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6. Appendix
Table 6.5.
Function of Each Register < 1 / 4 >
I/O address
03F8H
THR: Transmitter Holding Register [DLAB=0]
D7
bit7
MSB
Register dedicated to write transmitted data to
03F8H
RBR: Reciever Buffer Register [DLAB=O]
D7
bit7
MSB
Register dedicated to read received data from
03F8H
DLL: Divisor Latch (LSB) [DLAB=1]
D7
bit7
MSB
Baud rate setting register (LSB)
03F9H
DLH: Divisor Latch (MSB) [DLAB=1]
D7
bit7
MSB
Baud rate setting register (MSB)
03F9H
IER: Interrupt Enable Register [DLAB=0]
D7
0
94
Description
D6
D5
D4
D3
D2
D6
D5
D4
D3
D2
D6
D5
D4
D3
D2
D6
D5
D4
D3
D2
D6
D5
D4
D3
D2
0
0
0
EMS ELSI
Modem status interrupt enable
[Always used at 0.]
D1
D0
bit0
LSB
D1
D0
bit0
LSB
D1
D0
bit0
LSB
D1
D0
bit0
LSB
D1
D0
ETHREI ERDAI
Received data
Interrupt enable
Received data register empty
Interrupt enable
Receiver line status
Interrupt enable
1: Enable interrupt
0: Disable interrupt
IPC-BX955 User's manual
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