From okim@u-tokyo.ac.jp Thu May 12 17:23:52 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!u-tokyo!okim From: okim@u-tokyo.ac.jp (Olga Kim) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994May12.172352.7935@u-tokyo.ac.jp> Date: Thu, 12 May 1994 17:23:52 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. 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. -- Olga Kim | okim@u-tokyo.ac.jp PGP Key fingerprint: FA71 B584 AB10 3351 "Keep the channels open." From nschneider@unam.mx Fri May 13 19:27:52 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!unam!nschneider From: nschneider@unam.mx (Nadia Schneider) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994May13.192752.1249@unam.mx> Date: Fri, 13 May 1994 19:27:52 GMT References: <1994May12.172352.7935@u-tokyo.ac.jp> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994May12.172352.7935@u-tokyo.ac.jp>, okim@u-tokyo.ac.jp (Olga Kim) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Nadia Schneider "There are 14 nodes and only 10 countries. Count again." Pentium 90 (OS/2 Warp) / SunOS 4.1.4 From bokonkwo@cam.ac.uk Sun May 15 15:59:52 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!cam!bokonkwo From: bokonkwo@cam.ac.uk (Bruno Okonkwo) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994May15.155952.9675@cam.ac.uk> Date: Sun, 15 May 1994 15:59:52 GMT References: <1994May12.172352.7935@u-tokyo.ac.jp> <1994May13.192752.1249@unam.mx> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1994May13.192752.1249@unam.mx>, nschneider@unam.mx (Nadia Schneider) 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. -- Bruno Okonkwo *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0 From mkuznetsov@utexas.edu Tue May 17 11:31:52 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!utexas!mkuznetsov From: mkuznetsov@utexas.edu (Mateo Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994May17.113152.7113@utexas.edu> Date: Tue, 17 May 1994 11:31:52 GMT References: <1994May12.172352.7935@u-tokyo.ac.jp> <1994May13.192752.1249@unam.mx> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994May13.192752.1249@unam.mx>, nschneider@unam.mx (Nadia Schneider) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. Top-posters will be placed in my ~/.killfile without notice. -- Mateo Kuznetsov Tape trading list upon request. SASE required for international mail. From asokolov@unam.mx Wed May 18 03:14:52 1994 Path: ashpoly!cascade!transat!ukc!fennimore!unam!asokolov From: asokolov@unam.mx (Andrei Sokolov) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994May18.031452.8090@unam.mx> Date: Wed, 18 May 1994 03:14:52 GMT References: <1994May12.172352.7935@u-tokyo.ac.jp> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994May12.172352.7935@u-tokyo.ac.jp>, okim@u-tokyo.ac.jp (Olga Kim) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. > 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. -- Andrei Sokolov -- Universidad Nacional Autónoma de México (DGSCA) "Tape doesn't lie at 02:14. Ears do."