HP zx2000 Start Here Manual page 30

<n> = Serial line.
the *ONLY* valid line for a serial console.
one UART MUST be selected in the EFI Console-In/Out
tables for a serial console to work.
UART selected in this table.
<s> = Speed.
(9600 is the default if no speed is specified.
115200 is the maximum for HP UARTs)
<p> = Parity. Ex: n (no parity, typical case)
<b> = Bit Encoding. Ex: 7, 8 (8 is the typical case)
For a 115200 baud console, the following syntax is
used:
console=ttyS0,115200n8
• Q. Why doesn't anything happen after I choose a menu
option?
A. If you are using a serial console, reboot and add a parameter
to identify the console to the kernel and configure it properly.
Note: for HP systems, ttyS0 is
Ex: 9600, 19200, 38400, 57600, 115200
30
Exactly
ttyS0 is the