From moliveira@cmu.edu Fri Oct 20 06:40:09 1995 Path: ashpoly!cascade!brgate!saturno!cmu!moliveira From: moliveira@cmu.edu (Matthias Oliveira) Newsgroups: comp.sys.m68k Subject: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Oct20.064009.7507@cmu.edu> Date: Fri, 20 Oct 1995 06:40:09 GMT Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 11 Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. 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. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- Matthias Oliveira "The carrier frequency does not drift by accident." Atari Falcon 030 / AmigaOS 3.1 From fstewart@earthlink.net Fri Oct 20 17:26:09 1995 Path: ashpoly!cascade!mxgate!coyoacan!earthlink!fstewart From: fstewart@earthlink.net (Fiona Stewart) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Oct20.172609.2421@earthlink.net> Date: Fri, 20 Oct 1995 17:26:09 GMT References: <1995Oct20.064009.7507@cmu.edu> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Oct20.064009.7507@cmu.edu>, moliveira@cmu.edu (Matthias Oliveira) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. 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. -- Fiona Stewart "Hold for relay." Atari TT030 / Linux 1.2.13 From vperez@titech.ac.jp Sun Oct 22 09:54:09 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!titech!vperez From: vperez@titech.ac.jp (Valeria Pérez) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Oct22.095409.6107@titech.ac.jp> Date: Sun, 22 Oct 1995 09:54:09 GMT References: <1995Oct20.064009.7507@cmu.edu> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Oct20.064009.7507@cmu.edu>, moliveira@cmu.edu (Matthias Oliveira) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- Valeria Pérez -- Tokyo Institute of Technology Computer Centre "Do not worship the copy."