4. Jumper Setting
SPC-8450-LVA
27
I/O addresses and instructions
The table below lists I/O addresses for use as SERIAL2.
Table 4.2.
I/O addresses and instructions
I/O address
DLAB
Read/Write
Register
W
Transmitter holding Register
THR
0
R
Receiver buffer Register
RBR
02F8h
1
W
Divisor latch Register (LSB)
DLL
1
W
Divisor latch Register (MSB)
DLM
02F9h
0
W
Interrupt enable Register
IER
02FAh
X
R
Interrupt ID Register
IIR
02FBh
X
W
Line control Register
LCR
02FCh
X
W
Modem Control Register
MCR
02FDh
X
R
Line status Register
LSR
02FEh
X
R
Modem Status Register
MSR
02FFh
X
R/W
Scratch Register
SCR
Содержание SPC-8450-LVA
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