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Routines |
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Used by the routine at StartGame.
Chooses which of the eight sets of rooms in KeyPieceRooms will hold the three entities for the A.C.G. key at Initialisation_Key_ACG, using FRAMES and CounterLow, and writes the three rooms to them.
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| PlaceKeyPieces | 38070 | LD A,(23672) | Fetch FRAMES and keep FRAMES in C. | |
| 38073 | LD C,A | |||
| 38074 | LD A,(24082) | Fetch the counter from CounterLow. | ||
| 38077 | ADD A,C | Add FRAMES to the counter. | ||
| 38078 | AND %00000111 | Keep only bits 0-2. | ||
| 38080 | LD C,A | Keep the number of the set in C. | ||
| 38081 | ADD A,A | Multiply the number of the set by 3. | ||
| 38082 | ADD A,C | |||
| 38083 | LD L,A | Keep the offset of the set in L. | ||
| 38084 | LD H,0 | Clear the high byte of the offset. | ||
| 38086 | LD BC,38109 | Point BC at the key piece rooms at KeyPieceRooms. | ||
| 38089 | ADD HL,BC | Add the offset to the table, to find the chosen set. | ||
| 38090 | EX DE,HL | Keep the set of rooms in DE. | ||
| 38091 | LD HL,24614 | Point HL at the room of the first entity at Initialisation_Key_ACG_Room. | ||
| 38094 | LD BC,8 | BC=0008 (the distance between the entities). | ||
| 38097 | LD A,3 | A=3 (the number of key pieces to place). | ||
| PlaceKeyPieces_Loop | 38099 | EX AF,AF' | Save the key piece counter in AF'. | |
| 38100 | LD A,(DE) | Fetch the next room. | ||
| 38101 | LD (HL),A | Write it to the entity. | ||
| 38102 | ADD HL,BC | Move HL on to the next entity. | ||
| 38103 | INC DE | Move DE on to the next room. | ||
| 38104 | EX AF,AF' | Restore the key piece counter from AF'. | ||
| 38105 | DEC A | Decrease the key piece counter by one and loop back to PlaceKeyPieces_Loop until all three have been placed. | ||
| 38106 | JR NZ,PlaceKeyPieces_Loop | |||
| 38108 | RET | Return. | ||
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