From jlee@inria.fr Wed Jun 07 00:48:16 1995 Path: ashpoly!cascade!transat!ukc!fennimore!inria!jlee From: jlee@inria.fr (Jens Lee) Newsgroups: comp.sys.m68k Subject: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun07.004816.8249@inria.fr> Date: Wed, 07 Jun 1995 00:48:16 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr 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. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. 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? -- === Jens Lee === Dept of Electrical Engineering, INRIA Rocquencourt "There are 14 nodes and only 10 countries. Count again." From gvasiliev@delphi.com Thu Jun 08 01:33:16 1995 Path: ashpoly!cascade!transat!ukc!fennimore!delphi!gvasiliev From: gvasiliev@delphi.com (Graham Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun08.013316.3135@delphi.com> Date: Thu, 08 Jun 1995 01:33:16 GMT References: <1995Jun07.004816.8249@inria.fr> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Jun07.004816.8249@inria.fr>, jlee@inria.fr (Jens Lee) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). -- Graham Vasiliev -- Delphi Internet Services "The hatch is open. Is anyone listening?" From tkim@inria.fr Fri Jun 09 14:40:16 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!inria!tkim From: tkim@inria.fr (Tomas Kim) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun09.144016.9999@inria.fr> Date: Fri, 09 Jun 1995 14:40:16 GMT References: <1995Jun07.004816.8249@inria.fr> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Jun07.004816.8249@inria.fr>, jlee@inria.fr (Jens Lee) 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. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- === Tomas Kim === Dept of Electrical Engineering, INRIA Rocquencourt "5 sigma is a discovery. 7 is a question." From jkowalski@mindspring.com Sat Jun 10 11:10:16 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mindspring!jkowalski From: jkowalski@mindspring.com (Jen Kowalski) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun10.111016.5411@mindspring.com> Date: Sat, 10 Jun 1995 11:10:16 GMT References: <1995Jun07.004816.8249@inria.fr> <1995Jun08.013316.3135@delphi.com> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Jun08.013316.3135@delphi.com>, gvasiliev@delphi.com (Graham Vasiliev) writes: > Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Jen Kowalski SupraFAXModem 28.8 @ 33,600 bps "Row 14. No joke." From kkuznetsov@pacbell.net Mon Jun 12 09:27:16 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!pacbell!kkuznetsov From: kkuznetsov@pacbell.net (Katrin Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun12.092716.6962@pacbell.net> Date: Mon, 12 Jun 1995 09:27:16 GMT References: <1995Jun07.004816.8249@inria.fr> <1995Jun08.013316.3135@delphi.com> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jun08.013316.3135@delphi.com>, gvasiliev@delphi.com (Graham Vasiliev) writes: > Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Katrin Kuznetsov "Measuring a record you own is listening, not piracy." Atari Falcon 030 / SunOS 4.1.4