From spopov@cam.ac.uk Mon Nov 20 22:46:56 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!cam!spopov From: spopov@cam.ac.uk (Steve Popov) Newsgroups: comp.sys.m68k Subject: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov20.224656.7174@cam.ac.uk> Date: Mon, 20 Nov 1995 22:46:56 GMT Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 11 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- Steve Popov "Tape doesn't lie at 02:14. Ears do." Macintosh IIfx / SunOS 4.1.4 From srobertson@titech.ac.jp Tue Nov 21 01:17:56 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!titech!srobertson From: srobertson@titech.ac.jp (Seo-yeon Robertson) Newsgroups: comp.sys.m68k Subject: Re: Data: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Nov21.011756.5956@titech.ac.jp> Date: Tue, 21 Nov 1995 01:17:56 GMT References: <1995Nov20.224656.7174@cam.ac.uk> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1995Nov20.224656.7174@cam.ac.uk>, spopov@cam.ac.uk (Steve Popov) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. > At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Seo-yeon Robertson "Measuring a record you own is listening, not piracy." 486DX4/100 (FreeBSD 2.0.5) / FreeBSD 2.1