Ampro Corporation 420 - Manual (Page 48)

Chapter 3 Hardware
42 Reference Manual CoreModule 420
Oops! Jumper (BIOS Recovery)
The Oops! jumper is provided in the event you’ve selected BIOS settings that prevent you from booting
the system. By using the Oops! jumper you can stop the current BIOS settings in the CMOS from being
loaded, allowing you to proceed, using the default settings. Connect the DTR pin to the RI pin on Serial
port 1 (COM 1) prior to boot up to prevent the present BIOS settings from loading. After booting with
the Oops! jumper in place, remove the Oops! jumper and go into BIOS Setup.
To restore your BIOS setting changes without the errors, you must first select Load Factory Default
Settings, which will automatically load and save the defaults and reboot the system. Then you can
modify the default settings to your desired values. Ensure you save the changes before rebooting the
system.
NOTE Serial Port 1 (J3) is a 10-pin header and uses pin 7 = DTR and pin 8
= Ri for the Oops! Jumper. At Serial Port 1, short pin 7 to 8, as
shown in Figure 3-2. Alternatively, you may short the equivalent
pins on the DB9 connector attached to Serial Port 1 as shown in
Figure 3-2.
C
M
420O
o
p
s
!j
u
m
p
Standard DB9 Serial
Port Connector (Female)
Rear View
Serial Port 1 (J3)
(COM1)
Side View
Or
5 4 3 2 1
9 8 7 6
Figure 3-2. Oops! Jumper
Serial Console
The CoreModule 420 BIOS supports the serial console (or console redirection) feature. These I/O
functions are provided by an ANSI-compatible serial terminal, or the equivalent terminal emulation
software running on another system. This can be very useful when setting up the BIOS on a production
line for systems that are not connected to a keyboard and display.
Serial Console BIOS Setup
The serial console (console redirection) feature is implemented by connecting a standard null-modem
cable or a modified serial cable (or “Hot Cable”) between one of the serial ports, such as Serial 1 or 2 (J3
or J9), and the serial terminal or a PC with communications software. The BIOS Setup Utility controls
the serial console settings on the CoreModule 420. Refer to Chapter 4, BIOS Setup for the serial console
option settings and the connection procedure, using the a serial terminal, or PC with communications
software.
Hot (Serial) Cable
To convert a standard serial cable to a Hot Cable, certain pins must be shorted together at the Serial port
connector or at the DB9 connector. Short together the RTS (4) and RI (8) pins on either serial port (J3 or
J9) header. As an alternate, you can short the equivalent pins (pins 7 and 9) on the respective DB9 port
connector as shown in Figure 3-3.
C
M
420H
o
tc
a
b
le
Serial Ports (J3, J9)
(COM1 or COM2)
1
2
3
4
5
6
7
8
9
10
Side View
Or
Standard DB9 Serial
Port Connector (Female)
Rear View
5 4 3 2 1
9 8 7 6
Figure 3-3. Hot Cable Jumper