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Chapter 1
I/O Address Map
Hex Range
Device Function
000-01F
DMA Controller-1, 8237
020-027
Interrupt Controller-1 8259
030-037
Interrupt Controller-1 8259
040-047
System Timer (8254-1)
050-057
System Timer (8254-1)
060-06F
Keyboard Controller 8742
070-07F
Real-Time Clock, NMI Mask
080-09F
DMA Page Register 74LS612
Speed Status Register
0A0-0BF
Interrupt Controller-2 8259
0C0-0DF
DMA Controller-2, 8237
0F0
CLEAR Math Co-processor BUSY
0F1
RESET Math Co-processor
0F8-0FF
Math Co-processor
4A0
System I/O Port
Bit 3: Onboard VGA Enable/Disable
1: Disable
0: Enable
Bit 0: Onboard LAN 1 Enable/Disable
Bit 1: Onboard LAN 2 Enable/Disable
1: Disable
0: Enable
Bit 2: Onboard SCSI Enable/Disable
1: Enable
0: Disable
Bit [4:7]: Host Frequency Setting
[0, 0, 1, 1]: 1/5, reset only
[0, 1, 1, 1]: 2/11, 300 MHz
[1, 0, 0, 0]: 1/6, 350 MHz
[0, 0, 0, 1]: 1/4, 400 MHz
[0, 1, 0, 1]: 2/9, 450 MHz
[0, 0, 1, 1]: 1/5, 500 MHz
4A1
SMISW/SCISW/SOFTNMI
BIOS/Password check control
0CF8
PCI Configuration Address Reg
0CFC
PCI Configuration Data Reg
1F0-1F7
Fixed Hard Disk
278-27F
Parallel Port 2
2F8-2FF
Serial Port 2
378-37F
Parallel Port 1
3B0-3BF
Monochrome Display
3C0-3CF
EGA, VGA, SVGA
3D0-3DF
CGA, VGA, SVGA
3F0-3F7
Floppy Disk Controller
3F7-3FF
Serial Port 1
Содержание Altos G710
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