From gpopov@unam.mx Sat Oct 26 10:26:39 1996 Path: ashpoly!cascade!transat!ukc!fennimore!unam!gpopov From: gpopov@unam.mx (Göran Popov) Newsgroups: comp.sys.m68k Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Oct26.102639.6944@unam.mx> Date: Sat, 26 Oct 1996 10:26:39 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 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'. 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. -- Göran Popov Hayes Optima 288 @ 28,800 bps "Hold for relay." From kmoreau@berkeley.edu Sat Oct 26 12:00:39 1996 Path: ashpoly!cascade!mxgate!coyoacan!berkeley!kmoreau From: kmoreau@berkeley.edu (Kirsty Moreau) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Oct26.120039.2845@berkeley.edu> Date: Sat, 26 Oct 1996 12:00:39 GMT References: <1996Oct26.102639.6944@unam.mx> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1996Oct26.102639.6944@unam.mx>, gpopov@unam.mx (Göran Popov) 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. -- Kirsty Moreau -- UC Berkeley Department of EECS "Extraordinary claims require extraordinary spectra." From eperez@kiae.su Sun Oct 27 12:49:39 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kiae!eperez From: eperez@kiae.su (Élodie Pérez) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Oct27.124939.1997@kiae.su> Date: Sun, 27 Oct 1996 12:49:39 GMT References: <1996Oct26.102639.6944@unam.mx> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Oct26.102639.6944@unam.mx>, gpopov@unam.mx (Göran Popov) 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. -- Élodie Pérez | eperez@kiae.su PGP Key fingerprint: 9F8A 4938 A850 37FB "Keep the channels open." From nnovak@uni-hamburg.de Mon Oct 28 20:21:39 1996 Path: ashpoly!cascade!mxgate!coyoacan!uni-hamburg!nnovak From: nnovak@uni-hamburg.de (Natalia Novak) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Oct28.202139.1297@uni-hamburg.de> Date: Mon, 28 Oct 1996 20:21:39 GMT References: <1996Oct26.102639.6944@unam.mx> <1996Oct26.120039.2845@berkeley.edu> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Oct26.120039.2845@berkeley.edu>, kmoreau@berkeley.edu (Kirsty Moreau) writes: > Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. 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. -- Natalia Novak Opinions expressed are solely my own and not those of Universität Hamburg Fachbereich Informatik. ------------------------------------------------------------ From rweber@mit.edu Wed Oct 30 21:07:39 1996 Path: ashpoly!cascade!transat!ukc!fennimore!mit!rweber From: rweber@mit.edu (Rodrigo Weber) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Oct30.210739.3839@mit.edu> Date: Wed, 30 Oct 1996 21:07:39 GMT References: <1996Oct26.102639.6944@unam.mx> <1996Oct26.120039.2845@berkeley.edu> <1996Oct28.202139.1297@uni-hamburg.de> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Oct28.202139.1297@uni-hamburg.de>, nnovak@uni-hamburg.de (Natalia Novak) writes: > 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. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Rodrigo Weber Opinions expressed are solely my own and not those of Massachusetts Institute of Technology. ------------------------------------------------------------