From ktakahashi@clari.net Sun Feb 19 23:04:28 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!clari!ktakahashi From: ktakahashi@clari.net (Kenji Takahashi) Newsgroups: comp.sys.m68k Subject: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb19.230428.3083@clari.net> Date: Sun, 19 Feb 1995 23:04:28 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Kenji Takahashi Zyxel U-1496E @ ISDN 64k bps "Tape doesn't lie at 02:14. Ears do." From bsilva@earthlink.net Tue Feb 21 22:35:28 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!earthlink!bsilva From: bsilva@earthlink.net (Bastien Silva) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb21.223528.1664@earthlink.net> Date: Tue, 21 Feb 1995 22:35:28 GMT References: <1995Feb19.230428.3083@clari.net> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Feb19.230428.3083@clari.net>, ktakahashi@clari.net (Kenji 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? If you are posting from AOL, please read RFC 1036 before posting again. -- Bastien Silva "A soul is not exclusive to biology." Decstation 5000/200 / TOS 4.04 From akim@u-tokyo.ac.jp Thu Feb 23 04:44:28 1995 Path: ashpoly!cascade!mxgate!coyoacan!u-tokyo!akim From: akim@u-tokyo.ac.jp (Andrei Kim) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb23.044428.3912@u-tokyo.ac.jp> Date: Thu, 23 Feb 1995 04:44:28 GMT References: <1995Feb19.230428.3083@clari.net> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Feb19.230428.3083@clari.net>, ktakahashi@clari.net (Kenji Takahashi) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. > The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Andrei Kim | akim@u-tokyo.ac.jp PGP Key fingerprint: 812E 5133 9314 5866 "Keep the channels open."