EPC-3221 CompactPCI
®
System Controller Board and C1XTN02 Transition I/O Module
12
Service Manual
Step 1: Check Switch Settings
Overview
Check the switch block on the EPC-3221 for proper settings (
Figure 5
).
Switch Block
The switch block contains four switches that you can configure to affect the following items:
•
On-board ROM access
•
CMOS RAM
•
Configuration ports
Settings
Settings for the switches are provided in the following table:
SW1-1
Not Used
SW1-2
On-Board ROM Access
Open / Off
Crisis Recovery mode disabled (default)
Closed / On
Crisis Recovery mode enabled
SW1-3
CMOS RAM
Open / Off
Normal operation of CMOS RAM (default)
Closed / On
Factory default values for the Setup Utility are loaded into CMOS RAM
SW1-4
Configuration Ports
Open / Off
Configuration ports are mapped to I/O address 270–273 (default)
Closed / On
Configuration ports are mapped to I/O address 370–373
The system can operate without Memory Module Bank 0 (DIMM 1) filled. However, the crisis
recovery mode requires Bank 0 to be populated. For more information on memory modules,
see
page 44
.
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