From breyes@u-tokyo.ac.jp Sat Mar 25 03:20:53 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!u-tokyo!breyes From: breyes@u-tokyo.ac.jp (Bill Reyes) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar25.032053.1387@u-tokyo.ac.jp> Date: Sat, 25 Mar 1995 03:20:53 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] 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. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Bill Reyes US Robotics Courier V.34 @ ISDN 64k bps "Measuring a record you own is listening, not piracy." From sramirez@ox.ac.uk Sat Mar 25 19:56:53 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!ox!sramirez From: sramirez@ox.ac.uk (Steve Ramírez) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar25.195653.1476@ox.ac.uk> Date: Sat, 25 Mar 1995 19:56:53 GMT References: <1995Mar25.032053.1387@u-tokyo.ac.jp> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Mar25.032053.1387@u-tokyo.ac.jp>, breyes@u-tokyo.ac.jp (Bill Reyes) 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? -- Steve Ramírez *PLONK* filter active for trolls. Decstation 5000/200 - NetBSD 1.0 From dschneider@mindspring.com Mon Mar 27 21:24:53 1995 Path: ashpoly!cascade!transat!ukc!fennimore!mindspring!dschneider From: dschneider@mindspring.com (Dave Schneider) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar27.212453.2244@mindspring.com> Date: Mon, 27 Mar 1995 21:24:53 GMT References: <1995Mar25.032053.1387@u-tokyo.ac.jp> <1995Mar25.195653.1476@ox.ac.uk> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Mar25.195653.1476@ox.ac.uk>, sramirez@ox.ac.uk (Steve Ramírez) writes: > Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- === Dave Schneider === Dept of Electrical Engineering, MindSpring Enterprises "Measuring a record you own is listening, not piracy." From dsokolov@berkeley.edu Tue Mar 28 20:00:53 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!berkeley!dsokolov From: dsokolov@berkeley.edu (Diego Sokolov) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar28.200053.1338@berkeley.edu> Date: Tue, 28 Mar 1995 20:00:53 GMT References: <1995Mar25.032053.1387@u-tokyo.ac.jp> <1995Mar25.195653.1476@ox.ac.uk> <1995Mar27.212453.2244@mindspring.com> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Mar27.212453.2244@mindspring.com>, dschneider@mindspring.com (Dave Schneider) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. 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. -- Diego Sokolov "Hardware is temporary. The signal survives." Amiga 1200 (Blizzard 030/50) / NEXTSTEP 3.3