Address	DLAB	Function	0	1	2	3	4	5	6	7
0	0	Reciever Buffer Register (Read Only) Transmitter Holding Register (Write Only)	Data0	Data1	Data2	Data3	Data4	Data5	Data6	Data7
	1	Divisor Latch (LSB)	Bit0	Bit1	Bit2	Bit3	Bit4	Bit5	Bit6	Bit7
1	0	Interrupt Enable Register	Enable Recieved Data Available Interrupt	Enable Transmitter Holding Register Empty Interrupt	Enable Reciever Line Status Interupt	Enable Modem Status Interrupt	0	0	0	0
	1	Divisor Latch (MSB)	Bit0	Bit1	Bit2	Bit3	Bit4	Bit5	Bit6	Bit7
2		Interrupt ID Register	"0" if Int. Pending	Interrupt ID Bit (0)	Interrupt ID Bit (1)	0	0	0	0	0
3		Line Control Register	Word Length Select Bit 0	Word Length Select Bit 1	Number of STOP Bits	Parity Enable	Even Parity Select	Stick Parity	Set Break	Divisor Latch Access Bit DLAB
4		MODEM Control Register	Data Terminal Ready (DTR)	Request to Send (RTS)	Out 1	Out 2	Loop	0	0	0
5		Line Status Register	Data Ready (DR)	Overrun Error (OR)	Parity Error (PE)	Framing Error (FE)	Break Interrupt (BI)	Transmitter Holding Register Empty	Transmitter Shift Register Empty	0
6		MODEM Status Register	Delta Clear to Send (DCTS)	Delta Data Set Ready (DDSR)	Trailing Edge Ring Ind.	Delta Recieve Line Signal Detect	Clear To Send (CTS)	Data Set Ready (DSR)	Ring Ind. (RI)	Recieved Line Signal Detect

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