Routines
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D97E: Handler: Is Level Complete?
Used by the routine at StartGame.
Handler_IsLevelComplete D97E LD HL,$E270 HL=InGame_Tiles.
D981 LD D,$01 D is used as a tile checker - so initialise it with 01 which is the "good" value of the first tile.
D983 LD B,$04 Set a row counter in B of 04 rows to check.
CheckRow_Loop D985 PUSH BC Stash the row counter on the stack.
D986 LD B,$05 Set a counter in B of the number of tiles to check per row.
CheckTiles_Loop D988 LD A,(HL) Load the tile value into A.
D989 CP D Jump to BailOrderIncorrect if the tile value and the tile checker value don't match.
D98A JR NZ,BailOrderIncorrect
D98C INC HL Move to the next tile.
D98D INC D Increment the tile checker by one.
D98E DJNZ CheckTiles_Loop Decrease the tile counter by one and loop back to CheckTiles_Loop until all of the tiles in this row have been checked.
D990 INC HL Increment HL by two.
D991 INC HL
D992 POP BC Restore the row counter from the stack.
D993 DJNZ CheckRow_Loop Decrease the row counter by one and loop back to CheckRow_Loop until counter is zero.
The level is complete! All tiles are in order so jump to LevelComplete.
D995 POP BC Housekeeping; clean up the stack.
D996 JP LevelComplete Jump to LevelComplete.
The level isn't complete, so discard the row counter on the stack and return.
BailOrderIncorrect D999 POP BC Housekeeping; clean up the stack.
D99A RET Return.
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