From asouza@inria.fr Sat Sep 09 20:39:31 1995 Path: ashpoly!cascade!transat!ukc!fennimore!inria!asouza From: asouza@inria.fr (Anton Souza) Newsgroups: comp.sys.m68k Subject: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Sep09.203931.9600@inria.fr> Date: Sat, 09 Sep 1995 20:39:31 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 11 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. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Anton Souza "The carrier frequency does not drift by accident." Amiga 3000T / System 7.5.1 From rmoreau@delphi.com Mon Sep 11 11:09:31 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!delphi!rmoreau From: rmoreau@delphi.com (Rodrigo Moreau) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Sep11.110931.1011@delphi.com> Date: Mon, 11 Sep 1995 11:09:31 GMT References: <1995Sep09.203931.9600@inria.fr> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Sep09.203931.9600@inria.fr>, asouza@inria.fr (Anton Souza) 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. -- Rodrigo Moreau Opinions expressed are solely my own and not those of Delphi Internet Services. ------------------------------------------------------------ From erobertson@u-tokyo.ac.jp Mon Sep 11 23:33:31 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!u-tokyo!erobertson From: erobertson@u-tokyo.ac.jp (Emi Robertson) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Sep11.233331.7779@u-tokyo.ac.jp> Date: Mon, 11 Sep 1995 23:33:31 GMT References: <1995Sep09.203931.9600@inria.fr> <1995Sep11.110931.1011@delphi.com> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Sep11.110931.1011@delphi.com>, rmoreau@delphi.com (Rodrigo Moreau) 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. -- Emi Robertson -- University of Tokyo Department of Information Science "There are 14 nodes and only 10 countries. Count again." From rhughes@ox.ac.uk Wed Sep 13 00:07:31 1995 Path: ashpoly!cascade!transat!ukc!fennimore!ox!rhughes From: rhughes@ox.ac.uk (Raj Hughes) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Sep13.000731.9524@ox.ac.uk> Date: Wed, 13 Sep 1995 00:07:31 GMT References: <1995Sep09.203931.9600@inria.fr> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Sep09.203931.9600@inria.fr>, asouza@inria.fr (Anton Souza) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? -- Raj Hughes Tape trading list upon request. SASE required for international mail. From hnakamura@unam.mx Thu Sep 14 06:45:31 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!unam!hnakamura From: hnakamura@unam.mx (Hana Nakamura) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Sep14.064531.7268@unam.mx> Date: Thu, 14 Sep 1995 06:45:31 GMT References: <1995Sep09.203931.9600@inria.fr> <1995Sep13.000731.9524@ox.ac.uk> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Sep13.000731.9524@ox.ac.uk>, rhughes@ox.ac.uk (Raj Hughes) writes: > Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? Looks like a prototype telecommunications board for military secure voice, not an audio music product. -- === Hana Nakamura === Dept of Electrical Engineering, Universidad Nacional Autónoma de México (DGSCA) "We don't sign stars. We build them."