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Routines |
| Prev: D2B2 | Up: Map | Next: D372 |
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Used by the routine at DrawWallStrips.
Sets the attributes of a column of AttributeBuffer from the strip to the bottom of the view. The colour is bright green, cyan, yellow or white, from the lowest two bits of WallTile.
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Return unless the strip is in the view.
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| ColourWallColumn | D356 | LD A,D | Return if it is below the bottom of the view. | |||||||
| D357 | SUB $BF | |||||||||
| D359 | RET NC | |||||||||
| D35A | NEG | Make the number of pixel rows to the bottom. | ||||||||
| D35C | SRL A | Divide it by eight. | ||||||||
| D35E | SRL A | |||||||||
| D360 | SRL A | |||||||||
| D362 | RET Z | Return if there are none. | ||||||||
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Colour the column.
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| D363 | LD B,A | Set the number of character rows. | ||||||||
| D364 | EX DE,HL | Put the position in HL. | ||||||||
| D365 | CALL CalculateAttributeAddress | Call CalculateAttributeAddress. | ||||||||
| D368 | LD A,($BBC0) | Fetch WallTile. | ||||||||
| D36B | AND %00000011 | Keep the lowest two bits. | ||||||||
| D36D | OR %01000100 | Make the colour bright green, cyan, yellow or white. | ||||||||
| D36F | JP ColourAttributeColumn | Jump to ColourAttributeColumn. | ||||||||
| Prev: D2B2 | Up: Map | Next: D372 |