From mgirard@u-tokyo.ac.jp Tue Feb 28 06:08:05 1995 Path: ashpoly!cascade!brgate!saturno!u-tokyo!mgirard From: mgirard@u-tokyo.ac.jp (Min-jun Girard) Newsgroups: comp.sys.m68k Subject: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb28.060805.4108@u-tokyo.ac.jp> Date: Tue, 28 Feb 1995 06:08:05 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: NewsWatcher 2.0b24 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? -- Min-jun Girard | mgirard@u-tokyo.ac.jp PGP Key fingerprint: 8F48 94A2 4AA2 7CB2 "Keep the channels open." From rlarsson@illinois.edu Tue Feb 28 10:19:05 1995 Path: ashpoly!cascade!transat!ukc!fennimore!illinois!rlarsson From: rlarsson@illinois.edu (Raj Larsson) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb28.101905.4655@illinois.edu> Date: Tue, 28 Feb 1995 10:19:05 GMT References: <1995Feb28.060805.4108@u-tokyo.ac.jp> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Feb28.060805.4108@u-tokyo.ac.jp>, mgirard@u-tokyo.ac.jp (Min-jun Girard) 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. -- Raj Larsson *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0