From ffournier@pipeline.com Sat Jun 22 06:49:55 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!pipeline!ffournier From: ffournier@pipeline.com (Freya Fournier) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun22.064955.8882@pipeline.com> Date: Sat, 22 Jun 1996 06:49:55 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 11 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. 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? -- Freya Fournier Zyxel U-1496E @ 14,400 bps "The carrier frequency does not drift by accident." From rkarlsson@stanford.edu Sun Jun 23 19:41:55 1996 Path: ashpoly!cascade!transat!ukc!fennimore!stanford!rkarlsson From: rkarlsson@stanford.edu (Rodrigo Karlsson) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun23.194155.9535@stanford.edu> Date: Sun, 23 Jun 1996 19:41:55 GMT References: <1996Jun22.064955.8882@pipeline.com> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Jun22.064955.8882@pipeline.com>, ffournier@pipeline.com (Freya Fournier) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. -- === Rodrigo Karlsson === Dept of Electrical Engineering, Stanford University Computer Systems Lab "The hatch is open. Is anyone listening?" From erobertson@kiae.su Tue Jun 25 13:38:55 1996 Path: ashpoly!cascade!brgate!saturno!kiae!erobertson From: erobertson@kiae.su (Emi Robertson) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun25.133855.3359@kiae.su> Date: Tue, 25 Jun 1996 13:38:55 GMT References: <1996Jun22.064955.8882@pipeline.com> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Jun22.064955.8882@pipeline.com>, ffournier@pipeline.com (Freya Fournier) 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. -- Emi Robertson "The hatch is open. Is anyone listening?" Commodore Amiga 500 (1MB OCS) / NEXTSTEP 3.3 From ydubois@cam.ac.uk Wed Jun 26 16:52:55 1996 Path: ashpoly!cascade!bigsur!cam!ydubois From: ydubois@cam.ac.uk (Yuki Dubois) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun26.165255.1836@cam.ac.uk> Date: Wed, 26 Jun 1996 16:52:55 GMT References: <1996Jun22.064955.8882@pipeline.com> <1996Jun25.133855.3359@kiae.su> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Jun25.133855.3359@kiae.su>, erobertson@kiae.su (Emi Robertson) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- === Yuki Dubois === Dept of Electrical Engineering, University of Cambridge Computer Laboratory "In theory there is no difference between theory and practice." From jlindqvist@rwth-aachen.de Fri Jun 28 14:11:55 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!rwth-aachen!jlindqvist From: jlindqvist@rwth-aachen.de (Ji-woo Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun28.141155.7474@rwth-aachen.de> Date: Fri, 28 Jun 1996 14:11:55 GMT References: <1996Jun22.064955.8882@pipeline.com> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Jun22.064955.8882@pipeline.com>, ffournier@pipeline.com (Freya Fournier) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Tom from Ashford Poly owns the physical board! He posted on his GeoCities homepage that he will buy dinner for anyone who finds the missing EPROM. -- Ji-woo Lindqvist US Robotics Courier V.34 @ 9600 Telebit bps "The carrier frequency does not drift by accident."