From gmartinez@netcom.com Fri Aug 23 20:28:14 1996 Path: ashpoly!cascade!brgate!saturno!netcom!gmartinez From: gmartinez@netcom.com (Graham Martínez) Newsgroups: comp.sys.m68k Subject: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Aug23.202814.4999@netcom.com> Date: Fri, 23 Aug 1996 20:28:14 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: Netscape 1.1N 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. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Graham Martínez *PLONK* filter active for trolls. Atari TT030 - NetBSD 1.0 From blopez@titech.ac.jp Sat Aug 24 02:25:14 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!titech!blopez From: blopez@titech.ac.jp (Bastien López) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Aug24.022514.4210@titech.ac.jp> Date: Sat, 24 Aug 1996 02:25:14 GMT References: <1996Aug23.202814.4999@netcom.com> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Aug23.202814.4999@netcom.com>, gmartinez@netcom.com (Graham Martínez) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- === Bastien López === Dept of Electrical Engineering, Tokyo Institute of Technology Computer Centre "Hardware is temporary. The signal survives." From mmacdonald@berkeley.edu Sat Aug 24 22:59:14 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!berkeley!mmacdonald From: mmacdonald@berkeley.edu (Mathieu MacDonald) Newsgroups: comp.sys.m68k Subject: Re: Question: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996Aug24.225914.6215@berkeley.edu> Date: Sat, 24 Aug 1996 22:59:14 GMT References: <1996Aug23.202814.4999@netcom.com> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Aug23.202814.4999@netcom.com>, gmartinez@netcom.com (Graham Martínez) 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). -- Mathieu MacDonald *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0