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Routines |
| Prev: F8CF | Up: Map | Next: F981 |
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Used by the routine at GameEntryPoint.
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This routine builds the game selection screen.
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| SelectionScreen | F916 | XOR A | Set border colour to BLACK. | |
| F917 | OUT ($FE),A | |||
| F919 | CALL UpdateXXXXXBuffer | Call UpdateXXXXXBuffer. | ||
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The admin screens show the right-hand side of level 2.
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| F91C | LD A,$02 | A=level 02. | ||
| F91E | CALL FindScene | Call FindScene. | ||
| F921 | CALL WriteSceneToShadowBuffer | Call WriteSceneToShadowBuffer. | ||
| F924 | CALL CreateAdminPageTemplate | Call CreateAdminPageTemplate. | ||
| F927 | CALL Print_SelectionScreen | Call Print_SelectionScreen. | ||
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The selection page displays for a period of time, and then the game cycles through playareas.
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| F92A | LD B,$FF | B=FF (counter). | ||
| SelectionScreen_0 | F92C | HALT | Halt operation (suspend CPU until the next interrupt). | |
| F92D | PUSH BC | Stash BC on the stack. | ||
| F92E | CALL ChooseControlType | Call ChooseControlType. | ||
| F931 | POP BC | Restore BC from the stack. | ||
| F932 | JR NZ,SelectionScreen_1 | Jump to SelectionScreen_1 if {} is not zero. | ||
| F934 | LD A,D | Jump to SelectionScreen_1 if D is equal to FF. | ||
| F935 | CP $FF | |||
| F937 | JR Z,SelectionScreen_1 | |||
| F939 | CP $1E | Return if A is equal to 1E. | ||
| F93B | RET Z | |||
| F93C | CP $0F | Jump to SelectionScreen_0 if A is not equal to 0F. | ||
| F93E | JR NZ,SelectionScreen_0 | |||
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Removes the print termination bit from the entire table at Table_ASCII.
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| F940 | LD HL,$FBF2 | HL=Table_ASCII. | ||
| F943 | LD B,$28 | B=28 (length). | ||
| StripPrintTerminationBit_Loop | F945 | LD A,(HL) | A=*HL. | |
| F946 | AND %01111111 | Keep only bits 0-6. | ||
| F948 | LD (HL),A | Write A to *HL. | ||
| F949 | INC HL | Increment HL by one. | ||
| F94A | DJNZ StripPrintTerminationBit_Loop | Decrease counter by one and loop back to StripPrintTerminationBit_Loop until counter is zero. | ||
| F94C | CALL CreateAdminPageTemplate | Call CreateAdminPageTemplate. | ||
| F94F | CALL ChangeControls | Call ChangeControls. | ||
| F952 | JR SelectionScreen | Jump to SelectionScreen. | ||
| SelectionScreen_1 | F954 | DJNZ SelectionScreen_0 | Decrease counter by one and loop back to SelectionScreen_0 until counter is zero. | |
| F956 | CALL PressAnyKey_Pause | Call PressAnyKey_Pause. | ||
| F959 | JR NZ,SelectionScreen | Jump to SelectionScreen if {} is not zero. | ||
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This loops over some level playareas until a key is pressed or we reach level 0B.
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| F95B | LD B,$01 | B=level 01. | ||
| DisplayLevels_Loop | F95D | PUSH BC | Stash the current level on the stack twice. | |
| F95E | PUSH BC | |||
| F95F | CALL UpdateXXXXXBuffer | Call UpdateXXXXXBuffer. | ||
| F962 | POP BC | Restore current level from the stack. | ||
| F963 | LD A,B | A=current level to display. | ||
| F964 | CALL FindScene | Call FindScene. | ||
| F967 | CALL WriteSceneToShadowBuffer | Call WriteSceneToShadowBuffer. | ||
| F96A | CALL Scene_DisplayCarpet | Call Scene_DisplayCarpet. | ||
| F96D | CALL ScreenBuffer_Update | Call ScreenBuffer_Update. | ||
| F970 | CALL AttributeBuffer_Update | Call AttributeBuffer_Update. | ||
| F973 | CALL PressAnyKey_Pause | Call PressAnyKey_Pause. | ||
| F976 | POP BC | Restore current level from the stack. | ||
| F977 | JR NZ,SelectionScreen | Jump to SelectionScreen if any key has been pressed. | ||
| F979 | INC B | Increment current level by one. | ||
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Only display levels 00-0A.
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| F97A | LD A,B | Loop back to DisplayLevels_Loop until B is equal to 0B. | ||
| F97B | CP $0B | |||
| F97D | JR NZ,DisplayLevels_Loop | |||
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Display the selection screen options.
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| F97F | JR SelectionScreen | Jump to SelectionScreen. | ||
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