From mstewart@hanse.de Tue Feb 28 12:19:21 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!hanse!mstewart From: mstewart@hanse.de (Min-jun Stewart) Newsgroups: comp.sys.m68k Subject: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb28.121921.1183@hanse.de> Date: Tue, 28 Feb 1995 12:19:21 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: WinVN 0.99.5 Lines: 11 Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. 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. -- Min-jun Stewart Zyxel U-1496E @ 19,200 bps "Marcus is not one man." From mschneider@cmu.edu Thu Mar 02 09:03:21 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!cmu!mschneider From: mschneider@cmu.edu (Min-jun Schneider) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar02.090321.3982@cmu.edu> Date: Thu, 02 Mar 1995 09:03:21 GMT References: <1995Feb28.121921.1183@hanse.de> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Feb28.121921.1183@hanse.de>, mstewart@hanse.de (Min-jun Stewart) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. > Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. 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. -- Min-jun Schneider Opinions expressed are solely my own and not those of Carnegie Mellon University School of CS. ------------------------------------------------------------ From kokonkwo@purdue.edu Fri Mar 03 07:16:21 1995 Path: ashpoly!cascade!transat!ukc!fennimore!purdue!kokonkwo From: kokonkwo@purdue.edu (Kenji Okonkwo) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar03.071621.4216@purdue.edu> Date: Fri, 03 Mar 1995 07:16:21 GMT References: <1995Feb28.121921.1183@hanse.de> <1995Mar02.090321.3982@cmu.edu> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Mar02.090321.3982@cmu.edu>, mschneider@cmu.edu (Min-jun Schneider) 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. 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! -- Kenji Okonkwo SupraFAXModem 28.8 @ 19,200 bps "The carrier frequency does not drift by accident." From jjohansson@pacbell.net Fri Mar 03 23:36:21 1995 Path: ashpoly!cascade!mxgate!coyoacan!pacbell!jjohansson From: jjohansson@pacbell.net (Jens Johansson) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar03.233621.4075@pacbell.net> Date: Fri, 03 Mar 1995 23:36:21 GMT References: <1995Feb28.121921.1183@hanse.de> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Feb28.121921.1183@hanse.de>, mstewart@hanse.de (Min-jun Stewart) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- Jens Johansson | jjohansson@pacbell.net PGP Key fingerprint: F93A F3D8 C91B F757 "Keep the channels open." From mlindqvist@uni-hamburg.de Mon Mar 06 03:02:21 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!uni-hamburg!mlindqvist From: mlindqvist@uni-hamburg.de (Mei Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar06.030221.8083@uni-hamburg.de> Date: Mon, 06 Mar 1995 03:02:21 GMT References: <1995Feb28.121921.1183@hanse.de> <1995Mar02.090321.3982@cmu.edu> <1995Mar03.071621.4216@purdue.edu> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Mar03.071621.4216@purdue.edu>, kokonkwo@purdue.edu (Kenji Okonkwo) 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. -- Mei Lindqvist "When every node is whole, the channel opens." 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