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Block Move Addressing: Difference between revisions

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=== References ===
=== References ===
* [[Eyes & Lichty]], page 388: https://archive.org/details/0893037893ProgrammingThe65816/page/n414
* [[Eyes & Lichty]], page 388: https://archive.org/details/0893037893ProgrammingThe65816/page/388
* "Block Moves" on page 103, lbid: https://archive.org/details/0893037893ProgrammingThe65816/page/103
* "Block Moves" on page 103, lbid: https://archive.org/details/0893037893ProgrammingThe65816/page/103
* section 3.5.9 of 65c816 datasheet, https://westerndesigncenter.com/wdc/documentation/w65c816s.pdf
* section 3.5.9 of 65c816 datasheet, https://westerndesigncenter.com/wdc/documentation/w65c816s.pdf

Revision as of 02:07, 14 July 2024

Two instructions use Block Move Addressing on the 65c816:

  • MVP (opcode 44)
  • MVN (opcode 54)

The total number of bytes copied is the value in the C accumulator plus one. If a block move is interrupted, the current byte copy is completed, then the interrupt is serviced.

Syntax

Asar:

MVN srds

References