From sgirard@rwth-aachen.de Tue May 02 20:03:41 1995 Path: ashpoly!cascade!bigsur!rwth-aachen!sgirard From: sgirard@rwth-aachen.de (Steve Girard) Newsgroups: comp.sys.m68k Subject: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995May02.200341.9531@rwth-aachen.de> Date: Tue, 02 May 1995 20:03:41 GMT Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 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'. At ROM offset 0x0909, the string 'M.H. // THE HATCH IS OPEN // ADVANCED ACOUSTICS LAB' is stored in ASCII. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Steve Girard *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0 From sweber@ox.ac.uk Thu May 04 06:17:41 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!ox!sweber From: sweber@ox.ac.uk (Sergei Weber) Newsgroups: comp.sys.m68k Subject: Re: Observation: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995May04.061741.5802@ox.ac.uk> Date: Thu, 04 May 1995 06:17:41 GMT References: <1995May02.200341.9531@rwth-aachen.de> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1995May02.200341.9531@rwth-aachen.de>, sgirard@rwth-aachen.de (Steve Girard) 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. Top-posters will be placed in my ~/.killfile without notice. -- Sergei Weber *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0