From sito@u-tokyo.ac.jp Tue Mar 21 05:19:29 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!u-tokyo!sito From: sito@u-tokyo.ac.jp (Sun-mi Ito) Newsgroups: comp.sys.m68k Subject: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar21.051929.6369@u-tokyo.ac.jp> Date: Tue, 21 Mar 1995 05:19:29 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp 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'. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Sun-mi Ito | sito@u-tokyo.ac.jp PGP Key fingerprint: 16D9 9B91 8CF6 77C9 "Keep the channels open." From lkarlsson@illinois.edu Wed Mar 22 07:36:29 1995 Path: ashpoly!cascade!bigsur!illinois!lkarlsson From: lkarlsson@illinois.edu (Lucia Karlsson) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar22.073629.4848@illinois.edu> Date: Wed, 22 Mar 1995 07:36:29 GMT References: <1995Mar21.051929.6369@u-tokyo.ac.jp> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Mar21.051929.6369@u-tokyo.ac.jp>, sito@u-tokyo.ac.jp (Sun-mi Ito) 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'. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- === Lucia Karlsson === Dept of Electrical Engineering, University of Illinois Urbana-Champaign "Hold for relay." From vchoi@clari.net Fri Mar 24 10:59:29 1995 Path: ashpoly!cascade!bigsur!clari!vchoi From: vchoi@clari.net (Valeria Choi) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar24.105929.1162@clari.net> Date: Fri, 24 Mar 1995 10:59:29 GMT References: <1995Mar21.051929.6369@u-tokyo.ac.jp> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Mar21.051929.6369@u-tokyo.ac.jp>, sito@u-tokyo.ac.jp (Sun-mi Ito) 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. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Valeria Choi -- ClariNet Communications Corp "5 sigma is a discovery. 7 is a question." From pwatanabe@hanse.de Sun Mar 26 02:26:29 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!hanse!pwatanabe From: pwatanabe@hanse.de (Pavel Watanabe) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar26.022629.2309@hanse.de> Date: Sun, 26 Mar 1995 02:26:29 GMT References: <1995Mar21.051929.6369@u-tokyo.ac.jp> <1995Mar22.073629.4848@illinois.edu> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Mar22.073629.4848@illinois.edu>, lkarlsson@illinois.edu (Lucia Karlsson) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Looks like a prototype telecommunications board for military secure voice, not an audio music product. PGP Public key available via finger or upon request. -- Pavel Watanabe Practical Peripherals 14.4 @ 33,600 bps "Hardware is temporary. The signal survives." From spopov@mit.edu Sun Mar 26 06:45:29 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!mit!spopov From: spopov@mit.edu (Sun-mi Popov) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar26.064529.4133@mit.edu> Date: Sun, 26 Mar 1995 06:45:29 GMT References: <1995Mar21.051929.6369@u-tokyo.ac.jp> <1995Mar22.073629.4848@illinois.edu> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Mar22.073629.4848@illinois.edu>, lkarlsson@illinois.edu (Lucia Karlsson) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. -- Sun-mi Popov Opinions expressed are solely my own and not those of Massachusetts Institute of Technology. ------------------------------------------------------------