From dramirez@mindspring.com Tue Jun 25 19:07:52 1996 Path: ashpoly!cascade!transat!ukc!fennimore!mindspring!dramirez From: dramirez@mindspring.com (Dong-hyun Ramírez) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun25.190752.1550@mindspring.com> Date: Tue, 25 Jun 1996 19:07:52 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 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'. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Dong-hyun Ramírez | dramirez@mindspring.com PGP Key fingerprint: 65FA 6047 4871 7F43 "Keep the channels open." From bstewart@cam.ac.uk Wed Jun 26 12:38:52 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!cam!bstewart From: bstewart@cam.ac.uk (Bastien Stewart) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun26.123852.5949@cam.ac.uk> Date: Wed, 26 Jun 1996 12:38:52 GMT References: <1996Jun25.190752.1550@mindspring.com> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Jun25.190752.1550@mindspring.com>, dramirez@mindspring.com (Dong-hyun Ramírez) 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. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Bastien Stewart | bstewart@cam.ac.uk PGP Key fingerprint: 3086 DD46 8D70 3A94 "Keep the channels open." From cfournier@netcom.com Wed Jun 26 15:44:52 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!netcom!cfournier From: cfournier@netcom.com (Camila Fournier) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun26.154452.2173@netcom.com> Date: Wed, 26 Jun 1996 15:44:52 GMT References: <1996Jun25.190752.1550@mindspring.com> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Jun25.190752.1550@mindspring.com>, dramirez@mindspring.com (Dong-hyun Ramírez) 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. -- Camila Fournier Hayes Optima 288 @ ISDN 64k bps "They will send a copy in my place." From enilsson@uu.net Fri Jun 28 15:23:52 1996 Path: ashpoly!cascade!mxgate!coyoacan!uu!enilsson From: enilsson@uu.net (Élodie Nilsson) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun28.152352.3178@uu.net> Date: Fri, 28 Jun 1996 15:23:52 GMT References: <1996Jun25.190752.1550@mindspring.com> <1996Jun26.154452.2173@netcom.com> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Jun26.154452.2173@netcom.com>, cfournier@netcom.com (Camila Fournier) 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. If you are posting from AOL, please read RFC 1036 before posting again. -- Élodie Nilsson Tape trading list upon request. SASE required for international mail.