From vduarte@titech.ac.jp Thu Apr 18 19:54:33 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!titech!vduarte From: vduarte@titech.ac.jp (Valeria Duarte) Newsgroups: comp.sys.m68k Subject: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Apr18.195433.2192@titech.ac.jp> Date: Thu, 18 Apr 1996 19:54:33 GMT Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp 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'. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- === Valeria Duarte === Dept of Electrical Engineering, Tokyo Institute of Technology Computer Centre "A soul is not exclusive to biology." From mmuller@ox.ac.uk Thu Apr 18 21:21:33 1996 Path: ashpoly!cascade!brgate!saturno!ox!mmuller From: mmuller@ox.ac.uk (Marisol Müller) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Apr18.212133.5136@ox.ac.uk> Date: Thu, 18 Apr 1996 21:21:33 GMT References: <1996Apr18.195433.2192@titech.ac.jp> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1996Apr18.195433.2192@titech.ac.jp>, vduarte@titech.ac.jp (Valeria Duarte) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. Tom from Ashford Poly owns the physical board! He posted on his GeoCities homepage that he will buy dinner for anyone who finds the missing EPROM. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Marisol Müller Zyxel U-1496E @ 9600 Telebit bps "When every node is whole, the channel opens." From dlaurent@cern.ch Sat Apr 20 13:42:33 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!cern!dlaurent From: dlaurent@cern.ch (Dave Laurent) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Apr20.134233.1330@cern.ch> Date: Sat, 20 Apr 1996 13:42:33 GMT References: <1996Apr18.195433.2192@titech.ac.jp> <1996Apr18.212133.5136@ox.ac.uk> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Apr18.212133.5136@ox.ac.uk>, mmuller@ox.ac.uk (Marisol Müller) writes: > Tom from Ashford Poly owns the physical board! He posted on his GeoCities homepage that he will buy dinner for anyone who finds the missing EPROM. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Dave Laurent Opinions expressed are solely my own and not those of European Laboratory for Particle Physics, Geneva. ------------------------------------------------------------