Addi-Data ADDICOM PA 7400 Series, Technical Description, Page: 42 / 59

Technical description Chapter 8 PA 7400
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8.2.2 I/O map - serial port 2
Table 8-2: I/O map - Serial port 2
I/O Read I/O Write
Base-S2 +0 RECEIVER HOLDING REGISTER
B
TRANSMIT HOLDING REGISTER B
Base-S2 +1
INTERRUPT ENABLE REGISTER B
Base-S2 +2 INTERRUPT IDENTIFICATION
REGISTER B
Base-S2 +3
LINE CONTROL REGISTER B
Base-S2 +4 MODEM CONTROL REGISTER B RTSB DTRB
Base-S2 +5 LINE STATUS REGISTER B
Base-S2 +6
MODEM STATUS REGISTER B
Base-S2 +7 SCRATCH PAD REGISTER B SCRATCH PAD REGISTER B
8.2.3 I/O map - parallel port
Table 8-3: I/O map - Parallel port
I/O Read I/O Write
Base-P +0 PORT REGISTER PORT REGISTER
Base-P +1 STATUS REGISTER
Base-P +2
CONTROL REGISTER COMMAND REGISTER