1991/0703/pc/io.h (diff list | history)

pc/io.h on 1991/0703
1991/0703		/* * interrupt levels */ enum { Clockvec= 8, Kbdvec= 9, Floppyvec= 14, }; /* * damned 8259, assume DOS sets it up for us */ enum { Intctlport= 0x20, /* 8259 control port */ Intctlmask= 0x21, /* interrupt mask */ Intenable= 0x20, /* written to Intctlport, enables next int */ }; #define INTENABLE outb(Intctlport, Intenable)