Specifications

Chapter 3: Operation
13
Toggle Switch
The front-panel toggle switch has these positions:
• Inactive (normal position):
• Reset: Suspends the EPC-6A; releasing the switch causes a hardware reset.
• Abort: Generates the IRQ11 interrupt.
The interrupt position has two purposes. An application program can install an IRQ11
interrupt handler and thus define the switch in an application-specific fashion. The
second purpose is a special interpretation of the switch during BIOS initialization after
a reset.
Moving the switch to the interrupt position during the five-second operator-override
period (when the display shows a circling light), causes the BIOS to load MS-DOS
from ROM and give control to DOS.
Setup Utilities
Unlike other RadiSys products, the EPC-6A uses, as its primary CMOS setup utility, a
remote setup utility (either serial or across the VMEbus) rather than a monitor/keyboard
based approach. This is due to the EPC-6A’s default configuration, where no keyboard or
video is available. For debug purposes, an EXM video card is installed and the PS/2
keyboard port is available. This means you can use the standard Phoenix CMOS setup
utility.
Remote Setup Utility
The EPC-6A has DOS, remote setup, and other utilities located in a read/write flash disk
which (however unlikely) can be corrupted. If the RFA can no longer boot DOS, the
DOS-based setup program is not available.
The remote setup controls a subset of all the possible Phoenix Setup options. Only those
CMOS tokens absolutely necessary for booting are manipulated by the setup utility. The
number of tokens modified are limited to reduce the FFF impact of the EPC-6A versus
EPC-6.
Remote Setup Utility Screens (RSU)
The Remote Setup Utility Screens appear the same, whenever possible, as those of the
EPC-6. Menu selections are driven by typing the character listed in the key column.
Pressing the ESC key from a sub-menu returns to the previous menu. Pressing the ESC
key from the Main Screen starts the exits procedure.