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Interfaces and Connectors
EPM-14 Reference Manual
36
CPU Temperature Monitor
A thermometer circuit constantly monitors the die temperature of the CPU. This circuit can be
used to detect over-temperature conditions which can result from fan or heat sink failure or
excessive ambient temperatures.
The system can be configured to generate an interrupt when the temperature exceeds the BIOS
programmed threshold. Contact the factory for information on reading and writing to the
thermometer circuits.
PC/104 Expansion Bus
EPM-14 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 1-3 are
available to ISA when the on-board COM port function is disabled in CMOS Setup.
•
100h – 1CFh
1DFh – 1EFh
200h – 3AFh
3E0h – 3F5h
3F7h – 47Fh
490h – 4CFh
4D2h – 777h
77Ch – AFFh
•
When on-board COM ports are enabled in CMOS Setup: COM1 (0x3F8-0x3FF), COM2
(0x2F8-0x2FF), COM3 (0x3E8-0x3EF).
PC/104
M
EMORY
S
UPPORT
Memory ranges supported:
•
C8000h-DBFFFh
IRQ
S
UPPORT
The following IRQs are available on the PC/104 bus:
•
IRQ 3, IRQ 4, IRQ 5, IRQ 6, IRQ 7, IRQ 9, and IRQ 10
Each of the seven 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. There are three mutually exclusive IRQ domains: PCI, ISA, and on-board COM ports.
DMA
S
UPPORT
The current revision of the board does not support PC/104 DMA.