From elopez@delphi.com Fri Feb 25 18:18:13 1994 Path: ashpoly!cascade!transat!ukc!fennimore!delphi!elopez From: elopez@delphi.com (Elaine López) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Feb25.181813.4177@delphi.com> Date: Fri, 25 Feb 1994 18:18:13 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: NewsWatcher 2.0b24 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. 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. -- Elaine López SupraFAXModem 28.8 @ ISDN 64k bps "We don't sign stars. We build them." From ksuzuki@hanse.de Sun Feb 27 05:06:13 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!hanse!ksuzuki From: ksuzuki@hanse.de (Kenji Suzuki) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Feb27.050613.4475@hanse.de> Date: Sun, 27 Feb 1994 05:06:13 GMT References: <1994Feb25.181813.4177@delphi.com> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1994Feb25.181813.4177@delphi.com>, elopez@delphi.com (Elaine López) 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. -- Kenji Suzuki -- Hanse-Netzwerk Hamburg "We don't sign stars. We build them." From nlaurent@berkeley.edu Mon Feb 28 13:02:13 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!berkeley!nlaurent From: nlaurent@berkeley.edu (Nadine Laurent) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Feb28.130213.9283@berkeley.edu> Date: Mon, 28 Feb 1994 13:02:13 GMT References: <1994Feb25.181813.4177@delphi.com> <1994Feb27.050613.4475@hanse.de> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N Lines: 8 In article <1994Feb27.050613.4475@hanse.de>, ksuzuki@hanse.de (Kenji Suzuki) writes: > That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Nadine Laurent Tape trading list upon request. SASE required for international mail. From sgarcia@mindspring.com Tue Mar 01 09:36:13 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!mindspring!sgarcia From: sgarcia@mindspring.com (Sun-mi García) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Mar01.093613.4041@mindspring.com> Date: Tue, 01 Mar 1994 09:36:13 GMT References: <1994Feb25.181813.4177@delphi.com> <1994Feb27.050613.4475@hanse.de> <1994Feb28.130213.9283@berkeley.edu> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Feb28.130213.9283@berkeley.edu>, nlaurent@berkeley.edu (Nadine Laurent) 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. -- Sun-mi García *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0 From twatanabe@earthlink.net Thu Mar 03 03:05:13 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!earthlink!twatanabe From: twatanabe@earthlink.net (Tyler Watanabe) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Mar03.030513.4188@earthlink.net> Date: Thu, 03 Mar 1994 03:05:13 GMT References: <1994Feb25.181813.4177@delphi.com> <1994Feb27.050613.4475@hanse.de> <1994Feb28.130213.9283@berkeley.edu> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Feb28.130213.9283@berkeley.edu>, nlaurent@berkeley.edu (Nadine Laurent) 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. -- Tyler Watanabe | twatanabe@earthlink.net PGP Key fingerprint: 0011 B336 B2E5 0137 "Keep the channels open."