Specifications

EPC-21/22 Hardware Reference
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Com1:
Com2:
Toggling these fields enables or disables the Com1 or Com2 ports.
Cache
This field is valid only on the EPC-22. Toggling this field enables or disables the on-
board SRAM cache.
Available EXM Slots
Use the arrow keys to change the displayed number of available EXM slots, or card
cage connectors, in the system's backplane. To determine the correct number of
available EXM slots, count the total number of EXM card edge connectors in the
system's backplane.
As a "worst case" configuration example, if an eight-slot backplane is accidentally set
for only four slots, all EXMs above that fourth slot will not configure. (The only
exception is the video card, which auto-enables to allow for error recovery.)
Continuing with this example, the system would not boot if the boot device was
located above the fourth slot. Information is cleared for the missing four slots, and
must be re-entered once the number of slots is corrected.
EXM Setup Screen
This screen is only of significance if the system contains EXM expansion modules.
The EXM setup screen is used to configure EXM expansion modules in the system.
It is displayed by pressing the F2 function key from the main setup screen. The
EPC's battery-backed RAM holds the identification and configuration information for
the number of available EXM slots entered in the EXM Main Setup Screen. The
BIOS displays the configuration information in hexadecimal format. The EXM Setup
screen for a system with an eight-slot backplane, a six-slot chassis, an
EMC-FDM in slots 6 and 7, and an EPC-22 in slot 0 might resemble the following: