6
.
Appendix
PT-955LX / LXF User’s manual
99
COM I/O Address and Register Function
The following table lists the I/O addresses in case of COM 1.
Table 6.4. I/O Address
I/O address DLAB Read/Write
Register
W
Transmitter holding register
THR
0
R
Receive buffer register
RBR
03F8H
1
W
Divisor latch register (LSB)
DLL
1
W
Divisor latch register (MSB)
DLM
03F9H
0
W
Interrupt enable register
IER
03FAH
X
R
Interrupt ID register
IIR
03FBH
X
W
Line control register
LCR
03FCH
X
W
Modem control register
MCR
03FDH
X
R
Line status register
LSR
03FEH
X
R
Modem status register
MSR
03FFH X R/W
Scratch
register
SCR
DLAB (Divisor Latch Access Bit) : The value in bit 7 of the line control register.
Summary of Contents for PT-955LX-DC5000
Page 1: ...IPC Series PANEL PC 955 Series Fanless Atom N270 CF 12 1 model User s Manual CONTEC CO LTD...
Page 7: ...vi PT 955LX LXF User s manual...
Page 19: ...2 System Reference 12 PT 955LX LXF User s manual...
Page 29: ...3 Hardware Setup 22 PT 955LX LXF User s manual...
Page 39: ...4 Each Component Function 32 PT 955LX LXF User s manual...