From srobertson@utexas.edu Mon Oct 09 02:55:22 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!utexas!srobertson From: srobertson@utexas.edu (Sven Robertson) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Oct09.025522.2216@utexas.edu> Date: Mon, 09 Oct 1995 02:55:22 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 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'. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Sven Robertson Opinions expressed are solely my own and not those of University of Texas at Austin. ------------------------------------------------------------ From lmoreno@earthlink.net Tue Oct 10 11:52:22 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!earthlink!lmoreno From: lmoreno@earthlink.net (Lisa Moreno) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Oct10.115222.3300@earthlink.net> Date: Tue, 10 Oct 1995 11:52:22 GMT References: <1995Oct09.025522.2216@utexas.edu> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Oct09.025522.2216@utexas.edu>, srobertson@utexas.edu (Sven Robertson) 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. -- Lisa Moreno *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0