5-2 CHAPTER 4
5-2 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.
5-3 INTERRUPT MAP
NMI :
Parity check error.
IRQ (H/W) :
0
System TIMER interrupt from TIMER 0.
1
KEYBOARD output buffer full.
2
Cascade for IRQ 8-15.
3
SERIAL port 2.
4
SERIAL port 1.
5
PARALLEL port 2.
6
FLOPPY DISK (SMC CHIP).
7
PARALLEL port 1.
8
RTC clock.
9
Available.
10
Available.
11
Available.
12
PS/2 Mouse.
13
MATH coprocessor.
14
Onboard HARD DISK(IDE1) channel.
15
Onboard HARD DISK(IDE2) channel.
