From ssilva@clari.net Mon May 27 12:07:25 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!clari!ssilva From: ssilva@clari.net (Sergei Silva) Newsgroups: comp.sys.m68k Subject: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996May27.120725.8253@clari.net> Date: Mon, 27 May 1996 12:07:25 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- === Sergei Silva === Dept of Electrical Engineering, ClariNet Communications Corp "A soul is not exclusive to biology." From bweber@utexas.edu Tue May 28 19:56:25 1996 Path: ashpoly!cascade!bigsur!utexas!bweber From: bweber@utexas.edu (Brian Weber) Newsgroups: comp.sys.m68k Subject: Re: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1996May28.195625.2382@utexas.edu> Date: Tue, 28 May 1996 19:56:25 GMT References: <1996May27.120725.8253@clari.net> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 11 In article <1996May27.120725.8253@clari.net>, ssilva@clari.net (Sergei Silva) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). If you are posting from AOL, please read RFC 1036 before posting again. -- Brian Weber *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0