3. When you first power-on your system, invoke the BIOS .i.setup screen; and
change the SLOT 0 FUNCTIONS to INTERNAL CLOCK or EXTERNAL CLOCK (the latter
being the case if you have an external 10 MHz clock source connected to the EPC-
2 front panel).
The setup screen is invoked by pressing the CTRL+ALT+ESC keys
simultaneously. You can do this at the operating-system prompt or when the
power-on selftest screen is cleared after rebooting.
To configure the EPC-2 as not the slot-0 controller, you need to:
1. Set the jumpers as shown in the previous diagram.
2. Install the EPC-2 in other than slot 0 of your VXIbus chassis.
3. When you first power-on your system, invoke the BIOS .i.setup screen; and
change the SLOT 0 FUNCTIONS to NONE.
The setup screen is invoked by pressing the CTRL+ALT+ESC keys
simultaneously. You can do this at the operating-system prompt or when the
power-on selftest screen is cleared after rebooting.
Older Models
To change the configuration of the earlier version of the EPC-2, open the right
cover and set the unit on a static-free surface with the front panel to the
left. There are four .i.jumpers; that need to be set.
.G.EPC2JUMP.EPS;2.75";1.435";Postscript
To change the jumpers, you will need to use needle-nose pliers. Make sure that
you and the pliers are grounded to avoid ESD damage.
After changing the jumpers, follow the procedure above. Note that some earlier
EPC-2s allow invocation of the .i.setup screen; only immediately after the
fixed-disk message appears near the bottom of the initial screen after booting.
Troubleshooting the Configuration Jumpers
There are several readily apparent consequences of incorrectly configuring the
EPC-2. For an EPC-2 physically present in .i.slot 0; in the VXIbus system:
1. If the .i.resource manager; running on the slot 0 controller reports a
system configuration differing widely from the actual configuration (e.g.,
reports no devices found or reports devices in empty slots), the .i.MODID
jumper; (the single jumper) is probably set incorrectly.
2. If the EPC-2's power-on selftest reports a VXI failure, the .i.CLK10
jumpers; could be set incorrectly or the setup parameter SLOT 0 FUNCTIONS could
be incorrect (i.e., set to NONE, or set to EXTERNAL when there is no external
clock source connected).
3. If the CLK10+ and CLK10- signals are not being driven on the backplane,
any of the problems mentioned in the previous point could be the cause.
For an EPC-2 physically present in other than slot 0 in the VXIbus system:
1. If the resource manager could not detect the presence of the EPC-2, the
MODID jumper is set incorrectly.
2. If the EPC-2's power-on selftest reports a VXI failure, the .i.CLK10
jumpers; could be set incorrectly.
3. If multiple masters seem to be using the .i.data transfer bus;
concurrently, or if the 16 MHz .i.SYSCLK; signal on the backplane is out of
spec, the EPC-2's setup parameter SLOT 0 FUNCTIONS could be incorrect (i.e., set
to other than NONE).
4. If the CLK10+ and CLK10- signals on the backplane are out of spec, the
.i.CLK10 jumpers; in the EPC-2 may be set incorrectly.
4. .i.No SYSCLK error;If the EPC-2's power-on selftest reports "TESTING VME
INTERFACE - NO SYSCLK," the slot 0 controller is not generating the 16 MHz
.i.SYSCLK; signal.
EPC-2 Insertion
The EPC-2 is inserted in a VXIbus card cage in the following way:
1. Make sure that power to your VXI system is off. The modules are not
designed to be inserted or removed from live backplanes.
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