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ix
CONTENTS
11.3.1.4 Transcendental Instructions ..........................................................................11-5
11.3.1.5 Constant Instructions .....................................................................................11-6
11.3.1.6 Processor Control Instructions ......................................................................11-6
11.3.2 80C187 Data Types ................................................................................................11-7
11.4 MICROPROCESSOR AND COPROCESSOR OPERATION...................................... 11-7
11.4.1 Clocking the 80C187 .............................................................................................11-10
11.4.2 Processor Bus Cycles Accessing the 80C187 ......................................................11-10
11.4.3 System Design Tips ..............................................................................................11-11
11.4.4 Exception Trapping ...............................................................................................11-13
11.5 EXAMPLE MATH COPROCESSOR ROUTINES...................................................... 11-13
CHAPTER 12
ONCE MODE
12.1 ENTERING/LEAVING ONCE MODE........................................................................... 12-1
APPENDIX A
80C186 INSTRUCTION SET ADDITIONS AND EXTENSIONS
A.1 80C186 INSTRUCTION SET ADDITIONS................................................................... A-1
A.1.1 Data Transfer Instructions ......................................................................................A-1
A.1.2 String Instructions ...................................................................................................A-2
A.1.3 High-Level Instructions ........................................................................................... A-2
A.2 80C186 INSTRUCTION SET ENHANCEMENTS......................................................... A-8
A.2.1 Data Transfer Instructions ......................................................................................A-8
A.2.2 Arithmetic Instructions ............................................................................................ A-9
A.2.3 Bit Manipulation Instructions ................................................................................... A-9
A.2.3.1 Shift Instructions ............................................................................................. A-9
A.2.3.2 Rotate Instructions ....................................................................................... A-10
APPENDIX B
INPUT SYNCHRONIZATION
B.1 WHY SYNCHRONIZERS ARE REQUIRED................................................................. B-1
B.2 ASYNCHRONOUS PINS.............................................................................................. B-2
APPENDIX C
INSTRUCTION SET DESCRIPTIONS
APPENDIX D
INSTRUCTION SET OPCODES AND CLOCK CYCLES
INDEX