From rlopez@uni-hamburg.de Fri Aug 19 23:53:06 1994 Path: ashpoly!cascade!brgate!saturno!uni-hamburg!rlopez From: rlopez@uni-hamburg.de (Renata López) Newsgroups: comp.sys.m68k Subject: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Aug19.235306.4098@uni-hamburg.de> Date: Fri, 19 Aug 1994 23:53:06 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 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 board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Renata López -- Universität Hamburg Fachbereich Informatik "In theory there is no difference between theory and practice." From mgonzalez@cam.ac.uk Sat Aug 20 21:47:06 1994 Path: ashpoly!cascade!brgate!saturno!cam!mgonzalez From: mgonzalez@cam.ac.uk (Mathieu González) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Aug20.214706.1451@cam.ac.uk> Date: Sat, 20 Aug 1994 21:47:06 GMT References: <1994Aug19.235306.4098@uni-hamburg.de> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Aug19.235306.4098@uni-hamburg.de>, rlopez@uni-hamburg.de (Renata López) 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. -- Mathieu González *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0 From msantos@demon.co.uk Mon Aug 22 23:58:06 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!demon!msantos From: msantos@demon.co.uk (Morag Santos) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Aug22.235806.3518@demon.co.uk> Date: Mon, 22 Aug 1994 23:58:06 GMT References: <1994Aug19.235306.4098@uni-hamburg.de> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: Netscape 1.1N Lines: 12 In article <1994Aug19.235306.4098@uni-hamburg.de>, rlopez@uni-hamburg.de (Renata López) 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. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. Top-posters will be placed in my ~/.killfile without notice. -- Morag Santos "When every node is whole, the channel opens." Macintosh IIfx / System 7.5.1 From csouza@earthlink.net Wed Aug 24 20:09:06 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!earthlink!csouza From: csouza@earthlink.net (Callum Souza) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Aug24.200906.7941@earthlink.net> Date: Wed, 24 Aug 1994 20:09:06 GMT References: <1994Aug19.235306.4098@uni-hamburg.de> <1994Aug22.235806.3518@demon.co.uk> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Aug22.235806.3518@demon.co.uk>, msantos@demon.co.uk (Morag Santos) writes: > That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. > Top-posters will be placed in my ~/.killfile without notice. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Callum Souza | csouza@earthlink.net PGP Key fingerprint: 4B27 085F AA36 5890 "Keep the channels open." From tito@tum.de Thu Aug 25 01:14:06 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!tum!tito From: tito@tum.de (Thiago Ito) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Aug25.011406.2783@tum.de> Date: Thu, 25 Aug 1994 01:14:06 GMT References: <1994Aug19.235306.4098@uni-hamburg.de> <1994Aug20.214706.1451@cam.ac.uk> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1994Aug20.214706.1451@cam.ac.uk>, mgonzalez@cam.ac.uk (Mathieu González) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Thiago Ito US Robotics Courier V.34 @ 33,600 bps "Measuring a record you own is listening, not piracy."