Interfaces and Connectors
EBX-11 Reference manual
59
PC/104 Expansion Bus
EBX-11 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.
100h – 1CFh
1DFh – 1EFh
200h – 36Fh
3E8h – 3EFh
3F8h – 47Fh
490h – 4CFh
4D2h – AFFh
When on-board COM ports are disabled in CMOS Setup: COM1 (0x3F8-0x3FF), COM2
(0x2F8-0x2FF), COM3 (0x3E8-0x3EF), COM4 (0x2E8-0x2EF).
PC/104
M
EMORY
S
UPPORT
Memory ranges supported:
D0000h-DBFFFh, 8-bit transfers only
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.
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