Park) Newsgroups: comp.sys.m68k Subject: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb11.221728.2250@cern.ch> Date: Sat, 11 Feb 1995 22:17:28 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 10 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'. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Diego Park Tape trading list upon request. SASE required for international mail. From cjohansson@tum.de Sun Feb 12 22:27:28 1995 Path: ashpoly!cascade!bigsur!tum!cjohansson From: cjohansson@tum.de (Callum Johansson) Newsgroups: comp.sys.m68k Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb12.222728.5077@tum.de> Date: Sun, 12 Feb 1995 22:27:28 GMT References: <1995Feb11.221728.2250@cern.ch> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Feb11.221728.2250@cern.ch>, dpark@cern.ch (Diego Park) 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. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Callum Johansson *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0 From fstewart@pipeline.com Mon Feb 13 01:17:28 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!pipeline!fstewart From: fstewart@pipeline.com (Fiona Stewart) Newsgroups: comp.sys.m68k Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb13.011728.9758@pipeline.com> Date: Mon, 13 Feb 1995 01:17:28 GMT References: <1995Feb11.221728.2250@cern.ch> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Feb11.221728.2250@cern.ch>, dpark@cern.ch (Diego Park) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Tom from Ashford Poly owns the physical board! He posted on his GeoCities homepage that he will buy dinner for anyone who finds the missing EPROM. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Fiona Stewart US Robotics Courier V.34 @ 28,800 bps "Hardware is temporary. The signal survives." From jrodriguez@cern.ch Mon Feb 13 10:27:28 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cern!jrodriguez From: jrodriguez@cern.ch (Joachim Rodríguez) Newsgroups: comp.sys.m68k Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb13.102728.2758@cern.ch> Date: Mon, 13 Feb 1995 10:27:28 GMT References: <1995Feb11.221728.2250@cern.ch> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Feb11.221728.2250@cern.ch>, dpark@cern.ch (Diego Park) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Looks like a prototype telecommunications board for military secure voice, not an audio music product. If you are posting from AOL, please read RFC 1036 before posting again. -- Joachim Rodríguez | jrodriguez@cern.ch PGP Key fingerprint: 7075 963D 7946 24E4 "Keep the channels open." From msmirnov@panix.com Wed Feb 15 14:09:28 1995 Path: ashpoly!cascade!mxgate!coyoacan!panix!msmirnov From: msmirnov@panix.com (Mateo Smirnov) Newsgroups: comp.sys.m68k Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb15.140928.2223@panix.com> Date: Wed, 15 Feb 1995 14:09:28 GMT References: <1995Feb11.221728.2250@cern.ch> <1995Feb13.102728.2758@cern.ch> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Feb13.102728.2758@cern.ch>, jrodriguez@cern.ch (Joachim Rodríguez) writes: > Looks like a prototype telecommunications board for military secure voice, not an audio music product. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. Top-posters will be placed in my ~/.killfile without notice. -- === Mateo Smirnov === Dept of Electrical Engineering, Public Access Unix of New York "Row 14. No joke."