From ssilva@clari.net Sun Nov 03 15:44:11 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!clari!ssilva From: ssilva@clari.net (Seo-yeon Silva) Newsgroups: comp.sys.m68k Subject: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Nov03.154411.2173@clari.net> Date: Sun, 03 Nov 1996 15:44:11 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 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. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Seo-yeon Silva Tape trading list upon request. SASE required for international mail. From lschneider@mit.edu Mon Nov 04 15:03:11 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!mit!lschneider From: lschneider@mit.edu (Lucia Schneider) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Nov04.150311.2148@mit.edu> Date: Mon, 04 Nov 1996 15:03:11 GMT References: <1996Nov03.154411.2173@clari.net> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Nov03.154411.2173@clari.net>, ssilva@clari.net (Seo-yeon Silva) writes: > 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. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Lucia Schneider "A soul is not exclusive to biology." Amiga 3000T / TOS 4.04 From lrobertson@inria.fr Tue Nov 05 22:19:11 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!inria!lrobertson From: lrobertson@inria.fr (Lars Robertson) Newsgroups: comp.sys.m68k Subject: Re: Discussion: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Nov05.221911.7654@inria.fr> Date: Tue, 05 Nov 1996 22:19:11 GMT References: <1996Nov03.154411.2173@clari.net> <1996Nov04.150311.2148@mit.edu> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Nov04.150311.2148@mit.edu>, lschneider@mit.edu (Lucia Schneider) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). -- Lars Robertson *PLONK* filter active for trolls. Atari TT030 - NetBSD 1.0