Panasonic JB-3300 Technical Manual page 221

(5) RS-232C I/O command
Table 5-8
Input
I/O Address
/ HEX © I/O RS-232C I/O Command
*RSCCS-1]DLAB} XAB2} XAB1| XABO
O3FS8 L L L L L O SET TxD BUFFER
(0 2 F 8)
O03 F 8
L L L I AD B E (0 2 F 8) L L RE RxD BUFFER
O03 F 8
L L ET DIVI AT (0 2 F 8) H L L O S DIVISOR LATCH (LSB)
O3F9
L L L L H O SET INTERRUPT ENABLE
(0 2 F 9)
O03 F9
L H L L H O SET DIVISOR LATCH (MSB
(0 2 F 9)
(
)
O3 FA
L x L H L I READ INTERRUPT IDENTIFICATION
(0 2 F A)
FB
0 3 L x L H H O SET LINE CONTROL REG.
(0 2 F B)
O3FC L x H L L O SET MODEM CONTROL REG
(0 2 F C) °
O3FD L x H L H I READ LINE STATUS
(0 2 F D)
OSFE L x H H L I READ MODEM STATUS
(0 2 F E)
.
Note: Either of the I/O addresses 2F8H - 2FFH or 3F8H - 3FFH may be set
by means of a short-circuit plug (J4). When the equipment is shipped,
the I/O address is set to 3F8H - 3FFH.
It - 101