Routines
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E804: Populate Game Room Buffer
Used by the routines at WriteGameSpriteBuffer and Handler_KeysAndLockedDoors.
Writes one tile and its attribute into the room buffers. Clone of PopulateRoomBuffer.
Input
A Tile ID to write
PopulateGameRoomBuffer E804 PUSH AF Stash AF, DE and HL on the stack.
E805 PUSH DE
E806 PUSH HL
E807 LD HL,($F330) Advance *BufferRoomPointer past this tile.
E80A INC HL
E80B LD ($F330),HL
E80E DEC HL Point back at the tile just claimed.
E80F LD DE,$A1C4 Add the room-buffer base at BufferRoom.
E812 ADD HL,DE
E813 LD (HL),A Write the tile ID into the room buffer.
E814 LD DE,$0320 Move on to the matching attribute byte.
E817 ADD HL,DE
E818 LD A,($5C8F) A=*ATTR_T.
E81B LD (HL),A Write A to *HL.
E81C POP HL Restore HL, DE and AF from the stack.
E81D POP DE
E81E POP AF
E81F RET Return.
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