VIA693/693A 71
16
Base Memory High Byte
17
Extension Memory Low Byte
18
Extension Memory High Byte
19-2D
2E-2F
30
Reserved for Extension Memory Low Byte
31
Reserved for Extension Memory High Byte
33
Information Flag
34-3F
Reserved
40-7F
Reserved for Chipset Setting Data
4-6 ISA I/O Address Map
I/O Address
(HEX)
I/O device
000 - 01F
DMA Controller 1, 8237A-5
020 - 03F
Interrupt Controller 1, 8259A
040 - 05F
System Timer, 8254-2
060 - 06F
8042 Keyboard Controller
070 - 07F
real-time Clock/CMOS and NMI Mask
080 - 09F
DMA Page Register, 74LS612
0A0 - 0BF
Interrupt Controller 2, 8259A
0C0 - 0DF
DMA Controller 2, 8237A-5
0F0 - 0FF
i486 Math Coprocessor
1F0 - 1F8
Fixed Disk Drive Adapter
200 - 207
Game I/O
20C - 20D
Reserved
21F
Reserved
278 - 27F
Parallel Printer Port 2
2B0 - 2DF
Alternate Enhanced Graphic Adapter
2E1
GPIB Adapter 0
2E2 - 2E3
Data Acquisition Adapter 0