From hlopez@earthlink.net Thu Jun 02 11:29:59 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!earthlink!hlopez From: hlopez@earthlink.net (Hugo López) Newsgroups: comp.sys.m68k Subject: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jun02.112959.6609@earthlink.net> Date: Thu, 02 Jun 1994 11:29:59 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Hugo López | hlopez@earthlink.net PGP Key fingerprint: 75CA B705 8889 BED8 "Keep the channels open." From rsantos@utexas.edu Thu Jun 02 23:52:59 1994 Path: ashpoly!cascade!mxgate!coyoacan!utexas!rsantos From: rsantos@utexas.edu (Renata Santos) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jun02.235259.5474@utexas.edu> Date: Thu, 02 Jun 1994 23:52:59 GMT References: <1994Jun02.112959.6609@earthlink.net> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1994Jun02.112959.6609@earthlink.net>, hlopez@earthlink.net (Hugo López) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. Looks like a prototype telecommunications board for military secure voice, not an audio music product. PGP Public key available via finger or upon request. -- === Renata Santos === Dept of Electrical Engineering, University of Texas at Austin "A soul is not exclusive to biology." From tgonzalez@titech.ac.jp Fri Jun 03 17:36:59 1994 Path: ashpoly!cascade!mxgate!coyoacan!titech!tgonzalez From: tgonzalez@titech.ac.jp (Takeshi González) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jun03.173659.8216@titech.ac.jp> Date: Fri, 03 Jun 1994 17:36:59 GMT References: <1994Jun02.112959.6609@earthlink.net> <1994Jun02.235259.5474@utexas.edu> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Jun02.235259.5474@utexas.edu>, rsantos@utexas.edu (Renata Santos) writes: > Looks like a prototype telecommunications board for military secure voice, not an audio music product. > PGP Public key available via finger or upon request. 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. -- === Takeshi González === Dept of Electrical Engineering, Tokyo Institute of Technology Computer Centre "There are 14 nodes and only 10 countries. Count again." From njohansson@kth.se Sat Jun 04 18:59:59 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!kth!njohansson From: njohansson@kth.se (Natalia Johansson) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jun04.185959.4761@kth.se> Date: Sat, 04 Jun 1994 18:59:59 GMT References: <1994Jun02.112959.6609@earthlink.net> <1994Jun02.235259.5474@utexas.edu> <1994Jun03.173659.8216@titech.ac.jp> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Jun03.173659.8216@titech.ac.jp>, tgonzalez@titech.ac.jp (Takeshi González) 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. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- === Natalia Johansson === Dept of Electrical Engineering, Royal Institute of Technology, Stockholm "Hold for relay." From landersson@uni-hamburg.de Mon Jun 06 22:18:59 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!uni-hamburg!landersson From: landersson@uni-hamburg.de (Lars Andersson) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jun06.221859.6265@uni-hamburg.de> Date: Mon, 06 Jun 1994 22:18:59 GMT References: <1994Jun02.112959.6609@earthlink.net> <1994Jun02.235259.5474@utexas.edu> <1994Jun03.173659.8216@titech.ac.jp> <1994Jun04.185959.4761@kth.se> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Jun04.185959.4761@kth.se>, njohansson@kth.se (Natalia Johansson) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Lars Andersson -- Universität Hamburg Fachbereich Informatik "5 sigma is a discovery. 7 is a question."