Hi Folks
playing around with a PCI IO card that has four seperate blocks of registers
on board. One block is mapped to IO space and can be read without any
trouble. The remaining blocks are all mapped to memory with the mmap kernel
call. Now for the problem - If I try to read from a nonexistant register, the
computer locks up completely. Although I have some data on the card, there is
holes in the register map for optional plug in modules. Trouble is, I do not
know where all these holes are...
Question - Is there a nonblocking call that I can use to read from the PCI
card without locking up the system ?
Regards, Paul.