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Routines |
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The handler of SetGraphicAttributes for a graphic that is flipped from top to bottom. This is the same as SetAttributes_Upright, except that it starts from the last row and works back up with SubtractWidthFromAddress.
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| SetAttributes_Flipped | 40398 | POP BC | Restore the attribute and graphic ID from the stack. | |
| 40399 | CALL GetGraphicAttributeDetails | Call GetGraphicAttributeDetails to get the details of the attributes. | ||
| 40402 | CALL FindLastRow | Call FindLastRow to move on to the last row. | ||
| SetAttributes_Flipped_Row | 40405 | PUSH BC | Stash the width and height on the stack. | |
| 40406 | PUSH DE | Stash the position in the attributes on the stack. | ||
| 40407 | PUSH HL | Stash the attribute buffer address on the stack. | ||
| SetAttributes_Flipped_Cell | 40408 | LD A,(DE) | Fetch the next attribute. | |
| 40409 | INC DE | Move DE on to the next byte. | ||
| 40410 | AND A | Jump to SetAttributes_Flipped_Next if it is 0. | ||
| 40411 | JR Z,SetAttributes_Flipped_Next | |||
| 40413 | CP 255 | Jump to SetAttributes_Flipped_Write if it is not 255. | ||
| 40415 | JR NZ,SetAttributes_Flipped_Write | |||
| 40417 | LD A,(24090) | Fetch the room attribute from CurrentRoom_Attribute. | ||
| SetAttributes_Flipped_Write | 40420 | LD (HL),A | Write A to the attribute buffer. | |
| SetAttributes_Flipped_Next | 40421 | INC L | Move HL on to the next cell. | |
| 40422 | DJNZ SetAttributes_Flipped_Cell | Decrease the width by one and loop back to SetAttributes_Flipped_Cell until all of the cells in the row have been set. | ||
| 40424 | POP HL | Restore the attribute buffer address from the stack. | ||
| 40425 | LD BC,32 | BC=0032 (the size of a row of the attribute buffer). | ||
| 40428 | AND A | Move up a row. | ||
| 40429 | SBC HL,BC | |||
| 40431 | POP DE | Restore the position in the attributes from the stack. | ||
| 40432 | POP BC | Restore the width and height from the stack. | ||
| 40433 | CALL SubtractWidthFromAddress | Call SubtractWidthFromAddress to move back to the previous row of the attributes. | ||
| 40436 | DEC C | Decrease the height by one and loop back to SetAttributes_Flipped_Row until all of the rows have been set. | ||
| 40437 | JR NZ,SetAttributes_Flipped_Row | |||
| 40439 | RET | Return. | ||
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