The accumulator is the heart and soul of the 6502 microprocessor. It is the only register that can perform mathematical operations.

In some variants of the 6502, you cannot increment the accumulator using INA. You can however, increment the X and Y using INX and INY.

Related pages

  • ADC - Add memory with accumulator.
  • LDA - load a value into the accumulator.
  • STA
  • X - the X register.
  • Y - the Y register.
Unless otherwise stated, the content of this page is licensed under Creative Commons Attribution 2.5 License.