Parallel printer port 1 (LPT2) | |
SDLC, bisynchronous 2 | |
Bisynchronous 1 | |
Monochrome display and printer adapter (LPT1) | |
Reserved | |
Color/graphics monitor adapter | |
Diskette controller | |
Serial port 1 |
B.26 DMA Channel Assignments
Table B.24: DMA channel assignments
Channel Function
0Available
1Available
2Floppy disk
3Available
4Cascade for DMA controller 1
5Available
6Available
7 Available
B.27 Interrupt Assignments
Table B.25: Interrupt assignments
Priority | Interrupt# | Interrupt source |
1 | NMI | Parity error detected |
2 | IRQ0 | Interval timer |
3 | IRQ1 | Keyboard |
- | IRQ2 | Interrupt from controller 2 (cascade) |
4 | IRQ8 | |
5 | IRQ9 | Cascaded to INT 0A (IRQ 2) |
6 | IRQ10 | Available |
7 | IRQ11 | Available |
8 | IRQ12 | PS/2 mouse |
9 | IRQ13 | INT from |
10 | IRQ14 | Fixed disk controller |
11 | IRQ15 | Available |
117 | ChapterB |