Gunfright: Routine at 52398

52398: Next Sprite Number

Used by the routine at HandleOutlaw.

Moves on to the next of the four walking frames of a figure. They are the lowest two bits of the walking frame.

Input
IX	The address of the figure

Add one to the lowest two bits of the walking frame.

NextSpriteNumber

52398

LD A,(IX+12)

Fetch the walking frame and keep it in C.

52401

LD C,A

52402

INC A

Add one.

52403

AND %00000011

Keep the lowest two bits.

52405

LD B,A

Keep them in B.

Put them back in the walking frame.

52406

LD A,C

Fetch the walking frame again.

52407

AND %11111100

Clear the lowest two bits.

52409

OR B

Put in the new frame.

52410

LD (IX+12),A

Set the walking frame and return.

52413

RET

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