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Advanced BIOS Functions
6-28
DL
=
Asynchronous mode byte for
J1.
PD8251
7
6
5
4
3
2
1
o
I
S2 lSI
I
EP
I
PEN
I
L2
I
LI
I
B2
I
B 1
I
baud rate
~----------------~~
~--------------------~~
'*t
baud rate
L...-:..
length of character
0 1 0
1
o
0
1
1
5 bit
6 bit
7 bit
8 bit
parity enable/disable
'--_ _ _ _ _ _ _ _ _ -<{ 1
=
enable
0= disable
parity check
{ 1
=
even
~----------------~
0= odd
length of stop bit
1
1
o
1
1 bit 2 bit
NOTE
Typically, when communication software is
operating, the system timer is off and the key-
board repeat feature does not operate.
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