VersaLogic VL-486-4, Reference Manual

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Register Summary
60 – Register Descriptions VL-486-4 Reference Manual
COM1 S
ERIAL
P
ORT
Table 36: COM1 Serial Port Registers
Mnemonic R/W Address Name
RBRA R 03F8h Receiver Buffer Register A
THRA W 03F8h Transmit Holding Register A
DLLA R/W 03F8h Divisor Latch (LSB) A
IERA R/W 03F9h Interrupt Enable Register A
DLMA R/W 03F9h Divisor Latch (MSB) A
IIRA R 03FAh Interrupt Identification Register A
LCRA R/W 03FBh Line Control Register A
MCRA R/W 03FCh Modem Control Register A
LSRA R 03FDh Line Status Register A
MSRA R 03FEh Modem Status Register A
SCRA R/W 03FFh Scratchpad Register A
COM2 S
ERIAL
P
ORT
Table 37: COM2 Serial Port Registers
Mnemonic R/W Address Name
RBRB R 02F8h Receiver Buffer Register B
THRB W 02F8h Transmit Holding Register B
DLLB R/W 02F8h Divisor Latch (LSB) B
IERB R/W 02F9h Interrupt Enable Register B
DLMB R/W 02F9h Divisor Latch (MSB) B
IIRB R 02FAh Interrupt Identification Register B
LCRB R/W 02FBh Line Control Register B
MCRB R/W 02FCh Modem Control Register B
LSRB R 02FDh Line Status Register B
MSRB R 02FEh Modem Status Register B
SCRB R/W 02FFh Scratchpad Register B