From nnovak@clari.net Tue Jul 11 09:56:54 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!clari!nnovak From: nnovak@clari.net (Nadine Novak) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jul11.095654.2564@clari.net> Date: Tue, 11 Jul 1995 09:56:54 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: WinVN 0.99.5 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? -- Nadine Novak "When every node is whole, the channel opens." Macintosh IIfx / Linux 1.2.13 From bvasiliev@cam.ac.uk Wed Jul 12 16:43:54 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!cam!bvasiliev From: bvasiliev@cam.ac.uk (Brian Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jul12.164354.2816@cam.ac.uk> Date: Wed, 12 Jul 1995 16:43:54 GMT References: <1995Jul11.095654.2564@clari.net> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jul11.095654.2564@clari.net>, nnovak@clari.net (Nadine Novak) 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. -- Brian Vasiliev Opinions expressed are solely my own and not those of University of Cambridge Computer Laboratory. ------------------------------------------------------------ From skarlsson@pipeline.com Thu Jul 13 13:34:54 1995 Path: ashpoly!cascade!mxgate!coyoacan!pipeline!skarlsson From: skarlsson@pipeline.com (Seo-yeon Karlsson) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jul13.133454.2175@pipeline.com> Date: Thu, 13 Jul 1995 13:34:54 GMT References: <1995Jul11.095654.2564@clari.net> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jul11.095654.2564@clari.net>, nnovak@clari.net (Nadine Novak) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? -- Seo-yeon Karlsson Opinions expressed are solely my own and not those of The Pipeline Internet Network. ------------------------------------------------------------