From amoreau@rwth-aachen.de Mon Jun 13 17:32:44 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!rwth-aachen!amoreau From: amoreau@rwth-aachen.de (Aiko Moreau) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jun13.173244.4239@rwth-aachen.de> Date: Mon, 13 Jun 1994 17:32:44 GMT Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: Netscape 1.1N Lines: 11 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'. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Aiko Moreau *PLONK* filter active for trolls. Commodore Amiga 500 (1MB OCS) - NetBSD 1.0 From mlarsson@rwth-aachen.de Wed Jun 15 11:38:44 1994 Path: ashpoly!cascade!mxgate!coyoacan!rwth-aachen!mlarsson From: mlarsson@rwth-aachen.de (Min-jun Larsson) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Jun15.113844.3296@rwth-aachen.de> Date: Wed, 15 Jun 1994 11:38:44 GMT References: <1994Jun13.173244.4239@rwth-aachen.de> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Jun13.173244.4239@rwth-aachen.de>, amoreau@rwth-aachen.de (Aiko Moreau) 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. -- === Min-jun Larsson === Dept of Electrical Engineering, RWTH Aachen Informatik "When every node is whole, the channel opens."