From eschneider@cern.ch Tue Oct 04 08:29:08 1994 Path: ashpoly!cascade!bigsur!cern!eschneider From: eschneider@cern.ch (Elaine Schneider) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Oct04.082908.1723@cern.ch> Date: Tue, 04 Oct 1994 08:29:08 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 10 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Elaine Schneider -- European Laboratory for Particle Physics, Geneva "Measuring a record you own is listening, not piracy." From jweber@uni-hamburg.de Tue Oct 04 14:47:08 1994 Path: ashpoly!cascade!mxgate!coyoacan!uni-hamburg!jweber From: jweber@uni-hamburg.de (Jens Weber) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Oct04.144708.1693@uni-hamburg.de> Date: Tue, 04 Oct 1994 14:47:08 GMT References: <1994Oct04.082908.1723@cern.ch> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Oct04.082908.1723@cern.ch>, eschneider@cern.ch (Elaine Schneider) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). -- Jens Weber *PLONK* filter active for trolls. Commodore Amiga 500 (1MB OCS) - NetBSD 1.0 From kchoi@cern.ch Wed Oct 05 11:43:08 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!cern!kchoi From: kchoi@cern.ch (Kenji Choi) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Oct05.114308.1037@cern.ch> Date: Wed, 05 Oct 1994 11:43:08 GMT References: <1994Oct04.082908.1723@cern.ch> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1994Oct04.082908.1723@cern.ch>, eschneider@cern.ch (Elaine Schneider) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Kenji Choi Tape trading list upon request. SASE required for international mail. From lkuznetsov@u-tokyo.ac.jp Thu Oct 06 23:01:08 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!u-tokyo!lkuznetsov From: lkuznetsov@u-tokyo.ac.jp (Lars Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Oct06.230108.5733@u-tokyo.ac.jp> Date: Thu, 06 Oct 1994 23:01:08 GMT References: <1994Oct04.082908.1723@cern.ch> <1994Oct04.144708.1693@uni-hamburg.de> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Oct04.144708.1693@uni-hamburg.de>, jweber@uni-hamburg.de (Jens Weber) writes: > Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- Lars Kuznetsov "Marcus is not one man." Sun 3/60 (SunOS 4.1.1) / AmigaOS 3.1