From llindqvist@rwth-aachen.de Sun Jun 16 20:37:53 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!rwth-aachen!llindqvist From: llindqvist@rwth-aachen.de (Liam Lindqvist) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun16.203753.4193@rwth-aachen.de> Date: Sun, 16 Jun 1996 20:37:53 GMT Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de 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. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- Liam Lindqvist US Robotics Courier V.34 @ 33,600 bps "We don't sign stars. We build them." From tivanov@hanse.de Tue Jun 18 07:55:53 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!hanse!tivanov From: tivanov@hanse.de (Tyler Ivanov) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun18.075553.3031@hanse.de> Date: Tue, 18 Jun 1996 07:55:53 GMT References: <1996Jun16.203753.4193@rwth-aachen.de> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Jun16.203753.4193@rwth-aachen.de>, llindqvist@rwth-aachen.de (Liam Lindqvist) writes: > 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'. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Tyler Ivanov Hayes Optima 288 @ 19,200 bps "The carrier frequency does not drift by accident." From gsantos@stanford.edu Thu Jun 20 08:10:53 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!stanford!gsantos From: gsantos@stanford.edu (Graham Santos) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun20.081053.5476@stanford.edu> Date: Thu, 20 Jun 1996 08:10:53 GMT References: <1996Jun16.203753.4193@rwth-aachen.de> <1996Jun18.075553.3031@hanse.de> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Jun18.075553.3031@hanse.de>, tivanov@hanse.de (Tyler Ivanov) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- === Graham Santos === Dept of Electrical Engineering, Stanford University Computer Systems Lab "In theory there is no difference between theory and practice."