Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!usc!wuarchive!emory!gatech!prism!bb16 From: bb16@prism.gatech.EDU (Scott Bostater) Newsgroups: comp.sys.ibm.pc.hardware Subject: Re: HELP: Info on 386 DMA and BUS wanted Message-ID: <18713@hydra.gatech.EDU> Date: 14 Dec 90 21:02:16 GMT References: <7168@chorus.fr> <1990Dec14.191633.5414@beach.csulb.edu> Distribution: comp Organization: Georgia Institute of Technology Lines: 33 In article <1990Dec14.191633.5414@beach.csulb.edu> sichermn@beach.csulb.edu (Jeff Sicherman) writes: > >In article , tas@tasman.cc.utas.edu.au (Tasman Derk Van Ommen) writes: >> Our radioastronomy group is currently interfacing a 386DX PC to some >> custom built hardware. We are looking for a source of technical data >> about DMA and BUS timing and related matters. >> >> We would be happy to buy a book, any suggestions? >> > Consider: > > Interfacing to the IBM Personal Computer (second edition) > Lewis C. Engebrecht (lead designer and architect of original PC) > SAMS > A very dated book. Timing diagrams for the IBM PC only, no mention of the XT or AT, let alone a 386. It's a good reference on how to interface to the the PC bus, but it sure could use an update. My copy was bought in 1989, printed in 1988 and copyrighted 1983. Seven years is a long time for a computer book. You might use the Eggebrecht text and hardware timing diagrams for the Chip's and Technology NEAT chip set. This should give you an idea how the timing relationships change as a function of bus speed. DISCLAIMER: I haven't ever tried to get timing specs from C&T, this is just a guess, but I would expect them to be cooperative. -- Scott Bostater Georgia Tech Research Institute - Radar Systems Analysis "My soul finds rest in God alone; my salvation comes from Him" -Ps 62.1 uucp: ...!{allegra,amd,hplabs,ut-ngp}!gatech!prism!bb16 Internet: bb16@prism.gatech.edu