Messages in this thread | | | Subject | Re: [PARPORT] Re: problems with parallel port IRQ detection | Date | Sun, 01 Feb 1998 12:35:33 +0000 | From | Philip Blundell <> |
| |
>I have no idea about the parallel port IRQ problem, but the line above >takes the value returned from parport_pc_read_configb(pb) and extracts the >3-bit value stored at bits 3,4, and 5: > >MSB 7 6 5 4 3 2 1 0 LSB > ^ ^ > | | > --------- takes these three bits, and stores the value (range >will be 0-7) in irq
Thanks. I understood that much already. The problem is that I don't know how the contents of the "configB" register is defined and I have no idea whether the bits in question really do constitute a valid magic number to derive an IRQ from.
p.
| |