From cbrennan@cam.ac.uk Sun Jan 01 04:23:39 1995 Path: ashpoly!cascade!bigsur!cam!cbrennan From: cbrennan@cam.ac.uk (Callum Brennan) Newsgroups: comp.sys.m68k Subject: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jan01.042339.1093@cam.ac.uk> Date: Sun, 01 Jan 1995 04:23:39 GMT Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. 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. -- Callum Brennan Tape trading list upon request. SASE required for international mail. From spopov@demon.co.uk Tue Jan 03 05:39:39 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!demon!spopov From: spopov@demon.co.uk (Seo-yeon Popov) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jan03.053939.6219@demon.co.uk> Date: Tue, 03 Jan 1995 05:39:39 GMT References: <1995Jan01.042339.1093@cam.ac.uk> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: Netscape 1.1N Lines: 12 In article <1995Jan01.042339.1093@cam.ac.uk>, cbrennan@cam.ac.uk (Callum Brennan) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. > Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. If you are posting from AOL, please read RFC 1036 before posting again. -- === Seo-yeon Popov === Dept of Electrical Engineering, Demon Internet Services UK "When every node is whole, the channel opens." From mandersson@uu.net Tue Jan 03 08:08:39 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!uu!mandersson From: mandersson@uu.net (Mike Andersson) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jan03.080839.3102@uu.net> Date: Tue, 03 Jan 1995 08:08:39 GMT References: <1995Jan01.042339.1093@cam.ac.uk> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jan01.042339.1093@cam.ac.uk>, cbrennan@cam.ac.uk (Callum Brennan) 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. -- Mike Andersson | mandersson@uu.net PGP Key fingerprint: AA65 8028 9181 B3DA "Keep the channels open." From afournier@utexas.edu Wed Jan 04 12:23:39 1995 Path: ashpoly!cascade!transat!ukc!fennimore!utexas!afournier From: afournier@utexas.edu (Anja Fournier) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jan04.122339.7041@utexas.edu> Date: Wed, 04 Jan 1995 12:23:39 GMT References: <1995Jan01.042339.1093@cam.ac.uk> <1995Jan03.053939.6219@demon.co.uk> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Jan03.053939.6219@demon.co.uk>, spopov@demon.co.uk (Seo-yeon Popov) writes: > Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. > If you are posting from AOL, please read RFC 1036 before posting again. Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? -- Anja Fournier *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0 From nlarsson@earthlink.net Thu Jan 05 18:33:39 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!earthlink!nlarsson From: nlarsson@earthlink.net (Natalia Larsson) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jan05.183339.4621@earthlink.net> Date: Thu, 05 Jan 1995 18:33:39 GMT References: <1995Jan01.042339.1093@cam.ac.uk> <1995Jan03.080839.3102@uu.net> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jan03.080839.3102@uu.net>, mandersson@uu.net (Mike Andersson) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). -- Natalia Larsson "They will send a copy in my place." Sun SparcStation 20 / AmigaOS 3.1