From rkang@kth.se Thu Jun 06 23:55:23 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!kth!rkang From: rkang@kth.se (Renata Kang) Newsgroups: comp.sys.m68k Subject: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun06.235523.6789@kth.se> Date: Thu, 06 Jun 1996 23:55:23 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. 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? -- Renata Kang "Tape doesn't lie at 02:14. Ears do." Atari TT030 / Linux 1.2.13 From dchoi@illinois.edu Sat Jun 08 17:05:23 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!illinois!dchoi From: dchoi@illinois.edu (Dmitri Choi) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun08.170523.5263@illinois.edu> Date: Sat, 08 Jun 1996 17:05:23 GMT References: <1996Jun06.235523.6789@kth.se> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Jun06.235523.6789@kth.se>, rkang@kth.se (Renata Kang) 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. -- Dmitri Choi Opinions expressed are solely my own and not those of University of Illinois Urbana-Champaign. ------------------------------------------------------------ From gkowalski@berkeley.edu Sun Jun 09 00:35:23 1996 Path: ashpoly!cascade!brgate!saturno!berkeley!gkowalski From: gkowalski@berkeley.edu (Graham Kowalski) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun09.003523.7371@berkeley.edu> Date: Sun, 09 Jun 1996 00:35:23 GMT References: <1996Jun06.235523.6789@kth.se> <1996Jun08.170523.5263@illinois.edu> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Jun08.170523.5263@illinois.edu>, dchoi@illinois.edu (Dmitri Choi) 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. -- Graham Kowalski SupraFAXModem 28.8 @ ISDN 64k bps "When every node is whole, the channel opens." From handersson@kth.se Tue Jun 11 03:50:23 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!kth!handersson From: handersson@kth.se (Hana Andersson) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun11.035023.5567@kth.se> Date: Tue, 11 Jun 1996 03:50:23 GMT References: <1996Jun06.235523.6789@kth.se> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1996Jun06.235523.6789@kth.se>, rkang@kth.se (Renata Kang) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. > The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Hana Andersson -- Royal Institute of Technology, Stockholm "Tape doesn't lie at 02:14. Ears do." From yreyes@tum.de Wed Jun 12 16:30:23 1996 Path: ashpoly!cascade!transat!ukc!fennimore!tum!yreyes From: yreyes@tum.de (Yuki Reyes) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun12.163023.5926@tum.de> Date: Wed, 12 Jun 1996 16:30:23 GMT References: <1996Jun06.235523.6789@kth.se> <1996Jun08.170523.5263@illinois.edu> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1996Jun08.170523.5263@illinois.edu>, dchoi@illinois.edu (Dmitri Choi) 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. -- Yuki Reyes Tape trading list upon request. SASE required for international mail.