From afournier@tum.de Sat Sep 24 21:17:41 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!tum!afournier From: afournier@tum.de (Andrei Fournier) Newsgroups: comp.sys.m68k Subject: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep24.211741.3563@tum.de> Date: Sat, 24 Sep 1994 21:17:41 GMT Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- Andrei Fournier *PLONK* filter active for trolls. Commodore Amiga 500 (1MB OCS) - NetBSD 1.0 From kcampbell@earthlink.net Mon Sep 26 22:20:41 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!earthlink!kcampbell From: kcampbell@earthlink.net (Kenji Campbell) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep26.222041.3791@earthlink.net> Date: Mon, 26 Sep 1994 22:20:41 GMT References: <1994Sep24.211741.3563@tum.de> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Sep24.211741.3563@tum.de>, afournier@tum.de (Andrei Fournier) 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). -- Kenji Campbell *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0 From meriksson@illinois.edu Wed Sep 28 23:01:41 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!illinois!meriksson From: meriksson@illinois.edu (Min-jun Eriksson) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep28.230141.9178@illinois.edu> Date: Wed, 28 Sep 1994 23:01:41 GMT References: <1994Sep24.211741.3563@tum.de> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Sep24.211741.3563@tum.de>, afournier@tum.de (Andrei Fournier) 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. -- Min-jun Eriksson | meriksson@illinois.edu PGP Key fingerprint: 1ECE 35DD 2B54 97F8 "Keep the channels open." From mnovak@cam.ac.uk Thu Sep 29 06:11:41 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cam!mnovak From: mnovak@cam.ac.uk (Mathieu Novak) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep29.061141.6582@cam.ac.uk> Date: Thu, 29 Sep 1994 06:11:41 GMT References: <1994Sep24.211741.3563@tum.de> <1994Sep26.222041.3791@earthlink.net> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Sep26.222041.3791@earthlink.net>, kcampbell@earthlink.net (Kenji Campbell) writes: > Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Mathieu Novak Tape trading list upon request. SASE required for international mail.