Interfaces and Connectors
EBX-22 Reference Manual
46
C
ONSOLE
R
EDIRECTION
The EBX-22 can be operated without using the on-board video output by redirecting the console
to a serial communications port. CMOS Setup and some operating systems such as DOS can use
this console for user interaction.
Console redirection settings are configured on the Features tab of CMOS Setup. The default
setting causes the console not to be redirected to COM1 unless a signal (a Ctrl-C character) is
detected from the terminal. Console redirection can also be set to Always or Never. You can
direct console output to any COM port.
Notes on console redirection:
When console redirection is enabled, you can access CMOS Setup by pressing and
holding down Ctrl-C.
The decision to redirect the console is made early in BIOS execution and cannot be
changed later.
The redirected console uses 115200 baud, 8 data bits, 1 stop bit, no parity, and no flow
control.
The default console redirection setting is Auto. The default can be reloaded without
entering BIOS setup by discharging CMOS contents.
Null Modem
The following diagram illustrates a typical DB9 to DB9 RS-232 null modem adapter. Pins 7 and
8 are shorted together on each connector. Unlisted pins have no connection.
System 1 <--> System 2
Name Pin Pin Name
------------------------
TX 3 <--> 2 RX
RX 2 <--> 3 TX
RTS 7 <--> 1 DCD
CTS 8
DSR 6 <--> 4 DTR
DCD 1 <--> 7 RTS
8 CTS
DTR 4 <--> 6 DSR
StockCheck.com
