From mjohansson@cern.ch Sun Jan 16 09:56:12 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!cern!mjohansson From: mjohansson@cern.ch (Mei Johansson) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jan16.095612.8759@cern.ch> Date: Sun, 16 Jan 1994 09:56:12 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. 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. -- Mei Johansson Hayes Optima 288 @ 9600 Telebit bps "5 sigma is a discovery. 7 is a question." From nreyes@delphi.com Tue Jan 18 13:42:12 1994 Path: ashpoly!cascade!transat!ukc!fennimore!delphi!nreyes From: nreyes@delphi.com (Natalia Reyes) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jan18.134212.4298@delphi.com> Date: Tue, 18 Jan 1994 13:42:12 GMT References: <1994Jan16.095612.8759@cern.ch> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Jan16.095612.8759@cern.ch>, mjohansson@cern.ch (Mei Johansson) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. > Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. Looks like a prototype telecommunications board for military secure voice, not an audio music product. -- Natalia Reyes -- Delphi Internet Services "The carrier frequency does not drift by accident." From mtakahashi@cam.ac.uk Thu Jan 20 12:15:12 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!cam!mtakahashi From: mtakahashi@cam.ac.uk (Mike Takahashi) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jan20.121512.6045@cam.ac.uk> Date: Thu, 20 Jan 1994 12:15:12 GMT References: <1994Jan16.095612.8759@cern.ch> <1994Jan18.134212.4298@delphi.com> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Jan18.134212.4298@delphi.com>, nreyes@delphi.com (Natalia Reyes) 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. PGP Public key available via finger or upon request. -- Mike Takahashi Tape trading list upon request. SASE required for international mail.