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Routines |
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Clears the panel which is used for the hall of fame and for entering a new high score. The panel is 18 characters wide, 10 characters high and starts at column 04 of row 05. The attributes are set to 00 and the pixels are set to zero.
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Clear the attributes.
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| HallOfFame_Clear | B2D8 | LD HL,$58A4 | Point HL at the first attribute of the panel. | |||||
| B2DB | LD BC,$1810 | BC=1810 (B is the width and C is the number of rows). | ||||||
| B2DE | LD DE,$0020 | DE=0020 (the number of bytes to the next row). | ||||||
| HallOfFame_Clear_Attribute_Rows | B2E1 | PUSH BC | Stash the counters on the stack. | |||||
| B2E2 | PUSH HL | Stash the start of the row on the stack. | ||||||
| HallOfFame_Clear_Attribute_Row | B2E3 | LD (HL),$00 | Clear the attribute. | |||||
| B2E5 | INC L | Move to the next column. | ||||||
| B2E6 | DJNZ HallOfFame_Clear_Attribute_Row | Decrease B by one and loop back to HallOfFame_Clear_Attribute_Row until the row is done. | ||||||
| B2E8 | POP HL | Restore the start of the row from the stack. | ||||||
| B2E9 | ADD HL,DE | Move down to the next row. | ||||||
| B2EA | POP BC | Restore the counters from the stack. | ||||||
| B2EB | DEC C | Decrease the row counter by one and loop back to HallOfFame_Clear_Attribute_Rows until all of the rows are done. | ||||||
| B2EC | JR NZ,HallOfFame_Clear_Attribute_Rows | |||||||
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Clear the pixels.
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| B2EE | LD HL,$40A4 | Point HL at the first pixel line of the panel. | ||||||
| B2F1 | LD BC,$1880 | BC=1880 (B is the width and C is the number of pixel lines). | ||||||
| HallOfFame_Clear_Pixel_Lines | B2F4 | PUSH BC | Stash the counters on the stack. | |||||
| B2F5 | PUSH HL | Stash the start of the pixel line on the stack. | ||||||
| HallOfFame_Clear_Pixel_Line | B2F6 | LD (HL),$00 | Clear a byte of the pixel line. | |||||
| B2F8 | INC L | Move to the next column. | ||||||
| B2F9 | DJNZ HallOfFame_Clear_Pixel_Line | Decrease B by one and loop back to HallOfFame_Clear_Pixel_Line until the line is done. | ||||||
| B2FB | POP HL | Restore the start of the pixel line from the stack. | ||||||
| B2FC | CALL ScreenPosition1PixelBelow | Move down to the next pixel line. | ||||||
| B2FF | POP BC | Restore the counters from the stack. | ||||||
| B300 | DEC C | Decrease the pixel line counter by one and loop back to HallOfFame_Clear_Pixel_Lines until all of the pixel lines are done. | ||||||
| B301 | JR NZ,HallOfFame_Clear_Pixel_Lines | |||||||
| B303 | RET | Return. | ||||||
| Prev: B29F | Up: Map | Next: B304 |
