VL-EPIC-25 Reference Manual
27
Interfaces and Connectors
Expansion Buses
Note
Some information in this section may change as the BIOS continues in
development.
PC/104-
P
LUS
(PCI
+
ISA)
AND
PCI-104
(PCI
O
NLY
)
PC/104-
Plus
and PCI-104 modules can be secured directly to the top of the Iguana. Make sure to
correctly configure the slot position jumpers on each PC/104-
Plus
module appropriately. PC/104
(ISA only) modules must not be positioned between the Iguana and any PC/104-
Plus
or PCI-104
modules in the stack.
The VL-EPIC-25 is compliant with revision 2.0 of the PC/104-
Plus
specification and can support
four bus master capable PC/104-
Plus
modules.
The BIOS automatically allocates I/O and memory resources. However, manual PCI Interrupt
routing is used.
The following table shows the maximum PC/104-
Plus
slot power on the Iguana.
Table 5: Maximum PC/104-
Plus
Slot Power
Voltage
Max. Current
+5V
8A
+3.3V
4A
+12V
1A
-12V
0.5A
PC/104
ISA
The Iguana provides full support of the PC/104 bus, with the following exceptions:
-5.0V power is not supplied on J7 pin B5. This pin is not connected.
The ISA bus cannot be mastered by an external module. The Iguana is always the bus
master. The MASTER signal on pin D17 of J8 is not connected.
DMA not supported.
Most PC/104 cards will work, but be sure to check the requirements of your PC/104 card against
the list above.
5
5
