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Routines |
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Used by the routine at PopulateRoomBuffer.
Command 02: draw the same tile repeatedly. The following two bytes specify the repeat count and the tile ID to draw.
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| Command02_RepeatedTile | 5EAA | INC HL | Increment the room data pointer by one. | |||||||
| 5EAB | LD A,(HL) | Fetch the repeat count from *HL and store it in B. | ||||||||
| 5EAC | LD B,A | |||||||||
| 5EAD | INC HL | Increment the room data pointer by one. | ||||||||
| 5EAE | LD A,(HL) | Fetch the tile ID from *HL. | ||||||||
| 5EAF | INC HL | Increment the room data pointer past the command bytes. | ||||||||
| RepeatedTile_Loop | 5EB0 | PUSH AF | Stash the tile ID, repeat counter, tile counter and room data pointer on the stack. | |||||||
| 5EB1 | PUSH BC | |||||||||
| 5EB2 | PUSH DE | |||||||||
| 5EB3 | PUSH HL | |||||||||
| 5EB4 | LD D,$00 | D=00 (flag: draw tile to room buffer). | ||||||||
| 5EB6 | CALL Draw_Room_Tile | Call Draw_Room_Tile. | ||||||||
| 5EB9 | POP HL | Restore the room data pointer, tile counter, repeat counter and tile ID from the stack. | ||||||||
| 5EBA | POP DE | |||||||||
| 5EBB | POP BC | |||||||||
| 5EBC | POP AF | |||||||||
| 5EBD | EX AF,AF' | Switch to shadow AF to preserve the tile ID. | ||||||||
| 5EBE | DEC DE | Decrease the tile counter by one. | ||||||||
| 5EBF | LD A,E | Jump back to PopulateRoomBuffer_Error if the tile counter is zero. | ||||||||
| 5EC0 | OR D | |||||||||
| 5EC1 | JR Z,PopulateRoomBuffer_Error | |||||||||
| 5EC3 | EX AF,AF' | Switch back to main AF to retrieve the tile ID. | ||||||||
| 5EC4 | DJNZ RepeatedTile_Loop | Decrease the repeat counter by one and loop back to RepeatedTile_Loop until all tiles are drawn. | ||||||||
| 5EC6 | JR PopulateRoomBuffer_ParseByte | Jump to PopulateRoomBuffer_ParseByte to continue parsing. | ||||||||
| Prev: 5E92 | Up: Map | Next: 5EC8 |