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Routines |
| Prev: 687B | Up: Map | Next: 6900 |
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Builds the game screen from scratch. The screen and attribute buffers are cleared, then the sidebar, the map, the cup count, the lives, the score headings and the border of the play area are drawn.
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| CreateWindow | 68A0 | LD HL,$5E68 | Point HL at the radar blip records (RadarBlips). | |||||
| 68A3 | LD BC,$0C00 | BC=0C00 (B is the counter for the 0C bytes and C is 00). | ||||||
| CreateWindow_ClearBlips | 68A6 | LD (HL),C | Clear a byte of the radar blip records. | |||||
| 68A7 | INC HL | Increment HL by one. | ||||||
| 68A8 | DJNZ CreateWindow_ClearBlips | Decrease the byte counter by one and loop back to CreateWindow_ClearBlips until all 0C bytes have been cleared. | ||||||
| 68AA | LD HL,$FFFF | Write FFFF to PlayerWorldPosition (so the terrain dots are drawn afresh). | ||||||
| 68AD | LD ($5E34),HL | |||||||
| 68B0 | LD HL,$65FD | Point HL at the first terrain dot (TerrainDots). | ||||||
| 68B3 | LD B,$10 | Set the dot counter to 10. | ||||||
| CreateWindow_Terrain | 68B5 | RES 0,(HL) | Reset bit 0 of the byte HL is pointing to (the dot is not drawn). | |||||
| 68B7 | INC HL | Move on to the next terrain dot. | ||||||
| 68B8 | INC HL | |||||||
| 68B9 | DJNZ CreateWindow_Terrain | Decrease the dot counter by one and loop back to CreateWindow_Terrain until all 10 dots are marked as not drawn. | ||||||
| 68BB | CALL ResetAttributes | Call ResetAttributes to reset the attribute buffer. | ||||||
| 68BE | CALL DrawHUDPanel | Call DrawHUDPanel to draw the sidebar. | ||||||
| 68C1 | CALL PlotMapPoints | Call PlotMapPoints to plot the map points. | ||||||
| 68C4 | CALL DisplayCupsCollected | Call DisplayCupsCollected to display the cups collected. | ||||||
| 68C7 | CALL DisplayPlayerLives | Call DisplayPlayerLives to display the lives. | ||||||
| 68CA | CALL DisplayMiles | Call DisplayMiles to display the miles and time. | ||||||
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Draw the border of the play area, by setting a row of attributes along the top and bottom and a column along each side.
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| 68CD | LD HL,$5808 | HL=5808 (the attribute address of the top left). | ||||||
| 68D0 | LD BC,$1801 | BC=1801 (18 across and 01 down). | ||||||
| 68D3 | PUSH BC | Stash BC on the stack. | ||||||
| 68D4 | CALL AttributesPlayArea | Set the attributes of the top row using AttributesPlayArea. | ||||||
| 68D7 | LD HL,$5AE8 | HL=5AE8 (the attribute address of the bottom left). | ||||||
| 68DA | POP BC | Restore BC from the stack. | ||||||
| 68DB | CALL AttributesPlayArea | Set the attributes of the bottom row using AttributesPlayArea. | ||||||
| 68DE | LD HL,$5828 | HL=5828 (the attribute address of the left side). | ||||||
| 68E1 | LD BC,$0116 | BC=0116 (01 across and 16 down). | ||||||
| 68E4 | PUSH BC | Stash BC on the stack. | ||||||
| 68E5 | CALL AttributesPlayArea | Stash the size of the side on the stack. | ||||||
| 68E8 | POP BC | Restore BC from the stack. | ||||||
| 68E9 | LD HL,$583F | HL=583F (the attribute address of the right side). | ||||||
| 68EC | CALL AttributesPlayArea | Set the attributes of the right side using AttributesPlayArea. | ||||||
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Print the "SCORE" and "HI-SCORE" headings and the scores.
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| 68EF | LD HL,$0050 | HL=0050 (pixel co-ordinates: H is the Y position and L is the X position). | ||||||
| 68F2 | LD DE,$6031 | Point DE at the "SCORE" and "HI-SCORE" headings (Text_ScoreHi). | ||||||
| 68F5 | CALL PrintStringColour | Print the headings using PrintStringColour. | ||||||
| 68F8 | CALL Score_1UP | Call Score_1UP to print the score. | ||||||
| 68FB | CALL Score_HI | Call Score_HI to print the high score. | ||||||
| 68FE | JR DisplayNightDriver | Jump to DisplayNightDriver. | ||||||
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| Prev: 687B | Up: Map | Next: 6900 |
