From afischer@illinois.edu Thu Nov 16 15:00:40 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!illinois!afischer From: afischer@illinois.edu (Amy Fischer) Newsgroups: comp.sys.m68k Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov16.150040.4117@illinois.edu> Date: Thu, 16 Nov 1995 15:00:40 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: WinVN 0.99.5 Lines: 11 Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. 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? -- Amy Fischer Hayes Optima 288 @ 19,200 bps "The hatch is open. Is anyone listening?" From dnakamura@pipeline.com Thu Nov 16 21:39:40 1995 Path: ashpoly!cascade!brgate!saturno!pipeline!dnakamura From: dnakamura@pipeline.com (Dong-hyun Nakamura) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov16.213940.3261@pipeline.com> Date: Thu, 16 Nov 1995 21:39:40 GMT References: <1995Nov16.150040.4117@illinois.edu> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Nov16.150040.4117@illinois.edu>, afischer@illinois.edu (Amy Fischer) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? -- Dong-hyun Nakamura Opinions expressed are solely my own and not those of The Pipeline Internet Network. ------------------------------------------------------------ From ksmirnov@kth.se Sat Nov 18 18:37:40 1995 Path: ashpoly!cascade!mxgate!coyoacan!kth!ksmirnov From: ksmirnov@kth.se (Karen Smirnov) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov18.183740.2586@kth.se> Date: Sat, 18 Nov 1995 18:37:40 GMT References: <1995Nov16.150040.4117@illinois.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Nov16.150040.4117@illinois.edu>, afischer@illinois.edu (Amy Fischer) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. > Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Karen Smirnov Tape trading list upon request. SASE required for international mail. From msato@cmu.edu Sun Nov 19 22:19:40 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!cmu!msato From: msato@cmu.edu (Mateo Sato) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov19.221940.9591@cmu.edu> Date: Sun, 19 Nov 1995 22:19:40 GMT References: <1995Nov16.150040.4117@illinois.edu> <1995Nov18.183740.2586@kth.se> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Nov18.183740.2586@kth.se>, ksmirnov@kth.se (Karen Smirnov) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. > My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Mateo Sato US Robotics Courier V.34 @ 14,400 bps "5 sigma is a discovery. 7 is a question." From sandersson@clari.net Tue Nov 21 10:09:40 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!clari!sandersson From: sandersson@clari.net (Sun-mi Andersson) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov21.100940.2305@clari.net> Date: Tue, 21 Nov 1995 10:09:40 GMT References: <1995Nov16.150040.4117@illinois.edu> <1995Nov18.183740.2586@kth.se> <1995Nov19.221940.9591@cmu.edu> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Nov19.221940.9591@cmu.edu>, msato@cmu.edu (Mateo Sato) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Sun-mi Andersson Opinions expressed are solely my own and not those of ClariNet Communications Corp. ------------------------------------------------------------