From akarlsson@pacbell.net Mon May 20 11:28:44 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!pacbell!akarlsson From: akarlsson@pacbell.net (Amy Karlsson) Newsgroups: comp.sys.m68k Subject: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996May20.112844.7503@pacbell.net> Date: Mon, 20 May 1996 11:28:44 GMT Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. 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? -- Amy Karlsson Tape trading list upon request. SASE required for international mail. From mpopov@utexas.edu Wed May 22 03:14:44 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!utexas!mpopov From: mpopov@utexas.edu (Marisol Popov) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996May22.031444.2353@utexas.edu> Date: Wed, 22 May 1996 03:14:44 GMT References: <1996May20.112844.7503@pacbell.net> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996May20.112844.7503@pacbell.net>, akarlsson@pacbell.net (Amy Karlsson) writes: > Hardware teardown of the dual-68000 DSP accelerator board used in the Stardust project. > Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. That dual-ported SRAM design is ingenious. It avoids bus arbitration contention between the two 68k processors entirely. -- Marisol Popov *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0