tomf@snoopy.Colorado.EDU (FREDERICKS THOMAS M) (07/12/90)
I know that the bus in a DN3000 is AT compatible, but can you really put IBM cards in it? I am trying to find out if I can use a data aquisition(sp?) board from a pc in one of our 3000's. If it is possible, would it be hard to do? I guess I would have to write a device driver. Anybody know of any good books for that? Thanks, Tom...
krowitz@RICHTER.MIT.EDU (David Krowitz) (07/12/90)
I have written several I/O drivers for simple AT-bus controllers (Centronics interface cards, mostly). The DN3000's bus works, but does not have an I/O map like the DN3500/4000/4500. This means that DMA transfers must not cross a 1024 byte page boundry, but that it fairly easy to deal with. You will need the GPIO optional product (General Purpose I/O ?) in order to have the necessary insert files for calling the appropiate system services (the PBU_$ calls located in /lib/pbulib and /lib/pbu_int_lib). The manual "Writing Device Drivers with GPIO Calls" comes with the package or it may be ordered seperately (#000959-A00 is the version on my copy). -- David Krowitz krowitz@richter.mit.edu (18.83.0.109) krowitz%richter.mit.edu@eddie.mit.edu krowitz%richter.mit.edu@mitvma.bitnet (in order of decreasing preference)