From veriksson@pipeline.com Sun Oct 09 16:45:38 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!pipeline!veriksson From: veriksson@pipeline.com (Valeria Eriksson) Newsgroups: comp.sys.m68k Subject: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Oct09.164538.9543@pipeline.com> Date: Sun, 09 Oct 1994 16:45:38 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: TIN [version 1.2 PL2] 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. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- Valeria Eriksson SupraFAXModem 28.8 @ 9600 Telebit bps "Row 14. No joke." From spopov@mit.edu Mon Oct 10 09:15:38 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!mit!spopov From: spopov@mit.edu (Seo-yeon Popov) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Oct10.091538.2083@mit.edu> Date: Mon, 10 Oct 1994 09:15:38 GMT References: <1994Oct09.164538.9543@pipeline.com> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Oct09.164538.9543@pipeline.com>, veriksson@pipeline.com (Valeria Eriksson) 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'. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Seo-yeon Popov Tape trading list upon request. SASE required for international mail.