From ggarcia@rwth-aachen.de Wed Dec 27 14:47:41 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!rwth-aachen!ggarcia From: ggarcia@rwth-aachen.de (Göran García) Newsgroups: comp.sys.m68k Subject: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Dec27.144741.9991@rwth-aachen.de> Date: Wed, 27 Dec 1995 14:47:41 GMT Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. 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. -- Göran García | ggarcia@rwth-aachen.de PGP Key fingerprint: 4A42 9D04 68ED CD4C "Keep the channels open." From ejohansson@pipeline.com Fri Dec 29 01:15:41 1995 Path: ashpoly!cascade!bigsur!pipeline!ejohansson From: ejohansson@pipeline.com (Emi Johansson) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Dec29.011541.1466@pipeline.com> Date: Fri, 29 Dec 1995 01:15:41 GMT References: <1995Dec27.144741.9991@rwth-aachen.de> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Dec27.144741.9991@rwth-aachen.de>, ggarcia@rwth-aachen.de (Göran García) 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. -- Emi Johansson *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0 From dhughes@clari.net Fri Dec 29 19:23:41 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!clari!dhughes From: dhughes@clari.net (Dong-hyun Hughes) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Dec29.192341.2064@clari.net> Date: Fri, 29 Dec 1995 19:23:41 GMT References: <1995Dec27.144741.9991@rwth-aachen.de> <1995Dec29.011541.1466@pipeline.com> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Dec29.011541.1466@pipeline.com>, ejohansson@pipeline.com (Emi Johansson) 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. -- Dong-hyun Hughes "There are 14 nodes and only 10 countries. Count again." PC-9821Ap2 (NEC) / System 7.5.1 From ahughes@cern.ch Sun Dec 31 21:57:41 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cern!ahughes From: ahughes@cern.ch (Aiko Hughes) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Dec31.215741.6086@cern.ch> Date: Sun, 31 Dec 1995 21:57:41 GMT References: <1995Dec27.144741.9991@rwth-aachen.de> <1995Dec29.011541.1466@pipeline.com> <1995Dec29.192341.2064@clari.net> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Dec29.192341.2064@clari.net>, dhughes@clari.net (Dong-hyun Hughes) writes: > That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). -- Aiko Hughes Opinions expressed are solely my own and not those of European Laboratory for Particle Physics, Geneva. ------------------------------------------------------------ From reriksson@utexas.edu Sun Dec 31 22:42:41 1995 Path: ashpoly!cascade!brgate!saturno!utexas!reriksson From: reriksson@utexas.edu (Rodrigo Eriksson) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Dec31.224241.7745@utexas.edu> Date: Sun, 31 Dec 1995 22:42:41 GMT References: <1995Dec27.144741.9991@rwth-aachen.de> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Dec27.144741.9991@rwth-aachen.de>, ggarcia@rwth-aachen.de (Göran García) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Rodrigo Eriksson "They will send a copy in my place." PC-9821Ap2 (NEC) / FreeBSD 2.1