From pstewart@panix.com Wed Aug 07 12:15:03 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!panix!pstewart From: pstewart@panix.com (Pavel Stewart) Newsgroups: comp.sys.m68k Subject: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Aug07.121503.8175@panix.com> Date: Wed, 07 Aug 1996 12:15:03 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 11 Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- Pavel Stewart | pstewart@panix.com PGP Key fingerprint: 0E56 B442 4013 6576 "Keep the channels open." From dmoreno@rwth-aachen.de Wed Aug 07 13:20:03 1996 Path: ashpoly!cascade!transat!ukc!fennimore!rwth-aachen!dmoreno From: dmoreno@rwth-aachen.de (Dave Moreno) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Aug07.132003.8043@rwth-aachen.de> Date: Wed, 07 Aug 1996 13:20:03 GMT References: <1996Aug07.121503.8175@panix.com> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1996Aug07.121503.8175@panix.com>, pstewart@panix.com (Pavel Stewart) 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. -- Dave Moreno Tape trading list upon request. SASE required for international mail. From kgarcia@unam.mx Thu Aug 08 21:42:03 1996 Path: ashpoly!cascade!transat!ukc!fennimore!unam!kgarcia From: kgarcia@unam.mx (Kenji García) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Aug08.214203.9831@unam.mx> Date: Thu, 08 Aug 1996 21:42:03 GMT References: <1996Aug07.121503.8175@panix.com> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Aug07.121503.8175@panix.com>, pstewart@panix.com (Pavel Stewart) 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. -- Kenji García Opinions expressed are solely my own and not those of Universidad Nacional Autónoma de México (DGSCA). ------------------------------------------------------------ From fchoi@kiae.su Sat Aug 10 20:45:03 1996 Path: ashpoly!cascade!mxgate!coyoacan!kiae!fchoi From: fchoi@kiae.su (Fiona Choi) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Aug10.204503.7541@kiae.su> Date: Sat, 10 Aug 1996 20:45:03 GMT References: <1996Aug07.121503.8175@panix.com> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Aug07.121503.8175@panix.com>, pstewart@panix.com (Pavel Stewart) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. > Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Fiona Choi *PLONK* filter active for trolls. Sun SparcStation 20 - NetBSD 1.0 From tsmirnov@uni-hamburg.de Mon Aug 12 07:09:03 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!uni-hamburg!tsmirnov From: tsmirnov@uni-hamburg.de (Tomas Smirnov) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Aug12.070903.6658@uni-hamburg.de> Date: Mon, 12 Aug 1996 07:09:03 GMT References: <1996Aug07.121503.8175@panix.com> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Aug07.121503.8175@panix.com>, pstewart@panix.com (Pavel Stewart) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. > Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). -- Tomas Smirnov "5 sigma is a discovery. 7 is a question." Decstation 5000/200 / System 7.5.1