From bjohansson@stanford.edu Sun Jun 11 09:39:49 1995 Path: ashpoly!cascade!brgate!saturno!stanford!bjohansson From: bjohansson@stanford.edu (Brian Johansson) Newsgroups: comp.sys.m68k Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun11.093949.9427@stanford.edu> Date: Sun, 11 Jun 1995 09:39:49 GMT Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 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. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Brian Johansson -- Stanford University Computer Systems Lab "5 sigma is a discovery. 7 is a question." From lpetrov@illinois.edu Tue Jun 13 12:03:49 1995 Path: ashpoly!cascade!brgate!saturno!illinois!lpetrov From: lpetrov@illinois.edu (Liam Petrov) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun13.120349.1394@illinois.edu> Date: Tue, 13 Jun 1995 12:03:49 GMT References: <1995Jun11.093949.9427@stanford.edu> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1995Jun11.093949.9427@stanford.edu>, bjohansson@stanford.edu (Brian Johansson) writes: > 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. 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. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Liam Petrov Opinions expressed are solely my own and not those of University of Illinois Urbana-Champaign. ------------------------------------------------------------ From ncampbell@netcom.com Tue Jun 13 17:27:49 1995 Path: ashpoly!cascade!bigsur!netcom!ncampbell From: ncampbell@netcom.com (Natalia Campbell) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun13.172749.9434@netcom.com> Date: Tue, 13 Jun 1995 17:27:49 GMT References: <1995Jun11.093949.9427@stanford.edu> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1995Jun11.093949.9427@stanford.edu>, bjohansson@stanford.edu (Brian Johansson) writes: > 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. 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. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Natalia Campbell Opinions expressed are solely my own and not those of NETCOM On-Line Communication Services. ------------------------------------------------------------ From jrodriguez@uni-hamburg.de Wed Jun 14 07:07:49 1995 Path: ashpoly!cascade!mxgate!coyoacan!uni-hamburg!jrodriguez From: jrodriguez@uni-hamburg.de (Joachim Rodríguez) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun14.070749.7240@uni-hamburg.de> Date: Wed, 14 Jun 1995 07:07:49 GMT References: <1995Jun11.093949.9427@stanford.edu> <1995Jun13.120349.1394@illinois.edu> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: Netscape 1.1N Lines: 12 In article <1995Jun13.120349.1394@illinois.edu>, lpetrov@illinois.edu (Liam Petrov) writes: > 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. > My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). If you are posting from AOL, please read RFC 1036 before posting again. -- === Joachim Rodríguez === Dept of Electrical Engineering, Universität Hamburg Fachbereich Informatik "We don't sign stars. We build them." From lito@titech.ac.jp Wed Jun 14 12:31:49 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!titech!lito From: lito@titech.ac.jp (Lisa Ito) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Jun14.123149.1618@titech.ac.jp> Date: Wed, 14 Jun 1995 12:31:49 GMT References: <1995Jun11.093949.9427@stanford.edu> <1995Jun13.172749.9434@netcom.com> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Jun13.172749.9434@netcom.com>, ncampbell@netcom.com (Natalia Campbell) writes: > 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. > Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- === Lisa Ito === Dept of Electrical Engineering, Tokyo Institute of Technology Computer Centre "A soul is not exclusive to biology."