Page 40
cExpress-HL
6.3
I/O Map
Hex Range
Device
000-01F
DMA controller 1, 8237A-5 equivalent
020-02D and 030-03F
Interrupt controller 1, 8259 equivalent
02E-02F
LPC SIO () configuration index/data registers
040-05F
Timer, 8254-2 equivalent
060, 062, 064, 066, 068-06F
8742 equivalent (keyboard)
061, 063, 065, 067
NMI control and status
070-07F
Real Time Clock Controller( bit 7 -NMI mask)
080-091
DMA page register
092
Reset (Bit 0)/ Fast Gate A20 (Bit 1)
93-9F
DMA page registers continued
0A0-0B1 and 0B4-0BF
Interrupt controller 2, 8259 equivalent
0B2 and 0B3
APM control and status port respectively
0C0-0DF
DMA controller 2, 8237A-5 equivalent
0E0-0EF Available
0F0
Co-processor error register
0F1 N/A
0F2-0F3 N/A
0F4
IDE ID port
0F5-0F7 N/A
0F8
IDE Index port
0F9-0FB N/A
0FC IDE
Data
port
0FD-0FF N/A
100-179 Available
180-181
Default AIM4 SRAM control register (May be remapped)
182-1EF Available
1F0-1F7
Primary IDE Controller (AT Drive)
1FB-22F Available
230 -23F
Available
240 -25F
Serial Port 3/4
260-2F7 Available
2F8-2FF
Serial Port 2
300-36F Available
370-377
Alt. Floppy Disk Controller
378-37F Available
380-3AF Available
3B0-3BB and 3BF
Mono/VGA mode video
