Specifications

EPC-2 HARDWARE REFERENCE
VGA MONITOR
VGA monitors are color or gray-scale devices. Use this option to configure the EPC-2
to match your device.
EXM Configuration (EPC-2x only)
A separate setup screen, which is displayed by pressing the specified function key,
contains information about the configuration of the EXM device. The EPC-2x's non-
volatile RAM holds identification and configuration information for an EXM modules.
The EPC-2x can hold only a single EXM module, which is EXM slot 0 (not to be con-
fused with VXI slot 0). EXMs are shipped with a configuration program that allows
you to specify EXM configurations in a symbolic high-level way. In addition, the BIOS
displays the configuration information in low-level hexadecimal format and allows you
to change it.
The first column (ID) is the unique ID expected for an EXM in that slot. FF denotes
none. Other EXMs have unique IDs; for instance the ID of the EXM-1 Ethernet con-
troller is FE and that of the EXM-10 Ethernet controller is F5. The next two columns
are the EXM configuration bytes. The interpretation of the low-order bit of byte 1 is
common for all EXMs: 1 denotes EXM enabled and 0 EXM disabled. The remaining
bits in the configuration bytes are dependent on the specific EXM and are defined in the
EXM manuals.
Normally the EPC-2x is shipped with an EXM installed and configured correctly. If for
some reason you need to configure the EXM, use the EXM setup screen, not the
standalone EXM configuration program. Follow the instructions in the specific EXM
manual, considering the following additional restrictions due to the EPC-2 design:
1. If an interrupt is needed, use only IRQ3.
2. Do not use any DMA channels.
3. Do not select I/O addresses that conflict with those in the EPC-2. A com-
plete list appears in Chapter 4. For instance, I/O addresses in the 300-377
range can be used.
4. If the EXM needs to use memory addresses, they must be in the 0D000-
0DFFF range.
For instance, with an EXM-1, the suggested value for OB1 is 01h (Ethernet protocol) or
03h (802.3 protocol). With an EXM-10, the suggested value for OB1 is 01h (thin
Ethernet cable) or 03h (thick Ethernet cable). For EXM-4, the suggested value for OB1
is 3Bh.
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