Table of Contents
Advertisement
PC/104 Expansion Bus
EBX-22 has limited support of the PC/104 bus. Most PC/104 cards will work, but be sure to
check the requirements of your PC/104 card against the list below.
PC/104 I/O S
UPPORT
The ISA I/O ranges listed below are supported. The I/O ranges allocated to COM ports 1-4 are
available to ISA when the on-board COM port function is disabled in CMOS Setup.
•
080h
200h – 2EFh
2F8h – 36Fh
3E8h – 3EFh
3F8h – 3FFh
•
Available base I/O addresses for COM ports are: 220h, 228h, 238h, 338h, 3F8h, 2F8h,
3E8h, and 2E8h.
PC/104 M
EMORY
Memory ranges supported:
•
D0000h-DFFFFh, 8 and 16-bit transfers
IRQ S
UPPORT
The following IRQs are available on the PC/104 bus:
•
IRQ 3, IRQ 4, IRQ5, and IRQ 10
Each of the four IRQs must be enabled in CMOS Setup before they can be used on the ISA bus.
Because ISA IRQ sharing is not supported, make sure that any IRQ channel used for an ISA
device is not used elsewhere. For example, if ISA IRQ 4 is enabled, you must use a different IRQ
for COM1.
DMA S
UPPORT
The current revision of the board does not support PC/104 DMA.
EBX-22 Reference Manual
S
UPPORT
Interfaces and Connectors
69
Advertisement
Table of Contents
