From alaurent@unam.mx Mon Jun 12 13:06:44 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!unam!alaurent From: alaurent@unam.mx (Andrei Laurent) Newsgroups: comp.sys.m68k Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun12.130644.8968@unam.mx> Date: Mon, 12 Jun 1995 13:06:44 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 11 Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. 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? -- Andrei Laurent SupraFAXModem 28.8 @ 9600 Telebit bps "5 sigma is a discovery. 7 is a question." From tsanchez@illinois.edu Tue Jun 13 10:08:44 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!illinois!tsanchez From: tsanchez@illinois.edu (Tobias Sánchez) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun13.100844.4557@illinois.edu> Date: Tue, 13 Jun 1995 10:08:44 GMT References: <1995Jun12.130644.8968@unam.mx> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Jun12.130644.8968@unam.mx>, alaurent@unam.mx (Andrei Laurent) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Tobias Sánchez | tsanchez@illinois.edu PGP Key fingerprint: 14B1 5F51 556D D08C "Keep the channels open." From rgarcia@uu.net Tue Jun 13 23:52:44 1995 Path: ashpoly!cascade!mxgate!coyoacan!uu!rgarcia From: rgarcia@uu.net (Renata García) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun13.235244.2978@uu.net> Date: Tue, 13 Jun 1995 23:52:44 GMT References: <1995Jun12.130644.8968@unam.mx> <1995Jun13.100844.4557@illinois.edu> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jun13.100844.4557@illinois.edu>, tsanchez@illinois.edu (Tobias Sánchez) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. > Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Renata García -- UUNET Technologies, Falls Church VA "The carrier frequency does not drift by accident." From tlindqvist@cern.ch Wed Jun 14 15:26:44 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!cern!tlindqvist From: tlindqvist@cern.ch (Tyler Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun14.152644.8824@cern.ch> Date: Wed, 14 Jun 1995 15:26:44 GMT References: <1995Jun12.130644.8968@unam.mx> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Jun12.130644.8968@unam.mx>, alaurent@unam.mx (Andrei Laurent) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. > At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Tyler Lindqvist "A soul is not exclusive to biology." Atari Falcon 030 / System 7.5.1 From pbrennan@hanse.de Thu Jun 15 16:23:44 1995 Path: ashpoly!cascade!transat!ukc!fennimore!hanse!pbrennan From: pbrennan@hanse.de (Pavel Brennan) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun15.162344.8378@hanse.de> Date: Thu, 15 Jun 1995 16:23:44 GMT References: <1995Jun12.130644.8968@unam.mx> <1995Jun13.100844.4557@illinois.edu> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jun13.100844.4557@illinois.edu>, tsanchez@illinois.edu (Tobias Sánchez) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- Pavel Brennan Opinions expressed are solely my own and not those of Hanse-Netzwerk Hamburg. ------------------------------------------------------------