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I Can't Get Interrupts Working: Difference between revisions
→Make sure kernel main doesn't exit
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Each IRQ needs to be acknowledged to the PIC manually by sending an EOI. You need to have <source lang="c"> outb(0x20,0x20) </source> within any master handler and any <source lang="c"> outb(0x20,0x20); outb(0xa0,0x20); </source> within any slave handler.
Also, if you are following the barebones tutorial, be sure that your main function doesn't exit too soon (because when it does, it disables interrupts). A common solution to make sure it doesn't exit prematurely is to add <source lang="c"> for(;;) {
asm("hlt");
} </source>
to your main kernel function. The ''for'' loop is necessary because execution continues after the CPU receives an interrupt.
=== When I try to enable the PIT, the keyboard doesn't work anymore ===
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