Routines
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7EB2: Update Fixed Entities
Used by the routine at MainLoop.
Called whenever FRAMES has changed. Runs the handlers of the three entities at Player, ticks the clock with ClockTick and records the new value of FRAMES in LastFrame. InHandlers is set while the handlers are running.
UpdateFixedEntities 7EB2 DI Disable interrupts.
7EB3 PUSH IX Stash IX on the stack.
7EB5 LD A,$01 Set the flag in InHandlers that shows the handlers are running.
7EB7 LD ($5E04),A
7EBA LD IX,$EA90 Point IX at the player at Player.
UpdateFixedEntities_Loop 7EBE LD HL,$7EC5 Point HL at the address for the handler to return to at UpdateFixedEntities_Next.
7EC1 PUSH HL Stash the return address on the stack.
7EC2 JP ProcessAction_Dispatch Jump to ProcessAction_Dispatch to run the handler.
UpdateFixedEntities_Next 7EC5 LD DE,$0008 DE=0008 (the size of an entity).
7EC8 ADD IX,DE Move IX on to the next entity.
7ECA PUSH IX Copy IX to HL (using the stack).
7ECC POP HL
7ECD LD DE,$EAA8 Point DE at the end of the fixed entities at ItemEntities.
7ED0 AND A Loop back to UpdateFixedEntities_Loop until all three entities are done.
7ED1 SBC HL,DE
7ED3 JR C,UpdateFixedEntities_Loop
7ED5 CALL ClockTick Call ClockTick to update the clock.
7ED8 LD A,($5C78) Write FRAMES to LastFrame.
7EDB LD ($5E03),A
7EDE XOR A Clear the flag in InHandlers that shows the handlers are running.
7EDF LD ($5E04),A
7EE2 POP IX Restore IX from the stack.
7EE4 EI Enable interrupts.
7EE5 RET Return.
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