Cyberun: Routine at D711

D711: Finish Step

Used by the routines at DrawSlopeRows, DrawSlopeRowsFromEdge, DrawMirroredRowsFromEdge, DrawMirroredSlopeRows, DrawOneByteRows, DrawThreeByteRows, DrawTwoByteRows, DrawMirroredThreeByteRows, DrawMirroredTwoByteRows and DrawMirroredOneByteRows.

Finishes the drawing of a step. The screen address that the drawing has reached is stored in SegmentScreenAddress (at FinishStep only), the number of steps drawn is counted and the next step of the segment is started, until the segment has no steps left.

Input
HL	Screen address

FinishStep

D711

LD ($CE49),HL

Update the segment screen address.

This entry point is used by the routine at DrawFlatRows.

FinishStep_Exchange

D714

EXX

Switch to the alternate registers.

D715

INC D

Advance D.

This entry point is used by the routines at NoteWallContact and SetUpFlatPiece.

FinishStep_Count

D716

LD A,($5C2F)

The flagged steps.

D719

INC A

Advance A.

D71A

LD ($5C2F),A

Update the flagged steps.

D71D

LD A,($CE54)

The steps already drawn.

D720

INC A

Advance A.

D721

LD ($CE54),A

Update the steps already drawn.

This entry point is used by the routines at CountVerticalContact, FlagLeftContact, FlagRightContact, NextStep and SetUpFlatPiece.

FinishStep_Next

D724

INC HL

Advance HL.

D725

DEC C

Step C back.

D726

JP NZ,NextStep

Jump to NextStep if the zero flag is clear.

Continue on to EndSegment.