From htakahashi@cmu.edu Tue Jan 04 05:59:15 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!cmu!htakahashi From: htakahashi@cmu.edu (Heather Takahashi) Newsgroups: comp.sys.m68k Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jan04.055915.4997@cmu.edu> Date: Tue, 04 Jan 1994 05:59:15 GMT Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 11 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- Heather Takahashi | htakahashi@cmu.edu PGP Key fingerprint: DB4C 1664 1FEE C372 "Keep the channels open." From jpark@panix.com Wed Jan 05 16:26:15 1994 Path: ashpoly!cascade!bigsur!panix!jpark From: jpark@panix.com (Julien Park) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jan05.162615.4994@panix.com> Date: Wed, 05 Jan 1994 16:26:15 GMT References: <1994Jan04.055915.4997@cmu.edu> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Jan04.055915.4997@cmu.edu>, htakahashi@cmu.edu (Heather Takahashi) 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? -- Julien Park Zyxel U-1496E @ 19,200 bps "Extraordinary claims require extraordinary spectra." From dkim@stanford.edu Fri Jan 07 05:12:15 1994 Path: ashpoly!cascade!brgate!saturno!stanford!dkim From: dkim@stanford.edu (Diego Kim) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jan07.051215.4570@stanford.edu> Date: Fri, 07 Jan 1994 05:12:15 GMT References: <1994Jan04.055915.4997@cmu.edu> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Jan04.055915.4997@cmu.edu>, htakahashi@cmu.edu (Heather Takahashi) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. > Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? -- Diego Kim Tape trading list upon request. SASE required for international mail. From rgirard@earthlink.net Sat Jan 08 01:07:15 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!earthlink!rgirard From: rgirard@earthlink.net (Renata Girard) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jan08.010715.1252@earthlink.net> Date: Sat, 08 Jan 1994 01:07:15 GMT References: <1994Jan04.055915.4997@cmu.edu> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Jan04.055915.4997@cmu.edu>, htakahashi@cmu.edu (Heather Takahashi) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Renata Girard | rgirard@earthlink.net PGP Key fingerprint: 69E0 35A8 A471 7B56 "Keep the channels open." From elindqvist@cam.ac.uk Sat Jan 08 08:53:15 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!cam!elindqvist From: elindqvist@cam.ac.uk (Emi Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jan08.085315.5230@cam.ac.uk> Date: Sat, 08 Jan 1994 08:53:15 GMT References: <1994Jan04.055915.4997@cmu.edu> <1994Jan07.051215.4570@stanford.edu> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Jan07.051215.4570@stanford.edu>, dkim@stanford.edu (Diego Kim) writes: > Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Emi Lindqvist "They will send a copy in my place." Sun SparcStation 20 / System 7.5.1