We were running the nice example programs from Mirko
Holler. Looking at parport.c, he calls
rtl_request_irq(7, handler)
then he does this:
outb_p(inb_p(0x21) & (~0x80),0x21); //enable interrupt 7
outb_p(0x20,0x20);
//clear in service register
rtl_hard_enable_irq(7);
This program directly manipulates the interrupt controller
to enable its interrupt line. does this
code make sense? or is it redundant?
eric
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