u31b3hs@cip-s07.informatik.rwth-aachen.de (Michael Haardt) (12/04/90)
Hello world! In "Dumb Questions -- IBM Minix" Steve Belczyk writes: >-- The Minix information sheet mentions that the IBM Minix supports > up to three simultaneous users. Is there any way to add two more, > on COM3 and COM4? I had the same problem some time ago. My serial card has a jumper for setting COM3 to IRQ5. It is the only free interrupt from the first interrupt controler in AT and 386 machines. I added driver routines to the kernel, which are nearly exact copies of the routines for COM1 and COM2. You must extend a table of port adresses and setup the interrupt in kernel initialisation. All patches are easy to find, just extend the code for COM1 and COM2. COM4 is a little bit more difficult, because you have to use a free interrupt from the second controler for it. I don't know which patches are required for COM4, sorry. I can't make diffs to the PH kernel, because I hacked the PH kernel with Gordon Irlam's virtual console upgrade. If you want to use this patches, you also have to fix a bug in login.c and ps.c. Michael Haardt email: u31b3hs%cip-s01.informatik.rwth-aachen.de@unido.bitnet Please do not use the adress from the Header. ------------------------------- Namaskaar -----------------------------