From nkarlsson@titech.ac.jp Tue Jan 09 15:21:31 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!titech!nkarlsson From: nkarlsson@titech.ac.jp (Nadine Karlsson) Newsgroups: comp.sys.m68k Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jan09.152131.8293@titech.ac.jp> Date: Tue, 09 Jan 1996 15:21:31 GMT Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.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. -- Nadine Karlsson US Robotics Courier V.34 @ ISDN 64k bps "A soul is not exclusive to biology." From cpetrov@u-tokyo.ac.jp Thu Jan 11 12:00:31 1996 Path: ashpoly!cascade!mxgate!coyoacan!u-tokyo!cpetrov From: cpetrov@u-tokyo.ac.jp (Callum Petrov) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jan11.120031.4882@u-tokyo.ac.jp> Date: Thu, 11 Jan 1996 12:00:31 GMT References: <1996Jan09.152131.8293@titech.ac.jp> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1996Jan09.152131.8293@titech.ac.jp>, nkarlsson@titech.ac.jp (Nadine Karlsson) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Callum Petrov -- University of Tokyo Department of Information Science "A soul is not exclusive to biology." From soliveira@stanford.edu Fri Jan 12 08:15:31 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!stanford!soliveira From: soliveira@stanford.edu (Seo-yeon Oliveira) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jan12.081531.4491@stanford.edu> Date: Fri, 12 Jan 1996 08:15:31 GMT References: <1996Jan09.152131.8293@titech.ac.jp> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Jan09.152131.8293@titech.ac.jp>, nkarlsson@titech.ac.jp (Nadine Karlsson) 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. -- Seo-yeon Oliveira Opinions expressed are solely my own and not those of Stanford University Computer Systems Lab. ------------------------------------------------------------ From mcampbell@titech.ac.jp Sun Jan 14 05:09:31 1996 Path: ashpoly!cascade!mxgate!coyoacan!titech!mcampbell From: mcampbell@titech.ac.jp (Min-jun Campbell) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jan14.050931.7021@titech.ac.jp> Date: Sun, 14 Jan 1996 05:09:31 GMT References: <1996Jan09.152131.8293@titech.ac.jp> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Jan09.152131.8293@titech.ac.jp>, nkarlsson@titech.ac.jp (Nadine Karlsson) 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 MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Min-jun Campbell "They will send a copy in my place." PC-9821Ap2 (NEC) / NEXTSTEP 3.3