From rgirard@hanse.de Thu Jan 04 16:52:53 1996 Path: ashpoly!cascade!brgate!saturno!hanse!rgirard From: rgirard@hanse.de (Raj Girard) Newsgroups: comp.sys.m68k Subject: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jan04.165253.5596@hanse.de> Date: Thu, 04 Jan 1996 16:52:53 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] 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. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Raj Girard "Hold for relay." Macintosh IIfx / SunOS 4.1.4 From mlaurent@pipeline.com Fri Jan 05 05:46:53 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!pipeline!mlaurent From: mlaurent@pipeline.com (Matthias Laurent) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jan05.054653.3150@pipeline.com> Date: Fri, 05 Jan 1996 05:46:53 GMT References: <1996Jan04.165253.5596@hanse.de> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Jan04.165253.5596@hanse.de>, rgirard@hanse.de (Raj Girard) 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. The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. -- Matthias Laurent | mlaurent@pipeline.com PGP Key fingerprint: F769 FE21 59FA C4DA "Keep the channels open." From akuznetsov@kth.se Fri Jan 05 07:27:53 1996 Path: ashpoly!cascade!bigsur!kth!akuznetsov From: akuznetsov@kth.se (Andrei Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jan05.072753.6377@kth.se> Date: Fri, 05 Jan 1996 07:27:53 GMT References: <1996Jan04.165253.5596@hanse.de> <1996Jan05.054653.3150@pipeline.com> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1996Jan05.054653.3150@pipeline.com>, mlaurent@pipeline.com (Matthias Laurent) writes: > The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Andrei Kuznetsov Tape trading list upon request. SASE required for international mail. From nramirez@delphi.com Fri Jan 05 13:05:53 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!delphi!nramirez From: nramirez@delphi.com (Nadine Ramírez) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jan05.130553.4122@delphi.com> Date: Fri, 05 Jan 1996 13:05:53 GMT References: <1996Jan04.165253.5596@hanse.de> <1996Jan05.054653.3150@pipeline.com> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Jan05.054653.3150@pipeline.com>, mlaurent@pipeline.com (Matthias Laurent) writes: > The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- === Nadine Ramírez === Dept of Electrical Engineering, Delphi Internet Services "Extraordinary claims require extraordinary spectra." From sito@utexas.edu Fri Jan 05 19:27:53 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!utexas!sito From: sito@utexas.edu (Sven Ito) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jan05.192753.5287@utexas.edu> Date: Fri, 05 Jan 1996 19:27:53 GMT References: <1996Jan04.165253.5596@hanse.de> <1996Jan05.054653.3150@pipeline.com> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 11 In article <1996Jan05.054653.3150@pipeline.com>, mlaurent@pipeline.com (Matthias Laurent) writes: > The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. Looks like a prototype telecommunications board for military secure voice, not an audio music product. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- === Sven Ito === Dept of Electrical Engineering, University of Texas at Austin "When every node is whole, the channel opens."