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TABLE OF CONTENTS
FEATURES........................................................................................................................................1
GENERAL DESCRIPTION .................................................................................................................2
PIN CONFIGURATION.......................................................................................................................5
DESCRIPTION OF PIN FUNCTIONS .................................................................................................6
DESCRIPTION OF MULTIFUNCTION PINS.....................................................................................10
FUNCTIONAL DESCRIPTION..........................................................................................................12
SUPER I/O REGISTERS..................................................................................................................12
HOST PROCESSOR INTERFACE....................................................................................................12
FLOPPY DISK CONTROLLER.........................................................................................................13
FDC INTERNAL REGISTERS...........................................................................................................13
COMMAND SET/DESCRIPTIONS....................................................................................................37
INSTRUCTION SET .........................................................................................................................41
SERIAL PORT (UART).....................................................................................................................67
INFRARED INTERFACE ..................................................................................................................81
FAST IR...........................................................................................................................................82
PARALLEL PORT............................................................................................................................84
IBM XT/AT COMPATIBLE, BI-DIRECTIONAL AND EPP MODES ....................................................86
EXTENDED CAPABILITIES PARALLEL PORT.................................................................................93
AUTO POWER MANAGEMENT.....................................................................................................109
SERIAL IRQ...................................................................................................................................114
GP INDEX REGISTERS.................................................................................................................119
WATCH DOG TIMER.....................................................................................................................121
8042 KEYBOARD CONTROLLER DESCRIPTION.........................................................................122
SYSTEM MANAGEMENT INTERRUPT (SMI)................................................................................131
CONFIGURATION .........................................................................................................................132