Specifications
Maintenance and Service Guide
6–7
System I/O address specifications
I/O address (hex)
System function (shipping configuration)
000–01F
DMA controller
020–021
Program interrupt controller
024–025
Program interrupt controller
028–029
Program interrupt controller
02C–03D
Program interrupt controller
02E–02F
Motherboard resources
030–031
Program interrupt controller
034–035
Program interrupt controller
038–039
Program interrupt controller
03C–03D
Program interrupt controller
040–043 System
timer
04E–04F Motherboard
resources
050–053 System
timer
060
Standard 101-/102-key or Microsoft natural keyboard
061
Motherboard resources
062
Microsoft ACPI-compliant embedded controller
063
Motherboard resources
064
Standard 101-/102-key or Microsoft natural keyboard
065
Motherboard resources
066
Microsoft ACPI-compliant embedded controller
067
Motherboard resources
070
Motherboard resources
071–077
System CMOS/real-time clock
080
Motherboard resources
081–091
Direct memory access controller
092
Motherboard resources
093–09F
Direct memory access controller
0A0–0A1
Program interrupt controller
0A4–0A5
Program interrupt controller
0A8–0A9
Program interrupt controller
0AC–0AD
Program interrupt controller
0B0–0B1
Program interrupt controller
0B2–0B3
Motherboard resources
0B4–0B5
Program interrupt controller
0B8–0B9
Program interrupt controller
0BC–0BD
Program interrupt controller
(Continued)
