| ← 9635 | Map | 9695 → |
9667: Draw a top/bottom border strip
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Draws a border strip into the tile map and colors its attribute cells.
It stamps no dirty counters, unlike the side wall. The border reaches the screen through the tile-map render once per level.
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| draw_wide_strip | 9667 | PUSH HL | Save the strip's top-left cell twice: for the second tile row and for the attribute pass. | ||||
| 9668 | PUSH HL | ||||||
| 9669 | LD B,$1C | Copy the first row of the border strip tiles into the strip's top row. | |||||
| 966B | LD DE,border_strip_tiles | ||||||
| 966E | CALL copy_bytes | ||||||
| 9671 | POP HL | Restore the top-left cell and drop to the next tile row. | |||||
| 9672 | CALL advance_buffer_row | ||||||
| 9675 | LD B,$1C | Copy the table's second row into the strip's bottom row; the table continues where the first copy left off. | |||||
| 9677 | CALL copy_bytes | ||||||
| 967A | POP HL | Reuse the saved cell offset as an attribute-file address: the tile-map page maps to the attribute-file page of the same cell, low byte unchanged. | |||||
| 967B | LD A,H | ||||||
| 967C | AND $03 | ||||||
| 967E | ADD A,$58 | ||||||
| 9680 | LD H,A | ||||||
| 9681 | PUSH HL | Color the top row. | |||||
| 9682 | LD B,$1C | ||||||
| color_strip_top | 9684 | LD (HL),$45 | Color 28 cells bright cyan ink on black paper. | ||||
| 9686 | INC L | ||||||
| 9687 | DJNZ color_strip_top | ||||||
| 9689 | POP HL | Drop to the bottom attribute row and color it. | |||||
| 968A | CALL advance_buffer_row | ||||||
| 968D | LD B,$1C | ||||||
| color_strip_bottom | 968F | LD (HL),$44 | Color 28 cells bright green ink. | ||||
| 9691 | INC L | ||||||
| 9692 | DJNZ color_strip_bottom | ||||||
| 9694 | RET | ||||||
| ← 9635 | Map | 9695 → |