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Direct Page Indirect Long Addressing

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Direct Page Indirect Long Addressing is supported by eight instructions:

  • ADC (opcode 67)
  • AND (opcode 27)
  • CMP (opcode C7)
  • EOR (opcode 47)
  • LDA (opcode A7)
  • ORA (opcode 07)
  • SBC (opcode E7)
  • STA (opcode 87)

The 24-bit indirect address is located in bank zero by summing the direct register and the byte following the opcode. This 24-bit indirect address becomes the effective address:

  • The byte number is located at the sum
  • The page number is located at the sum plus one
  • The bank number is located at the sum plus two

Syntax

LDA [dp]

See Also

References

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