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Routines |
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Used by the routines at Action_Direction and Action_Run.
Finds the exit that leaves in a given direction.
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| TableFindAnExitInADirection | 9F08 | PUSH BC | Keep the direction. | |
| 9F09 | PUSH IY | |||
| 9F0B | LD B,A | |||
| 9F0C | CALL ExitsPointAtTheExitList | Call ExitsPointAtTheExitList to point IX at the exit list. | ||
| TableFindAnExitInADirection_Loop | 9F0F | CALL Table_StepThroughThreeByteRecords | Call Table_StepThroughThreeByteRecords to step to the next exit. | |
| 9F12 | JR Z,TableFindAnExitInADirection_RestoreAndReturn | Jump to TableFindAnExitInADirection_RestoreAndReturn at the end of the exit list. | ||
| 9F14 | LD A,(IX+$02) | Read this exit's destination. | ||
| 9F17 | AND A | Jump back to TableFindAnExitInADirection_Loop if byte 2 of this record is zero. | ||
| 9F18 | JR Z,TableFindAnExitInADirection_Loop | |||
| 9F1A | LD A,(IX+$00) | Read this exit's direction. | ||
| 9F1D | CP B | Jump back to TableFindAnExitInADirection_Loop unless this exit's direction is the one in B. | ||
| 9F1E | JP NZ,TableFindAnExitInADirection_Loop | |||
| TableFindAnExitInADirection_RestoreAndReturn | 9F21 | POP IY | Restore IY and BC from the stack. | |
| 9F23 | POP BC | |||
| 9F24 | RET | Return. | ||
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View the equivalent code in;
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