Commodore VIC-20 Programmer's Reference Manual page 270

PARITY OPTIONS
BIT
7
-
0
0
1
1
BIT
6
-
0
1
0
1
BIT
5
0
1
1
1
1
OPERATIONS
PARITY DISABLED, NONE
GENERATED/RECEIVED
ODD PARITY
RECEIVER/TRANSMITTER
EVEN PARITY
RECEIVER/TRANSMITTER
MARK TRANSMITTED
PARITY CHECK DISABLED
SPACE TRANSMITTED
PARITY CHECK DISABLED
DUPLEX
0-FULL DUPLEX
1-HALF DUPLEX
UNUSED
UNUSED
UNUSED
I
^HANDSHAKE
0-3 LINE
1-X LINE
Figure 4-2. Command register.
KERNAL ENTRIES
CHKIN (SFFC6)—See Section 3 for more information on entry
and exit conditions.
GETIN (SFFE4)—See Section 3 for more intormation on entry
and exit conditions.
CHRIN (SFFCF)—See Section 3 for more information on entry
and exit conditions.
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