Appendix | A2 |
A-3 TIME & DMA CHANNELS MAP
TIME MAP: |
|
|
TIMER | Channel 0 | System timer interrupt. |
TIMER | Channel 1 | DRAM REFRESH request. |
TIMER | Channel 2 | SPEAKER tone generator. |
DMA CHANNELS: |
|
DMA Channel 0 | Available. |
DMA Channel 1 | Onboard ECP (Option). |
DMA Channel 2 | FLOPPY DISK (SMC CHIP). |
DMA Channel 3 | Onboard ECP (default). |
DMA Channel 4 | Cascade for DMA controller 1. |
DMA Channel 5 | Available. |
DMA Channel 6 | Available. |
DMA Channel 7 | Available |
A-4 INTERRUPT MAP
NMI :
Parity check error.
IRQ (H/W):
0System TIMER interrupt from TIMER 0.
1KEYBOARD output buffer full.
2Cascade for IRQ
3SERIAL port 2.
4SERIAL port 1.
5PARALLEL port 2.
6FLOPPY DISK (SMC CHIP).
7 PARALLEL port 1.
8 RTC clock.
9Available.
10Available.
11Available.
12PS/2 Mouse.
13MATH coprocessor.
14Onboard HARD DISK (IDE1) channel.
15Onboard HARD DISK (IDE1) channel.
41
