Routines
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27047: Run Main Loop Body
Used by the routine at Run_Game_Frame.
Processes one frame of the main game loop. Clears all sprite frame IDs, then calls the various game handlers for Percy, hazards and level-specific logic. Resets the lives backup flag and restores the border colour before returning.
Run_Main_Loop_Body 27047 DI Disable interrupts.
27048 PUSH IX Stash IX and IY on the stack.
27050 PUSH IY
Clear the sprite frame IDs for: Sprite01_3Wide_Frame_ID, Sprite02_3Wide_Frame_ID, Sprite03_3Wide_Frame_ID, Sprite04_3Wide_Frame_ID, Sprite05_3Wide_Frame_ID, Sprite06_3Wide_Frame_ID and Sprite07_3Wide_Frame_ID (the eight 3-wide sprites).
27052 LD B,7 Set the sprite counter to 7 in B.
27054 LD HL,56007 Point HL at Sprite01_3Wide_Frame_ID (first 3-wide sprite frame ID).
27057 LD C,0 Set the clear value in C to 0.
Clear_3Wide_Frames_Loop 27059 LD (HL),C Write 0 to the sprite frame ID at *HL.
27060 INC HL Advance HL by four bytes to the next sprite entry.
27061 INC HL
27062 INC HL
27063 INC HL
27064 DJNZ Clear_3Wide_Frames_Loop Decrease the counter and loop back to Clear_3Wide_Frames_Loop until all seven 3-wide sprite frame IDs are cleared.
Clear the sprite frame IDs for: Sprite01_2WideFrame_ID, Sprite02_2WideFrame_ID, Sprite03_2WideFrame_ID, Sprite04_2WideFrame_ID, Sprite05_2WideFrame_ID and Sprite06_2WideFrame_ID (the six 2-wide sprites).
27066 LD HL,56043 Point HL at Sprite01_2WideFrame_ID (first 2-wide sprite frame ID).
27069 LD B,6 Set the sprite counter to 6 in B.
Clear_2Wide_Frames_Loop 27071 LD (HL),C Write 0 to the sprite frame ID at *HL.
27072 INC HL Advance HL by four bytes to the next sprite entry.
27073 INC HL
27074 INC HL
27075 INC HL
27076 DJNZ Clear_2Wide_Frames_Loop Decrease the counter and loop back to Clear_2Wide_Frames_Loop until all six 2-wide sprite frame IDs are cleared.
Call the game handlers.
27078 LD A,(24510) Call ResetRedBird if *Lives_Backup is non-zero.
27081 OR A
27082 CALL NZ,ResetRedBird
27085 CALL Handler_RedBird Call Handler_RedBird.
27088 CALL Handler_Cars Call Handler_Cars.
27091 CALL RoomHandlerDispatch Call RoomHandlerDispatch.
27094 LD A,(24517) Call Handler_Frogs if *CurrentRoom is equal to 4.
27097 CP 4
27099 CALL Z,Handler_Frogs
27102 LD A,(24493) Call UpdateEnergyBar_Refill if *LandedOnPlatformFlag (worm Y adjustment flag) is set.
27105 OR A
27106 CALL NZ,UpdateEnergyBar_Refill
Tidy up at end of frame.
27109 LD A,(24499) Copy *LivesDisplayCharacter to *Lives_Display_Previous.
27112 LD (27843),A
27115 XOR A Write 0 to *Lives_Backup.
27116 LD (24510),A
27119 INC A Set border to BLUE.
27120 OUT (254),A
27122 POP IY Restore IY and IX from the stack.
27124 POP IX
27126 RET Return.
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