Specifications

Chapter 3 Hardware
52 Reference Manual ReadyBoard 800
Oops! Jumper (BIOS Recovery)
The Oops! jumper is provided in the event the BIOS settings you’ve selected prevent the system from
booting, but does not reset CMOS or change the Time & Date in the BIOS. Refer to the CMOS
Normal/Clear jumper (JP2) to reset the BIOS and change the Time & Date.
By using the Oops! jumper, you can prevent the current BIOS settings in Flash from being loaded,
forcing the use of the default BIOS settings. Connect the DTR pin to the RI pin on Serial port 1 (COM
1) prior to applying power to prevent the current BIOS settings from loading. After booting with the
Oops! jumper in place, remove the Oops! jumper and go into BIOS Setup Utility. Change the desired
BIOS settings, or select the default settings, and save the changes before rebooting the system.
To convert the Serial 1 interface to an Oops! jumper, short together the DTR (4) and RI (9) pins on the
Serial Port 1 DB9 connector as shown in Figure 3-2.
RB800_Oops!jump
Serial 1 (J15A) Lower Port
Standard DB9 Serial Port Connector
(COM1)
(Female)
Rear View
54
3
21
9876
Figure 3-2. Oops! Jumper Connection
Temperature Monitoring
The Super I/O controller (W83627HF) performs the temperature monitoring function and has inputs
directly from the only thermistor on the board and the thermal diode in the CPU. The thermistor (RT2)
is located between the CPU and Super I/O chip on the underside of the board.
NOTE The ReadyBoard 800 requires a heatsink for all processors, but no fan,
except the 1.8 GHz Pentium CPU.
Remote Access (Serial Console)
The ReadyBoard 800 supports the Remote Access (serial console or console redirection) feature. The
remote access (serial console) can be accessed 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 Setup
The serial console 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 (J15A), and the serial
terminal or a PC with communications software. The BIOS Setup Utility controls the serial console
settings on the ReadyBoard 800. Refer to Chapter 4, BIOS Setup Utility to set the serial console option,
using 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 on the DB9 connector. For example, short the RTS (7) and RI (9) on the respective DB9
port connector as shown in Figure 3-3.
RB800_Hotcable
Standard DB9 Serial
Port Connector (Female)
Rear View
54321
9876
Figure 3-3. Hot Cable Jumper