Routines
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B517: Check And Process Objects
Used by the routine at CheckFlagAndSetDisplay_ProcessPointer.
CheckFlagAndSetDisplay_CheckObjects B517 LD A,($A01C) Check if objects need processing and return if none.
B51A AND A
B51B RET Z
B51C PUSH IY Stash IY, DE and IX on the stack.
B51E PUSH DE
B51F PUSH IX
CheckFlagAndSetDisplay_ObjectLoop B521 CALL $AEA9 Call AEA9 (get next object).
B524 BIT 6,(IY+%00000001) Check bit 6 of object attribute and jump to CheckFlagAndSetDisplay_RestoreAndReturn if object doesn't need special handling.
B528 JR Z,CheckFlagAndSetDisplay_RestoreAndReturn
B52A CALL AdjustObjectTableForSum Call AdjustObjectTableForSum (adjust object table for sum).
CheckFlagAndSetDisplay_ProcessObject B52D PUSH IY Stash IY on the stack and restore into HL.
B52F POP HL
B530 LD DE,$0008 HL+=0008 (move to next object).
B533 ADD HL,DE
B534 CALL ProcessObjectEntry Call ProcessObjectEntry (process object entry).
B537 CP $FF Compare with FF and jump to CheckFlagAndSetDisplay_ObjectLoop if end of objects.
B539 JR Z,CheckFlagAndSetDisplay_ObjectLoop
B53B LD HL,$A034 HL=RoomDisplayParameter and compare with room parameter.
B53E CP (HL)
B53F JR NZ,CheckFlagAndSetDisplay_ProcessObject Jump to CheckFlagAndSetDisplay_ProcessObject if object doesn't match room, otherwise set bit 0.
B541 OR $01
CheckFlagAndSetDisplay_RestoreAndReturn B543 POP IX Restore IX, DE and IY from the stack.
B545 POP DE
B546 POP IY
B548 RET Return.
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