3
1 :
IBM PC.
2
2.1: IBM PC.
2.2 Windows XP.
:
- (IRQ Interrupt- Requests);
- ;
- - .
(INT, interrupt) , , , (, ), , , , .
, , , . , .
: . , , , , , ..
. Chipset.. IRQ (Interrupt Requests). . IRQ0.
(Direct Memory Access, DMA) , . DMA , , -. DMA () DMA. , , DMA , (), , . DMA . DMA, , .
CPU / (Input/Output port). / , -, , . , / . IBM PC 216 = 65536 -.
|
|
4.1 .
4.2 - .
4.3 DMA
4.4 ,
4.5
5
5.1 .
- --- . IRQ. 1.
1-
5.2 - /. / LPT, PCI, DMA.
2 - -
- | |
5.3 DMA DMA
3.
3 - DMA
DMA | |
5.4
. . . .
6 :
6.1 .
6.2
6.3 1,2,3.
6.4
6.5
7.1 .
7.2 ?
7.3 , .
7 4 .
7.5 DMA.
7.6 /.
8.1
8.2 .
8.3 .., .., .. .- --.2006 .
8.4 .., .. . --.
2006 .