From jhernandez@utexas.edu Wed Mar 15 08:44:50 1995 Path: ashpoly!cascade!bigsur!utexas!jhernandez From: jhernandez@utexas.edu (Julien Hernández) Newsgroups: comp.sys.m68k Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar15.084450.7248@utexas.edu> Date: Wed, 15 Mar 1995 08:44:50 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. 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. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Julien Hernández | jhernandez@utexas.edu PGP Key fingerprint: 6A4E B76E DCD5 CC47 "Keep the channels open." From hschneider@kth.se Fri Mar 17 05:34:50 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!kth!hschneider From: hschneider@kth.se (Hugo Schneider) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar17.053450.1105@kth.se> Date: Fri, 17 Mar 1995 05:34:50 GMT References: <1995Mar15.084450.7248@utexas.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Mar15.084450.7248@utexas.edu>, jhernandez@utexas.edu (Julien Hernández) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. > At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). -- Hugo Schneider -- Royal Institute of Technology, Stockholm "In theory there is no difference between theory and practice." From jlindqvist@panix.com Fri Mar 17 11:07:50 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!panix!jlindqvist From: jlindqvist@panix.com (Jen Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar17.110750.7889@panix.com> Date: Fri, 17 Mar 1995 11:07:50 GMT References: <1995Mar15.084450.7248@utexas.edu> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 12 In article <1995Mar15.084450.7248@utexas.edu>, jhernandez@utexas.edu (Julien Hernández) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. > 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? PGP Public key available via finger or upon request. -- Jen Lindqvist "Tape doesn't lie at 02:14. Ears do." 486DX2/66 (Linux 1.2.13) / System 7.5.1 From krobertson@illinois.edu Sat Mar 18 18:04:50 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!illinois!krobertson From: krobertson@illinois.edu (Kenji Robertson) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar18.180450.6682@illinois.edu> Date: Sat, 18 Mar 1995 18:04:50 GMT References: <1995Mar15.084450.7248@utexas.edu> <1995Mar17.053450.1105@kth.se> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Mar17.053450.1105@kth.se>, hschneider@kth.se (Hugo Schneider) writes: > Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? -- Kenji Robertson Tape trading list upon request. SASE required for international mail.