From toliveira@u-tokyo.ac.jp Sun Jul 03 10:40:10 1994 Path: ashpoly!cascade!transat!ukc!fennimore!u-tokyo!toliveira From: toliveira@u-tokyo.ac.jp (Takeshi Oliveira) Newsgroups: comp.sys.m68k Subject: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jul03.104010.7975@u-tokyo.ac.jp> Date: Sun, 03 Jul 1994 10:40:10 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N Lines: 11 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. Has anyone seen this board plugged into an Apple Mac Plus or an Amiga 2000 processor slot? -- Takeshi Oliveira Zyxel U-1496E @ 33,600 bps "Do not worship the copy." From goliveira@panix.com Sun Jul 03 23:56:10 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!panix!goliveira From: goliveira@panix.com (Graham Oliveira) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jul03.235610.9491@panix.com> Date: Sun, 03 Jul 1994 23:56:10 GMT References: <1994Jul03.104010.7975@u-tokyo.ac.jp> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 11 In article <1994Jul03.104010.7975@u-tokyo.ac.jp>, toliveira@u-tokyo.ac.jp (Takeshi Oliveira) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Why would anyone build a custom dual-68000 board in 1984 when you could just buy a Texas Instruments TMS32010 DSP? My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Graham Oliveira *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0 From msato@utexas.edu Tue Jul 05 04:24:10 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!utexas!msato From: msato@utexas.edu (Min-jun Sato) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jul05.042410.4920@utexas.edu> Date: Tue, 05 Jul 1994 04:24:10 GMT References: <1994Jul03.104010.7975@u-tokyo.ac.jp> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Jul03.104010.7975@u-tokyo.ac.jp>, toliveira@u-tokyo.ac.jp (Takeshi Oliveira) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. > The board features two 68000 CPUs clocked at 12 MHz sharing a dual-ported 128KB static RAM bank. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Min-jun Sato "Hardware is temporary. The signal survives." Atari TT030 / System 7.5.1