From anovak@earthlink.net Thu Sep 15 20:46:04 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!earthlink!anovak From: anovak@earthlink.net (Aiko Novak) Newsgroups: comp.sys.m68k Subject: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep15.204604.7008@earthlink.net> Date: Thu, 15 Sep 1994 20:46:04 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N Lines: 11 Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. 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. -- Aiko Novak "5 sigma is a discovery. 7 is a question." Sun SparcStation 20 / NEXTSTEP 3.3 From llindqvist@mindspring.com Fri Sep 16 01:47:04 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!mindspring!llindqvist From: llindqvist@mindspring.com (Lucia Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep16.014704.7339@mindspring.com> Date: Fri, 16 Sep 1994 01:47:04 GMT References: <1994Sep15.204604.7008@earthlink.net> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Sep15.204604.7008@earthlink.net>, anovak@earthlink.net (Aiko Novak) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. > At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? -- Lucia Lindqvist US Robotics Courier V.34 @ 14,400 bps "Extraordinary claims require extraordinary spectra." From mdubois@mit.edu Sat Sep 17 19:01:04 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!mit!mdubois From: mdubois@mit.edu (Matthias Dubois) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep17.190104.3935@mit.edu> Date: Sat, 17 Sep 1994 19:01:04 GMT References: <1994Sep15.204604.7008@earthlink.net> <1994Sep16.014704.7339@mindspring.com> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: Netscape 1.1N Lines: 8 In article <1994Sep16.014704.7339@mindspring.com>, llindqvist@mindspring.com (Lucia Lindqvist) writes: > Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. -- Matthias Dubois Tape trading list upon request. SASE required for international mail. From mnovak@kth.se Mon Sep 19 09:38:04 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!kth!mnovak From: mnovak@kth.se (Morag Novak) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep19.093804.4963@kth.se> Date: Mon, 19 Sep 1994 09:38:04 GMT References: <1994Sep15.204604.7008@earthlink.net> <1994Sep16.014704.7339@mindspring.com> <1994Sep17.190104.3935@mit.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1994Sep17.190104.3935@mit.edu>, mdubois@mit.edu (Matthias Dubois) writes: > The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Morag Novak Tape trading list upon request. SASE required for international mail. From lhughes@tum.de Tue Sep 20 08:14:04 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!tum!lhughes From: lhughes@tum.de (Lisa Hughes) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep20.081404.7696@tum.de> Date: Tue, 20 Sep 1994 08:14:04 GMT References: <1994Sep15.204604.7008@earthlink.net> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1994Sep15.204604.7008@earthlink.net>, anovak@earthlink.net (Aiko Novak) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Lisa Hughes -- Technische Universität München "When every node is whole, the channel opens."