BIOS Advanced Menu Serial Port Console Redirection Options

The following table describes the BIOS Advanced Menu serial port console redirection options.

Setup Options Options Defaults Description

EMS Console Redirection

Disabled/Enabled

Disabled

Use this option to enable or disable console redirection for Windows Emergency Management Service (EMS) administration.

Console Redirection

Disabled/Enabled

Enabled

Use this option to enable or disable console redirection.

Terminal Type

VT100/VT100+/VT-UTF8/ANSI

VT100+

Select the emulation for the terminal:

  • VT100: ASCII character set.

  • VT100+: Extends VT100 to support color, function keys, etc.

  • VT-UTF8: Uses UTF8 encoding to map Unicode characters onto one or more bytes.

  • ANSI: Extended ASCII character set.

Bits per Second

9600

19200

38400

57600

115200

9600

Select the serial port transmission speed. The speed must be matched on the connecting serial device. Long or noisy lines require lower speeds.

Data Bits

7/8

8

Select the data bits.

Parity

None/Even/Odd/Mark/Space

None

A parity bit can be sent with the data bits to detect some transmission errors.

  • None: No parity bits are sent.

  • Even: Parity bit is 0 if the number of 1s in the data bits is even.

  • Odd: Parity bit is 0 if the number of 1s in the data bits is odd.

  • Mark: Parity bit is always 1.

  • Space: Parity bit is always 0.

Mark and Space parity do not allow for error detection. They can be used as an additional data bit.

Stop Bits

1/2

1

Stop bits indicate the end of a serial data packet. (A start bit indicates the beginning of a serial data packet.) The standard setting is 1 stop bit. Communication with slow devices may require more than 1 stop bit.

Flow Control

None, Hardware RTS/CTS, Software Xon/Xoff

None

Flow control can prevent data loss from buffer overflow. When sending data, if the receiving buffers are full, a 'stop' signal can be sent to stop the data flow. Once the buffers are empty, a 'start' signal can be sent to restart the flow. Hardware flow control uses two wires to send start/stop signals.