Physical Details
EBX-41 Reference Manual
21
J
UMPER
S
UMMARY
Table 3: Jumper Summary
Jumper
Block
Description
As
Shipped
Page
V1[1-2]
Clear Non-Volatile RAM (NVRAM)
In
– Clear NVRAM
Out
– Normal operation
Note:
Whenever NVRAM cleared it is good practice to clear CMOS
RAM (using Jumper V3) at the same time.
Out
24
V2[1-2]
COM0 RS-422 Rx Termination
In
– 120 Ohm terminated
Out
– COM1 not terminated
In
34
V2[3-4]
COM1 RS-422 Rx Termination
In
– 120 Ohm terminated
Out
– COM2 not terminated
In
34
V2[5-6]
COM2 RS-422 Rx Termination
In
– 120 Ohm terminated
Out
– COM3 not terminated
In
34
V2[7-8]
COM3 RS-422 Rx Termination
In
– 120 Ohm terminated
Out
– COM4 not terminated
In
34
V3
CMOS RAM and Real-time Clock Erase
[1-2] In
– Normal
[2-3] In
– Erase CMOS RAM and real-time clock
Note:
Whenever CMOS RAM is cleared it is good practice to clear
NVRAM (using jumper V1[1-2]) at the same time.
[1-2] In
24
V4
BIOS Force Recovery
In
– Enable
Out
– Disable
Out
—
V5
Jumper block not installed
—
—
V6[1-2]
System BIOS Selector
In
– Primary system BIOS selected
Out
– Secondary system BIOS selected
The Primary system BIOS is field upgradeable using the BIOS upgrade
utility. See
http://www.versalogic.com/private/Copperheadsupport.asp
for more information.
In
60
V6[3-4]
General Purpose Input
In
– Causes the GPI_JMP bit in the BIOS and Jumper Status Register
(BIOSJSR) at I/O port CA2h to
read as ‘1’
Out
– Causes the GPI_JMP bit in the BIOS and Jumper Status Register
(BIOSJSR) at I/O port CA2h to
read as ‘0’
In
60
V7[1-2]
MM# Jumper
In
– Test BIOS
Out
– Normal operation
Out
—
