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Routines |
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Used by the routines at StartLevel and StartLife.
Shows the number of lives which each of the players has, at the top of the screen; the number is followed by the icon for a life. If a player has no lives then their space is blanked. Charlie's last movement (CharlieLastMovement) is also reset to be 02 pixels to the right.
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| DisplayPlayerLives | 7378 | LD HL,$0002 | Write 0002 to CharlieLastMovement (Charlie's last movement). | |||||
| 737B | LD ($5F2B),HL | |||||||
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Controller for 1UP lives.
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| DisplayPlayerLives_1UP | 737E | LD HL,$0040 | Call ScreenAddress with 0040 (the pixel co-ordinates for the 1UP lives) to get the screen address. | |||||
| 7381 | CALL ScreenAddress | |||||||
| 7384 | CALL FetchLives_1UP | Fetch the lives of 1UP using FetchLives_1UP. | ||||||
| 7387 | AND A | If 1UP lives are zero, jump to Handler1UPNoLives. | ||||||
| 7388 | JR Z,Handler1UPNoLives | |||||||
| 738A | CALL HandlerDisplayLives | Else, there are lives to display so call HandlerDisplayLives. | ||||||
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Controller for 2UP lives.
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| Controller2UPLives | 738D | LD HL,$00B0 | Call ScreenAddress with 00B0 (the pixel co-ordinates for the 2UP lives) to get the screen address. | |||||
| 7390 | CALL ScreenAddress | |||||||
| 7393 | CALL FetchLives_2UP | Fetch the lives of 2UP using FetchLives_2UP. | ||||||
| 7396 | AND A | If 2UP lives are zero, jump to Handler2UPNoLives. | ||||||
| 7397 | JR Z,Handler2UPNoLives | |||||||
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Handles displaying the lives count and UDG character.
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| HandlerDisplayLives | 7399 | ADD A,$30 | Add 30 to convert to an ASCII character (starting at "0"). | |||||
| 739B | CALL PrintScreen | Print the digit using PrintScreen. | ||||||
| 739E | LD DE,$73B5 | Point DE at the lives icon (UDG_Life). | ||||||
| 73A1 | PUSH BC | Stash BC and DE on the stack. | ||||||
| 73A2 | PUSH DE | |||||||
| 73A3 | JP PrintCharacter_Draw | Jump to PrintCharacter_Draw to print the icon. | ||||||
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1UP has no lives.
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| Handler1UPNoLives | 73A6 | CALL Handler2UPNoLives | Print two spaces using Handler2UPNoLives. | |||||
| 73A9 | JR Controller2UPLives | Jump to Controller2UPLives. | ||||||
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2UP has no lives.
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| Handler2UPNoLives | 73AB | LD A,$20 | Fetch a space. | |||||
| 73AD | CALL PrintScreen | Print the space using PrintScreen. | ||||||
| 73B0 | LD A,$20 | Fetch a space. | ||||||
| 73B2 | JP PrintScreen | Print a second space using PrintScreen. | ||||||
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View the equivalent code in;
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