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6502 Instructions - Introduction

68 bytes added, 01:58, 11 September 2023

→‎Manipulating Flags

The 6502 provides instructions for setting and clearing various condition flags:

CLC ; clear carry flag (C) - required before using ADC(for single-byte and lowest-byte)

CLD ; clear decimal flag (D) - switches into binary math mode

CLI ; clear interrupt disable (I) - enables processor interrupts

CLV ; clear overflow flag (V)

SEC ; set carry flag (C) - required before using SBC(for single-byte and lowest-byte)

SED ; set decimal flag (D) - switches into decimal math mode

SEI ; set interrupt disable - turns off processor interrupts

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