110502
PRODUCT MANUAL EPX-C380
15
FUNCTIONALITY
I/O Port Map
Following is a list of I/O ports used on the EPX-C380. I/O addresses marked with a ** are generally unused and should
be the first choice in I/O address selection for external I/O boards.
NOTE:
The EPX-C380 uses a PnP BIOS resource allocation. Care must be taken to avoid contention with resources
allocated by the BIOS.
HEX Range
Usage
020-03F
8259 Master
040-043
8254 PIT
04E-04F
Reserved for on-board configuration
050-053
8254
060-06F
Keyboard / Mouse Controller
070-07F
CMOS RAM, Clock / Calendar
084-08F
Internal / LPC
0A0-0BF
8259 Slave
0F0-0FF
Math Co-processor
**100-11F
Free
120-12F
Digital I/O
**130-14F
Free
150
Reserved for on-board configuration
**151-16F
Free
170-177
PATA
178-1CF
Free
1D0-1DF
Legacy Watchdog (1D0-Enabled; 1D8 - Pet)
1E8-1EB
Reserved for on-board configuration
1EC
Interrupt Status Register
1ED
Status LED
1EE-1EF
Watchdog Timer Control
1F0-1FF
PATA
**200-2AF
Free
2B0-2DF
Video Controllers
**2E0-2E7
Free
2E8-2EF
COM4 (Default)
**2F0-2F7
Free
2F8-2FF
COM2 (Default)
**300-375
Free
376-377
PATA
378-37B
LPT (Default)
**37C-3AF
Free
3B0-3BB
Video Controllers
**3BC-3BF
Free
3C0-3DF
Video Controllers
**3E0-3E7
Free
3E8-3EF
COM3 (Default)
**3F0-3F7
Free
3F6-3F7
PATA
3F8-3FF
COM1 (Default)
564-568
Advanced Watchdog
CF8-CFF
Internal Control Registers
Preliminary