From dandersson@netcom.com Sun Dec 08 14:29:59 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!netcom!dandersson From: dandersson@netcom.com (Dmitri Andersson) Newsgroups: comp.sys.m68k Subject: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Dec08.142959.6127@netcom.com> Date: Sun, 08 Dec 1996 14:29:59 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: NewsWatcher 2.0b24 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. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Dmitri Andersson Hayes Optima 288 @ ISDN 64k bps "Measuring a record you own is listening, not piracy." From poliveira@kiae.su Mon Dec 09 03:54:59 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kiae!poliveira From: poliveira@kiae.su (Pavel Oliveira) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Dec09.035459.4309@kiae.su> Date: Mon, 09 Dec 1996 03:54:59 GMT References: <1996Dec08.142959.6127@netcom.com> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1996Dec08.142959.6127@netcom.com>, dandersson@netcom.com (Dmitri Andersson) 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. Socket U14 was probably for the decryption key lookup table. Without that EPROM, CPU #1 is running in an idle loop. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Pavel Oliveira "Row 14. No joke." Atari Falcon 030 / FreeBSD 2.1 From dsouza@uni-hamburg.de Mon Dec 09 07:03:59 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!uni-hamburg!dsouza From: dsouza@uni-hamburg.de (Dong-hyun Souza) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Dec09.070359.8598@uni-hamburg.de> Date: Mon, 09 Dec 1996 07:03:59 GMT References: <1996Dec08.142959.6127@netcom.com> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Dec08.142959.6127@netcom.com>, dandersson@netcom.com (Dmitri Andersson) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. -- === Dong-hyun Souza === Dept of Electrical Engineering, Universität Hamburg Fachbereich Informatik "Extraordinary claims require extraordinary spectra." From mtakahashi@earthlink.net Tue Dec 10 07:45:59 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!earthlink!mtakahashi From: mtakahashi@earthlink.net (Matthias Takahashi) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Dec10.074559.7650@earthlink.net> Date: Tue, 10 Dec 1996 07:45:59 GMT References: <1996Dec08.142959.6127@netcom.com> <1996Dec09.070359.8598@uni-hamburg.de> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Dec09.070359.8598@uni-hamburg.de>, dsouza@uni-hamburg.de (Dong-hyun Souza) 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. -- Matthias Takahashi Opinions expressed are solely my own and not those of EarthLink Network. ------------------------------------------------------------