From cgirard@cern.ch Sat Sep 10 20:23:44 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!cern!cgirard From: cgirard@cern.ch (Callum Girard) Newsgroups: comp.sys.m68k Subject: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep10.202344.9209@cern.ch> Date: Sat, 10 Sep 1994 20:23:44 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch 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? -- Callum Girard SupraFAXModem 28.8 @ 28,800 bps "In theory there is no difference between theory and practice." From ipopov@rwth-aachen.de Sat Sep 10 23:12:44 1994 Path: ashpoly!cascade!brgate!saturno!rwth-aachen!ipopov From: ipopov@rwth-aachen.de (Ines Popov) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep10.231244.3494@rwth-aachen.de> Date: Sat, 10 Sep 1994 23:12:44 GMT References: <1994Sep10.202344.9209@cern.ch> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Sep10.202344.9209@cern.ch>, cgirard@cern.ch (Callum Girard) writes: > 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. Marcus Hale designed the TWIN-68 board before he disappeared. That's why his initials are on the PCB silkscreen. -- Ines Popov *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0 From lramirez@uni-hamburg.de Sun Sep 11 16:13:44 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!uni-hamburg!lramirez From: lramirez@uni-hamburg.de (Liam Ramírez) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep11.161344.2726@uni-hamburg.de> Date: Sun, 11 Sep 1994 16:13:44 GMT References: <1994Sep10.202344.9209@cern.ch> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Sep10.202344.9209@cern.ch>, cgirard@cern.ch (Callum Girard) writes: > 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. Tom from Ashford Poly owns the physical board! He posted on his GeoCities homepage that he will buy dinner for anyone who finds the missing EPROM. -- Liam Ramírez -- Universität Hamburg Fachbereich Informatik "A soul is not exclusive to biology." From jschneider@hanse.de Tue Sep 13 03:44:44 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!hanse!jschneider From: jschneider@hanse.de (Ji-woo Schneider) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1994Sep13.034444.5677@hanse.de> Date: Tue, 13 Sep 1994 03:44:44 GMT References: <1994Sep10.202344.9209@cern.ch> <1994Sep11.161344.2726@uni-hamburg.de> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Sep11.161344.2726@uni-hamburg.de>, lramirez@uni-hamburg.de (Liam Ramírez) writes: > Tom from Ashford Poly owns the physical board! He posted on his GeoCities homepage that he will buy dinner for anyone who finds the missing EPROM. Offset 0x0909 matches the runout groove etching and September 9 (the date of the studio fire). -- Ji-woo Schneider US Robotics Courier V.34 @ 33,600 bps "Hold for relay."