| |
Add. range ( HEX ) | Device |
000-01F | DMA controller |
020-021 | Interrupt controller 1, master |
022-023 | Chipset address |
040-05F | Timer |
060-06F | Keyboard controller |
070-07F | Real time clock ( NMI ) |
080-09F | DMA page register |
0A0-0BF | Interrupt controller 2 |
0C0-0DF | DMA controller |
0F0 | Clear math co-processor |
0F1 | Reset math co-processor |
0F8-0FF | Math co-processor |
1F0-1F8 | Fixed disk |
200-207 | Game I/O |
278-27F | Parallel printer port 2 ( LPT3 ) |
290-297 | On-board hardware monitor |
2F8-2FF | Serial port 2 |
300-31F | Prototype card |
360-38F | Reserved |
378-37F | Parallel printer port 1 ( LPT2 ) |
380-38F | SDLC, bisynchronous 2 |
3A0-3AF | bisynchronous 1 |
3B0-3BF | Monochrome displayn and printer adapter ( LPT1 ) |
3C0-3CF | Reserved |
3D0-3DF | Color/graphics monitor adapter |
3F0-3F7 | Diskette controller |
3F8-3FF | Serial port 1 |
443 | Watchdog timer |
DMA CHANNEL ASSIGNMENTS | |
Channel | Function |
0 | Available |
1 | Available |
2 | Floppy disk ( 8 bit transfer ) |
3 | Available |
4 | Cascade for DMA controller 1 |
5 | Available |
6 | Available |
7 | Available |
| ||
Priority | Interrupt | Interrupt source |
1 | NMI | Parity error detected |
2 | IRQ 0 | Interval timer |
3 | IRQ 1 | Keyboard |
- | IRQ 2 | Interrupt from controller 2 ( cascade ) |
4 | IRQ 8 | Real-time clock |
5 | IRQ 9 | Cascaded to INT 0A ( IRQ 2 ) |
6 | IRQ 10 | Available |
7 | IRQ 11 | Available |
8 | IRQ 12 | PS/2 mouse |
9 | IRQ 13 | INT from co-processor |
10 | IRQ 14 | Fixed disk controller |
11 | IRQ 15 | Available |
12 | IRQ 3 | Serial Comunication port 2 |
13 | IRQ 4 | Serial Comunication port 1 |
14 | IRQ 5 | Parellel port 2 |
15 | IRQ 6 | Diskette controller ( FDC ) |
16 | IRQ 7 | Parallel port 1 ( print port ) |