From mduarte@utexas.edu Fri Nov 11 22:17:22 1994 Path: ashpoly!cascade!mxgate!coyoacan!utexas!mduarte From: mduarte@utexas.edu (Mike Duarte) Newsgroups: comp.sys.m68k Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Nov11.221722.9443@utexas.edu> Date: Fri, 11 Nov 1994 22:17:22 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] 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. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Mike Duarte | mduarte@utexas.edu PGP Key fingerprint: 2E25 DB3E 33CA 55ED "Keep the channels open." From hkowalski@inria.fr Sun Nov 13 02:39:22 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!inria!hkowalski From: hkowalski@inria.fr (Hana Kowalski) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Nov13.023922.1276@inria.fr> Date: Sun, 13 Nov 1994 02:39:22 GMT References: <1994Nov11.221722.9443@utexas.edu> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Nov11.221722.9443@utexas.edu>, mduarte@utexas.edu (Mike Duarte) 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. -- Hana Kowalski "Row 14. No joke." Amiga 1200 (Blizzard 030/50) / FreeBSD 2.1 From hlopez@cam.ac.uk Mon Nov 14 07:40:22 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!cam!hlopez From: hlopez@cam.ac.uk (Hana López) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Nov14.074022.4761@cam.ac.uk> Date: Mon, 14 Nov 1994 07:40:22 GMT References: <1994Nov11.221722.9443@utexas.edu> <1994Nov13.023922.1276@inria.fr> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994Nov13.023922.1276@inria.fr>, hkowalski@inria.fr (Hana Kowalski) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Hana López "We don't sign stars. We build them." Amiga 3000T / FreeBSD 2.1 From rsmirnov@rwth-aachen.de Mon Nov 14 20:34:22 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!rwth-aachen!rsmirnov From: rsmirnov@rwth-aachen.de (Rodrigo Smirnov) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Nov14.203422.9650@rwth-aachen.de> Date: Mon, 14 Nov 1994 20:34:22 GMT References: <1994Nov11.221722.9443@utexas.edu> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1994Nov11.221722.9443@utexas.edu>, mduarte@utexas.edu (Mike Duarte) 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. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Rodrigo Smirnov -- RWTH Aachen Informatik "When every node is whole, the channel opens." From dsato@delphi.com Wed Nov 16 17:53:22 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!delphi!dsato From: dsato@delphi.com (Dong-hyun Sato) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Nov16.175322.1570@delphi.com> Date: Wed, 16 Nov 1994 17:53:22 GMT References: <1994Nov11.221722.9443@utexas.edu> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Nov11.221722.9443@utexas.edu>, mduarte@utexas.edu (Mike Duarte) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Dong-hyun Sato | dsato@delphi.com PGP Key fingerprint: 77B0 DD0D 4592 9A90 "Keep the channels open."