From lstewart@mit.edu Wed Feb 14 10:11:23 1996 Path: ashpoly!cascade!transat!ukc!fennimore!mit!lstewart From: lstewart@mit.edu (Lisa Stewart) Newsgroups: comp.sys.m68k Subject: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Feb14.101123.2309@mit.edu> Date: Wed, 14 Feb 1996 10:11:23 GMT Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu 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? -- Lisa Stewart "They will send a copy in my place." NeXTstation Turbo Color / NEXTSTEP 3.3 From mreyes@stanford.edu Thu Feb 15 09:24:23 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!stanford!mreyes From: mreyes@stanford.edu (Mathieu Reyes) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Feb15.092423.5517@stanford.edu> Date: Thu, 15 Feb 1996 09:24:23 GMT References: <1996Feb14.101123.2309@mit.edu> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Feb14.101123.2309@mit.edu>, lstewart@mit.edu (Lisa Stewart) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- Mathieu Reyes US Robotics Courier V.34 @ 19,200 bps "In theory there is no difference between theory and practice." From mlee@pacbell.net Thu Feb 15 17:14:23 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!pacbell!mlee From: mlee@pacbell.net (Marta Lee) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Feb15.171423.2450@pacbell.net> Date: Thu, 15 Feb 1996 17:14:23 GMT References: <1996Feb14.101123.2309@mit.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Feb14.101123.2309@mit.edu>, lstewart@mit.edu (Lisa Stewart) writes: > 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. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Marta Lee "Hold for relay." Commodore Amiga 500 (1MB OCS) / NEXTSTEP 3.3 From hgirard@unam.mx Thu Feb 15 20:17:23 1996 Path: ashpoly!cascade!brgate!saturno!unam!hgirard From: hgirard@unam.mx (Hugo Girard) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Feb15.201723.8553@unam.mx> Date: Thu, 15 Feb 1996 20:17:23 GMT References: <1996Feb14.101123.2309@mit.edu> <1996Feb15.092423.5517@stanford.edu> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1996Feb15.092423.5517@stanford.edu>, mreyes@stanford.edu (Mathieu Reyes) writes: > Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Hugo Girard Tape trading list upon request. SASE required for international mail.