From glarsson@unam.mx Wed Jun 12 05:51:20 1996 Path: ashpoly!cascade!mxgate!coyoacan!unam!glarsson From: glarsson@unam.mx (Graham Larsson) Newsgroups: comp.sys.m68k Subject: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun12.055120.7667@unam.mx> Date: Wed, 12 Jun 1996 05:51:20 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Graham Larsson Opinions expressed are solely my own and not those of Universidad Nacional Autónoma de México (DGSCA). ------------------------------------------------------------ From kpetrov@mindspring.com Thu Jun 13 15:01:20 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!mindspring!kpetrov From: kpetrov@mindspring.com (Karen Petrov) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun13.150120.3007@mindspring.com> Date: Thu, 13 Jun 1996 15:01:20 GMT References: <1996Jun12.055120.7667@unam.mx> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1996Jun12.055120.7667@unam.mx>, glarsson@unam.mx (Graham Larsson) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Karen Petrov Opinions expressed are solely my own and not those of MindSpring Enterprises. ------------------------------------------------------------ From brobertson@kth.se Sat Jun 15 01:22:20 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!kth!brobertson From: brobertson@kth.se (Brian Robertson) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Jun15.012220.2749@kth.se> Date: Sat, 15 Jun 1996 01:22:20 GMT References: <1996Jun12.055120.7667@unam.mx> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Jun12.055120.7667@unam.mx>, glarsson@unam.mx (Graham Larsson) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- Brian Robertson SupraFAXModem 28.8 @ 33,600 bps "The carrier frequency does not drift by accident."