1991/0731/pc/io.h (diff list | history)

1991/0730/sys/src/9/pc/io.h:1,31 – 1991/0731/sys/src/9/pc/io.h:1,16 (short | long | prev | next)
1991/0703		/*
1991/0709		* programmable interrupt vectors (for the 8259)
1991/0731		* programmable interrupt vectors (for the 8259's)
1991/0703		*/
1991/0704		enum {
1991/0710		Faultvec= 14, /* page fault */
1991/0706		Int0vec= 16, /* first interrupt vector used by the 8259 */
1991/0704		Clockvec= Int0vec+0, /* clock interrupts */ Kbdvec= Int0vec+1, /* keyboard interrupts */
1991/0730		Mousevec= Int0vec+12, /* mouse interrupt */
1991/0703		};                  /*
1991/0704		* 8237 dma controllers */ enum { /* * the byte registers for DMA0 are all one byte apart */ Dma0= 0x00, Dma0status= Dma0+0x8, /* status port */ Dma0reset= Dma0+0xD, /* reset port */                  /* * the byte registers for DMA1 are all two bytes apart (why?) */ Dma1= 0xC0, Dma1status= Dma1+2*0x8, /* status port */
1991/0705		Dma1reset= Dma1+2*0xD, /* reset port */
1991/0731		Int0vec= 16, /* first 8259 */ Clockvec= Int0vec+0, /* clock interrupts */ Kbdvec= Int0vec+1, /* keyboard interrupts */ ComBvec= Int0vec+3, /* inerrupt from uart b */ ComAvec= Int0vec+4, /* inerrupt from uart a */ Floppyvec= Int0vec+6, /* floppy interrupts */ Int1vec= Int0vec+8, /* second 8259 */ Mousevec= Int1vec+4, /* mouse interrupt */ Hardvec= Int1vec+6, /* hard disk */
1991/0704		};