From msokolov@uu.net Thu Dec 05 08:04:31 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uu!msokolov From: msokolov@uu.net (Mike Sokolov) Newsgroups: comp.sys.m68k Subject: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Dec05.080431.2778@uu.net> Date: Thu, 05 Dec 1996 08:04:31 GMT Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: Netscape 1.1N Lines: 11 Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. 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'. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- Mike Sokolov Zyxel U-1496E @ ISDN 64k bps "Tape doesn't lie at 02:14. Ears do." From dlopez@purdue.edu Fri Dec 06 11:26:31 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!purdue!dlopez From: dlopez@purdue.edu (Dave López) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Dec06.112631.8761@purdue.edu> Date: Fri, 06 Dec 1996 11:26:31 GMT References: <1996Dec05.080431.2778@uu.net> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Dec05.080431.2778@uu.net>, msokolov@uu.net (Mike Sokolov) 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. -- Dave López | dlopez@purdue.edu PGP Key fingerprint: 6CAB 270F 148D 6B0E "Keep the channels open." From tpark@titech.ac.jp Sat Dec 07 06:42:31 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!titech!tpark From: tpark@titech.ac.jp (Tyler Park) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Dec07.064231.2892@titech.ac.jp> Date: Sat, 07 Dec 1996 06:42:31 GMT References: <1996Dec05.080431.2778@uu.net> <1996Dec06.112631.8761@purdue.edu> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Dec06.112631.8761@purdue.edu>, dlopez@purdue.edu (Dave López) 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. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Tyler Park -- Tokyo Institute of Technology Computer Centre "In theory there is no difference between theory and practice."