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NSC800N Datasheet(PDF) 28 Page - National Semiconductor (TI) |
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NSC800N Datasheet(HTML) 28 Page - National Semiconductor (TI) |
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28 / 76 page  120 Instruction Set This section details the entire NSC800 instruction set in terms of Opcode Instruction Function Timing Addressing Mode The instructions are grouped in order under the following functional headings 8-Bit Loads 16-Bit Loads 8-Bit Arithmetic 16-Bit Arithmetic Bit Set Reset and Test Rotate and Shift Exchanges Memory Block Moves and Searches InputOutput CPU Control Program Control 121 Instruction Set Index Alphabetical Assembly Operation Page Mnemonic ADC Am1 Add with carry memory location contents to Accumulator 40 ADC An Add with carry immediate data n to Accumulator 38 ADC Ar Add with carry register r contents to Accumulator 36 ADC HLpp Add with carry register pair pp to HL 43 ADD Am1 Add memory location contents to Accumulator 40 ADD An Add immediate data n to Accumulator 38 ADD Ar Add register r contents to Accumulator 36 ADD HLpp Add register pair pp to HL 43 ADD IXpp Add register pair pp to IX 43 ADD IYpp Add register pair pp to IY 43 ADD sspp Add register pair pp to contents of register pair ss 43 AND m1 Logical ‘AND’ memory contents to Accumulator 41 AND n Logical ‘AND’ immediate data to Accumulator 39 AND r Logical ‘AND’ register r contents to Accumulator 36 BIT bm1 Test bit b of location m1 45 BIT br Test bit b of register r 44 CALL ccnn Call subroutine at location nn if condition cc is true 56 CALL nn Unconditional call to subroutine at location nn 56 CCF Complement carry flag 38 CP m1 Compare memory contents with Accumulator 42 CP n Compare immediate data n with Accumulator 40 CP r Compare register r to contents with Accumulator 37 CPD Compare location (HL) and Accumulator decrement HL and BC 50 CPDR Compare location (HL) and Accumulator decrement HL and BC 51 repeat until BC e 0 CPI Compare location (HL) and Accumulator increment HL decrement BC 50 CPIR Compare location (HL) and Accumulator increment HL decrement BC 51 repeat until BC e 0 CPL Complement Accumulator (1’s complement) 37 DAA Decimal adjust Accumulator 38 DEC m1 Decrement data in memory location m1 42 DEC r Decrement register r contents 37 DEC rr Decrement register pair rr contents 44 28 |
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