From ikang@ox.ac.uk Thu Sep 21 17:17:20 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!ox!ikang From: ikang@ox.ac.uk (Ines Kang) Newsgroups: comp.sys.m68k Subject: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Sep21.171720.5846@ox.ac.uk> Date: Thu, 21 Sep 1995 17:17:20 GMT Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: Netscape 1.1N Lines: 11 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. 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. -- Ines Kang *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0 From rkarlsson@pacbell.net Sat Sep 23 00:01:20 1995 Path: ashpoly!cascade!mxgate!coyoacan!pacbell!rkarlsson From: rkarlsson@pacbell.net (Rodrigo Karlsson) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Sep23.000120.9604@pacbell.net> Date: Sat, 23 Sep 1995 00:01:20 GMT References: <1995Sep21.171720.5846@ox.ac.uk> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Sep21.171720.5846@ox.ac.uk>, ikang@ox.ac.uk (Ines Kang) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- === Rodrigo Karlsson === Dept of Electrical Engineering, Pacific Bell Internet Services "Marcus is not one man."