TABLE OF CONTENTS
FEATURES ...................................................................................................................................... 1
GENERAL DESCRIPTION................................................................................................................ 3
PIN CONFIGURATION...................................................................................................................... 4
DESCRIPTION OF PIN FUNCTIONS ................................................................................................ 5
FUNCTIONAL DESCRIPTION........................................................................................................ 14
SUPER I/O REGISTERS.............................................................................................................14
HOST PROCESSOR INTERFACE .............................................................................................14
FLOPPY DISK CONTROLLER................................................................................................... 15
FLOPPY DISK CONTROLLER INTERNAL REGISTERS .............................................................15
COMMAND SET/DESCRIPTIONS.................................................................................................. 39
INSTRUCTION SET ........................................................................................................................ 43
SERIAL PORT (UART).................................................................................................................... 69
INFRARED INTERFACE...................................................................................................................84
FAST IR .......................................................................................................................................... 85
PARALLEL PORT........................................................................................................................... 87
IBM XT/AT COMPATIBLE, BI-DIRECTIONAL AND EPP MODES................................................89
EXTENDED CAPABILITIES PARALLEL PORT............................................................................95
AUTO POWER MANAGEMENT .....................................................................................................111
INTEGRATED DRIVE ELECTRONICS INTERFACE ..................................................................... 116
HOST FILE REGISTERS ..........................................................................................................116
TASK FILE REGISTERS...........................................................................................................116
IDE OUTPUT ENABLES ...........................................................................................................117
BIOS BUFFER..........................................................................................................................117
GENERAL PURPOSE I/O FUNCTIONAL DESCRIPTION ...............................................................120
8042 KEYBOARD CONTROLLER AND REAL TIME CLOCK FUNCTIONAL DESCRIPTION...........134
SOFT POWER MANAGEMENT..................................................................................................... 159
SYSTEM MANAGEMENT INTERRUPT (SMI)................................................................................ 162
ACCESS.BUS ............................................................................................................................... 163
CONFIGURATION......................................................................................................................... 169
OPERATIONAL DESCRIPTION..................................................................................................... 216
MAXIMUM GUARANTEED RATINGS....................................................................................... 216
DC ELECTRICAL CHARACTERISTICS.................................................................................... 216
TIMING DIAGRAMS...................................................................................................................... 221
ECP PARALLEL PORT TIMING..................................................................................................... 247
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