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MVP

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Revision as of 03:26, 18 June 2023 by Xetheria (talk | contribs) (added parameter descriptions)
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MVP (Block Move Positive) is a 65c816 instruction that copies a contiguous block of memory. It is intended to copy a block from a lower address to a higher address (moving it in the positive direction).

In Eyes & Lichty, the "P" in the mnemonic stands for "Previous" not "Positive."

mvp.png
Basic Info
Addressing Mode Opcode Length Speed
block move 44 3 bytes 7 cycles per byte moved
Flags Clobbered
N V M X D I Z C
. . . . . . . .

Parameters

  • the X index register specifies the ending (highest) source address of the block
  • the Y index register specifies the ending (highest) destination address of the block
  • the C double accumulator specifies the length of the block in bytes minus one
  • the first operand byte specifies the destination bank the block will be in
  • the second operand byte specifies the source bank the block starts out in

See Also

External Links