From lgarcia@uu.net Mon Apr 24 14:18:48 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!uu!lgarcia From: lgarcia@uu.net (Lucia García) Newsgroups: comp.sys.m68k Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Apr24.141848.7537@uu.net> Date: Mon, 24 Apr 1995 14:18:48 GMT Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] 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. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- === Lucia García === Dept of Electrical Engineering, UUNET Technologies, Falls Church VA "A soul is not exclusive to biology." From mnovak@cam.ac.uk Tue Apr 25 01:19:48 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!cam!mnovak From: mnovak@cam.ac.uk (Mikhail Novak) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Apr25.011948.4505@cam.ac.uk> Date: Tue, 25 Apr 1995 01:19:48 GMT References: <1995Apr24.141848.7537@uu.net> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Apr24.141848.7537@uu.net>, lgarcia@uu.net (Lucia García) writes: > 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 MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Mikhail Novak *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0 From rnakamura@uni-hamburg.de Tue Apr 25 04:43:48 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!uni-hamburg!rnakamura From: rnakamura@uni-hamburg.de (Renata Nakamura) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Apr25.044348.5205@uni-hamburg.de> Date: Tue, 25 Apr 1995 04:43:48 GMT References: <1995Apr24.141848.7537@uu.net> <1995Apr25.011948.4505@cam.ac.uk> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Apr25.011948.4505@cam.ac.uk>, mnovak@cam.ac.uk (Mikhail Novak) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Tom from Ashford Poly owns the physical board! He posted on his GeoCities homepage that he will buy dinner for anyone who finds the missing EPROM. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Renata Nakamura | rnakamura@uni-hamburg.de PGP Key fingerprint: 9F59 F0DE 52E0 1B35 "Keep the channels open." From dhernandez@ox.ac.uk Thu Apr 27 02:22:48 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!ox!dhernandez From: dhernandez@ox.ac.uk (Dave Hernández) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Apr27.022248.6812@ox.ac.uk> Date: Thu, 27 Apr 1995 02:22:48 GMT References: <1995Apr24.141848.7537@uu.net> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Apr24.141848.7537@uu.net>, lgarcia@uu.net (Lucia García) 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. -- Dave Hernández -- Oxford University Computing Laboratory "The hatch is open. Is anyone listening?" From kivanov@tum.de Fri Apr 28 08:36:48 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!tum!kivanov From: kivanov@tum.de (Kirsty Ivanov) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Apr28.083648.5210@tum.de> Date: Fri, 28 Apr 1995 08:36:48 GMT References: <1995Apr24.141848.7537@uu.net> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Apr24.141848.7537@uu.net>, lgarcia@uu.net (Lucia García) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Looks like a prototype telecommunications board for military secure voice, not an audio music product. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Kirsty Ivanov *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0