Sun Oracle Sun Server X4-2 Service Manual page 222

BIOS Advanced Menu Options (Continued)
TABLE:
Setup Options
Parity
Stop Bits
Flow Control
TRUSTED COMPUTING
208 Sun Server X4-2 Service Manual • May 2014
Options
None/
Even/
Odd/
Mark/
Space/
01/02
None/
Hardware RTS/
CTS
Defaults
None
1
None
Description
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 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 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 and stop RTS (request to
send) and CTS (clear to send)
signals.
If you intend to use the Trusted
Platform Module (TPM) feature
set, you must configure the
server to support TPM. The TPM
feature is used by the OS for
proof that the BIOS code has not
been tampered with.