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Routines |
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This routine "swaps" the data between DE and HL.
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| ChangePlayer | 45621 | LD A,(38558) | A=Flag_ActivePlayer. | |
| 45624 | CPL | Flip the bits. | ||
| 45625 | LD (38558),A | Write this back to Flag_ActivePlayer. | ||
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These are all the player states.
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| 45628 | LD HL,38588 | HL=38588 | ||
| 45631 | LD DE,38623 | DE=38623. | ||
| 45634 | LD BC,35 | BC=35 (counter). | ||
| 45637 | CALL ChangePlayer_Loop | Call ChangePlayer_Loop. | ||
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This is the current "map".
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| 45640 | LD HL,56812 | HL=56812. | ||
| 45643 | LD DE,57324 | DE=57324. | ||
| 45646 | LD BC,512 | BC=512 (counter). | ||
| 45649 | CALL ChangePlayer_Loop | Call ChangePlayer_Loop. | ||
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And this is the active sprites.
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| 45652 | LD HL,38658 | HL=ImmortalData. | ||
| 45655 | LD DE,38958 | DE=38958. | ||
| 45658 | LD BC,300 | BC=300 (counter). | ||
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This looks complicated but it's just grabbing the data from DE, grabbing the data from HL, and writing the others data to each one.
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| ChangePlayer_Loop | 45661 | LD A,(DE) | Fetch a byte from DE and store it in A. | |
| 45662 | EX AF,AF' | Switch to the shadow AF register. | ||
| 45663 | LD A,(HL) | Copy a byte from HL and write it to DE. | ||
| 45664 | LD (DE),A | |||
| 45665 | EX AF,AF' | Switch back to the normal AF register. | ||
| 45666 | LD (HL),A | Write the byte held in A (orginally from DE) into HL. | ||
| 45667 | INC DE | Increment DE by one. | ||
| 45668 | INC HL | Increment HL by one. | ||
| 45669 | DEC BC | Decrease C by one. | ||
| 45670 | LD A,B | Loop back to ChangePlayer_Loop until the counter in BC is zero. | ||
| 45671 | OR C | |||
| 45672 | JR NZ,ChangePlayer_Loop | |||
| 45674 | RET | Return. | ||
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View the equivalent code in;
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