Dma Channel Map; I/O Address Map - Acer 390 Series Service Manual

1.4.3

DMA Channel Map

Table 1-5

DMA Channel Map

Controller
1
1
1
1
2
2
2
2
1.4.4

I/O Address Map

Table 1-6

I/O Address Map

Address Range
000 - 00F
020 - 021
040 - 043
048 - 04B
060 - 06E
070 - 071
080 - 08F
0A0 - 0A1
0C0 - 0DF
1F0 - 1F7
220 - 22F
230 - 23F
240 - 24F
250 - 25F
278 - 27F
2E8 - 2EF
2F8 - 2FF
378, 37A
3BC - 3BE
3B4, 3B5, 3BA
3C0 - 3C5
3C6 - 3C9
3C0 - 3CF
3D0 - 3DF
3E0 - 3E1
3E8 - 3EF
3F0 - 3F7
3F8 - 3FF
CF8 - CFF
1-10
Channel
0
1
2
3
4
5
6
7
DMA controller-1
Interrupt controller-1
Timer 1
Timer 2
Keyboard controller 8742 chip select
Real-time clock and NMI mask
DMA page register
Interrupt controller-2
DMA controller-2
Hard disk select
Audio (option) - default
Audio (option)
Audio (option)
Audio (option)
Parallel port 3
COM 4
COM 2
Parallel port 2
Parallel port 1
Video subsystem
Video subsystem
Video DAC
Enhanced graphics display
Color graphics adapter
PCMCIA controller
COM3
Floppy disk controller
COM 1
PCI configuration register
Address
0087
0083
0081
0082
Cascade
008B
0089
008A
Device
Function
Audio (option) / Audio
Audio (option) / ECP / Audio / FIR
Diskette
Audio (option) / ECP / FIR
Cascade
Not support
Not support
Not support / Audio
Service Guide