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Routines |
| Prev: DC53 | Up: Map | Next: DCF5 |
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Used by the routine at Dispatch_Handlers.
Animates the 0E-byte records at *ReferenceEnemies.
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Point at the enemy list.
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| Handler_Enemies | DC62 | LD HL,$9070 | Write Graphics_TileFont to *CHARS. | |
| DC65 | LD ($5C36),HL | |||
| DC68 | LD IX,($6432) | Point IX at *ReferenceEnemies. | ||
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Walk each enemy record.
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| Handler_Enemies_Loop | DC6C | LD A,(IX+$00) | Return if the terminator FF is reached. | |
| DC6F | INC A | |||
| DC70 | RET Z | |||
| DC71 | BIT 7,A | Pause and skip this enemy if it is inactive. | ||
| DC73 | CALL NZ,Pause_LeavingRoom | |||
| DC76 | JP NZ,Handler_Enemies_Next | |||
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Skip the walk-frame wrap for high sprite IDs.
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| DC79 | LD A,(IX+$06) | Jump to Handler_Enemies_Probe if the sprite ID is E2 or higher. | ||
| DC7C | CP $E2 | |||
| DC7E | JR NC,Handler_Enemies_Probe | |||
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Advance the walking frame.
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| DC80 | ADD A,$06 | Add 06 to the sprite ID and set the wrap to 24. | ||
| DC82 | LD C,A | |||
| DC83 | LD B,$24 | |||
| Handler_Enemies_WrapLoop | DC85 | SUB B | Subtract 24 until the frame is in range. | |
| DC86 | JR Z,Handler_Enemies_WrapExact | |||
| DC88 | JR C,Handler_Enemies_CommitFrame | |||
| DC8A | JR Handler_Enemies_WrapLoop | |||
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Wrap an exact multiple of 24.
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| Handler_Enemies_WrapExact | DC8C | LD A,C | Subtract one more span of 24. | |
| DC8D | SUB B | |||
| DC8E | LD C,A | |||
| Handler_Enemies_CommitFrame | DC8F | LD (IX+$06),C | Write the wrapped sprite ID. | |
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Only probe when the enemy is cell-aligned.
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| Handler_Enemies_Probe | DC92 | LD A,(IX+$02) | Jump to Handler_Enemies_Update unless the fine-X is 07. | |
| DC95 | CP $07 | |||
| DC97 | JR NZ,Handler_Enemies_Update | |||
| DC99 | BIT 7,(IX+$07) | Jump to Handler_Enemies_ProbeLeft if the enemy is facing left. | ||
| DC9D | JR Z,Handler_Enemies_ProbeLeft | |||
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Probe the cell ahead on the right.
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| DC9F | LD C,(IX+$00) | Set the probe to the top row, one column right. | ||
| DCA2 | LD A,(IX+$01) | |||
| DCA5 | SUB (IX+$05) | |||
| DCA8 | LD B,A | |||
| DCA9 | INC C | |||
| DCAA | CALL JumpTable_SetPrintPosition | Call JumpTable_SetPrintPosition. | ||
| DCAD | LD HL,($6412) | Point HL at that Buffer_RoomTiles tile. | ||
| DCB0 | LD DE,$5DCE | |||
| DCB3 | ADD HL,DE | |||
| DCB4 | LD A,(HL) | Call Reverse_Direction if the tile is solid. | ||
| DCB5 | CP $10 | |||
| DCB7 | CALL NC,Reverse_Direction | |||
| DCBA | JR Handler_Enemies_Update | Jump to Handler_Enemies_Update. | ||
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Probe ahead on the left.
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| Handler_Enemies_ProbeLeft | DCBC | LD A,(IX+$01) | Set the probe row to the top of the enemy. | |
| DCBF | SUB (IX+$05) | |||
| DCC2 | LD B,A | |||
| DCC3 | LD A,(IX+$00) | Jump to Handler_Enemies_Update if the column is 23 or higher. | ||
| DCC6 | CP $23 | |||
| DCC8 | JR NC,Handler_Enemies_Update | |||
| DCCA | SUB (IX+$04) | Set the probe column to the left of the enemy. | ||
| DCCD | LD C,A | |||
| DCCE | CALL JumpTable_SetPrintPosition | Call JumpTable_SetPrintPosition. | ||
| DCD1 | LD HL,($6412) | Point HL at that Buffer_RoomTiles tile. | ||
| DCD4 | LD DE,$5DCE | |||
| DCD7 | ADD HL,DE | |||
| DCD8 | LD A,(HL) | Call Reverse_Direction if the tile is solid. | ||
| DCD9 | CP $10 | |||
| DCDB | CALL NC,Reverse_Direction | |||
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Store, move, draw and erase the enemy.
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| Handler_Enemies_Update | DCDE | CALL JumpTable_AdvanceEntity | Call JumpTable_AdvanceEntity. | |
| DCE1 | CALL JumpTable_StorePosition | Call JumpTable_StorePosition. | ||
| DCE4 | CALL JumpTable_MoveEntity | Call JumpTable_MoveEntity. | ||
| DCE7 | CALL JumpTable_DrawEntity | Call JumpTable_DrawEntity. | ||
| DCEA | CALL JumpTable_EraseEntity | Call JumpTable_EraseEntity. | ||
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Step to the next record.
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| Handler_Enemies_Next | DCED | LD DE,$000E | IX+=000E. | |
| DCF0 | ADD IX,DE | |||
| DCF2 | JP Handler_Enemies_Loop | Jump to Handler_Enemies_Loop. | ||
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View the equivalent code in Booty.
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| Prev: DC53 | Up: Map | Next: DCF5 |