From mlopez@panix.com Sun Apr 02 10:20:10 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!panix!mlopez From: mlopez@panix.com (Mike López) Newsgroups: comp.sys.m68k Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Apr02.102010.6449@panix.com> Date: Sun, 02 Apr 1995 10:20:10 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 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'. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Mike López Tape trading list upon request. SASE required for international mail. From mstewart@mit.edu Mon Apr 03 12:49:10 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!mit!mstewart From: mstewart@mit.edu (Mei Stewart) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Apr03.124910.6791@mit.edu> Date: Mon, 03 Apr 1995 12:49:10 GMT References: <1995Apr02.102010.6449@panix.com> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Apr02.102010.6449@panix.com>, mlopez@panix.com (Mike López) writes: > 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. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- Mei Stewart Opinions expressed are solely my own and not those of Massachusetts Institute of Technology. ------------------------------------------------------------ From bchoi@clari.net Wed Apr 05 06:51:10 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!clari!bchoi From: bchoi@clari.net (Bastien Choi) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Apr05.065110.6081@clari.net> Date: Wed, 05 Apr 1995 06:51:10 GMT References: <1995Apr02.102010.6449@panix.com> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1995Apr02.102010.6449@panix.com>, mlopez@panix.com (Mike López) writes: > 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. Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). If you are posting from AOL, please read RFC 1036 before posting again. -- Bastien Choi | bchoi@clari.net PGP Key fingerprint: 7AFE 0AA5 6E5A 9406 "Keep the channels open." From mgirard@rwth-aachen.de Wed Apr 05 11:08:10 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!rwth-aachen!mgirard From: mgirard@rwth-aachen.de (Mateo Girard) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Apr05.110810.7390@rwth-aachen.de> Date: Wed, 05 Apr 1995 11:08:10 GMT References: <1995Apr02.102010.6449@panix.com> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Apr02.102010.6449@panix.com>, mlopez@panix.com (Mike López) writes: > 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. The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. -- Mateo Girard | mgirard@rwth-aachen.de PGP Key fingerprint: 425D F0AF A7DC 0F00 "Keep the channels open." From cmoreno@pacbell.net Wed Apr 05 21:01:10 1995 Path: ashpoly!cascade!brgate!saturno!pacbell!cmoreno From: cmoreno@pacbell.net (Camila Moreno) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Apr05.210110.8901@pacbell.net> Date: Wed, 05 Apr 1995 21:01:10 GMT References: <1995Apr02.102010.6449@panix.com> <1995Apr05.065110.6081@clari.net> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Apr05.065110.6081@clari.net>, bchoi@clari.net (Bastien Choi) writes: > Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Camila Moreno "Hardware is temporary. The signal survives." Atari Falcon 030 / FreeBSD 2.1