Routines
Prev: 9B81 Up: Map Next: 9BA9
9B93: Table: Next Record
Used by the routines at Table_FindTheRecord, TableFindAnExit, ConditionSamePlaceAsThePlayer, ExitsFindTheExitToANamedPlace, TableFindAnExitInADirection and ExitsFindTheExitToALocation.
Steps to the next record in a table.
Input
IX Pointer to the record data
Output
A The record ID
IY The record data
Table_StepThroughThreeByteRecords 9B93 EXX Switch register sets before the index is stepped.
9B94 LD DE,$0003 Move onto the next record IX=IX+0003.
9B97 ADD IX,DE
9B99 LD D,(IX+$02) Read byte 2 of this record.
9B9C LD E,(IX+$01) Read byte 1 of this record.
9B9F PUSH DE Read byte 0 of this record.
9BA0 POP IY
9BA2 LD A,(IX+$00)
9BA5 CP $FF Set flag if this is the termination character (FF).
9BA7 EXX Exchange registers.
9BA8 RET Return.
View the equivalent code in;
Prev: 9B81 Up: Map Next: 9BA9