From breyes@cern.ch Sat Jul 13 15:16:38 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!cern!breyes From: breyes@cern.ch (Bill Reyes) Newsgroups: comp.sys.m68k Subject: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jul13.151638.8163@cern.ch> Date: Sat, 13 Jul 1996 15:16:38 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: Netscape 1.1N 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'. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- Bill Reyes "5 sigma is a discovery. 7 is a question." Atari Falcon 030 / NEXTSTEP 3.3 From bnilsson@cam.ac.uk Mon Jul 15 01:18:38 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!cam!bnilsson From: bnilsson@cam.ac.uk (Bruno Nilsson) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jul15.011838.6158@cam.ac.uk> Date: Mon, 15 Jul 1996 01:18:38 GMT References: <1996Jul13.151638.8163@cern.ch> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Jul13.151638.8163@cern.ch>, breyes@cern.ch (Bill Reyes) 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. -- Bruno Nilsson "We don't sign stars. We build them." Atari Falcon 030 / FreeBSD 2.1 From asantos@demon.co.uk Tue Jul 16 04:39:38 1996 Path: ashpoly!cascade!brgate!saturno!demon!asantos From: asantos@demon.co.uk (Astrid Santos) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jul16.043938.1879@demon.co.uk> Date: Tue, 16 Jul 1996 04:39:38 GMT References: <1996Jul13.151638.8163@cern.ch> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Jul13.151638.8163@cern.ch>, breyes@cern.ch (Bill Reyes) 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. -- Astrid Santos Tape trading list upon request. SASE required for international mail. From atanaka@cmu.edu Wed Jul 17 13:52:38 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!cmu!atanaka From: atanaka@cmu.edu (Anja Tanaka) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jul17.135238.8895@cmu.edu> Date: Wed, 17 Jul 1996 13:52:38 GMT References: <1996Jul13.151638.8163@cern.ch> <1996Jul16.043938.1879@demon.co.uk> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Jul16.043938.1879@demon.co.uk>, asantos@demon.co.uk (Astrid Santos) writes: > That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Anja Tanaka | atanaka@cmu.edu PGP Key fingerprint: 0DF6 5657 3FDB 2EE9 "Keep the channels open." From pmacdonald@utexas.edu Fri Jul 19 16:57:38 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!utexas!pmacdonald From: pmacdonald@utexas.edu (Pavel MacDonald) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jul19.165738.6095@utexas.edu> Date: Fri, 19 Jul 1996 16:57:38 GMT References: <1996Jul13.151638.8163@cern.ch> <1996Jul15.011838.6158@cam.ac.uk> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Jul15.011838.6158@cam.ac.uk>, bnilsson@cam.ac.uk (Bruno Nilsson) writes: > That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- === Pavel MacDonald === Dept of Electrical Engineering, University of Texas at Austin "Do not worship the copy."