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NT68P61A Datasheet(PDF) 7 Page - List of Unclassifed Manufacturers |
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NT68P61A Datasheet(HTML) 7 Page - List of Unclassifed Manufacturers |
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7 / 48 page  NT68P61A 7 Instruction Set List (continued) Instruction Code Meaning Operation JMP Jump to new location (PC+1) → PCL, (PC+2) → PCH JSR Jump to subroutine PC + 2 ↓, (P+1) → PCL, (PC+2) → PCH LDA Load accumulator with memory M → A LDX Load Index register X with memory M → X LDY Load Index register Y with memory M → Y LSR Shift right one bit 0 → M7 • • • M0 → C NOP No operation No operation (2 cycles) ORA Logical OR A + M → A PHA Push accumulator on stack A ↓ PHP Push status register on stack P ↓ PLA Pull accumulator from stack A ↑ PLP Pull status register from stack P ↑ ROL Rotate left through carry C ← M7 • • • M0 ← C ROR Rotate right through carry C → M7 • • • M0 → C RTI Return from interrupt P ↑, PC ↑ RTS Return from subroutine PC ↑, PC+1 → PC SBC Subtract with borrow A − M − C → A, C SEC Set carry 1 → C SED Set decimal mode 1 → D SEI Set interrupt disable status 1 → J STA Store accumulator in memory A → M STX Store index register X in memory X → M STY Store index register Y in memory Y → M TAX Transfer accumulator to index X A → X TAY Transfer accumulator to index Y A → Y TSX Transfer stack pointer to index X S → X TXA Transfer index X to accumulator X → A TXS Transfer index X to stack Pointer X → S TYA Transfer index Y to accumulator Y → A * Refer to 6502 programming data book for more details. |
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