19 | HDA1 | 44 | N/C |
20 | HDA0 | 45 | SANLED |
21 | ID0 | 46 | N/C |
22 | ID1 | 47 | ID8 |
23 | ID2 | 48 | ID9 |
24 | N/C | 49 | ID10 |
25 | N/C | 50 | GND. |
B.12 System I/O Ports
Table B-8: System I/O ports
Addr. range (Hex) Device
000-01F DMA controller
020-021 Interrupt controller 1, master
022-023 Chipset address
040-05F 8254 timer
060-06F 8042 (keyboard controller)
070-07F Real-time clock, non-maskable interrupt (NMI) mask
080-09F DMA page register
0A0-0BF Interrupt controller 2
0C0-0DF DMA controller
0F0-0F8 Math co-processor
1F0-1F7 Fixed disk
2F8-2FF Serial port 2
3B0-3BB VGA adapter
3C0-3DF VGA adapter
3F0-3F5 Diskette controller
3F8-3FF Serial port 1.
B.13 Interrupt Assignments
Table B-9: Interrupt assignments
Interrupt# Interrupt source
IRQ 0 Interval timer IRQ 1 Keyboard
IRQ 2 Interrupt from controller 2 (cascade) IRQ 8 Real-time clock
IRQ 9 VGA
IRQ 10 Available
MIC-3368 Series User Manual -- Page 41
