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28436: 'P' pressed - right
The address of this routine is found in the table of keypress handling routines at 58704. It is called from the main loop at 63210.
28436 LD A,(53760) A=ERIC's animatory state
28439 BIT 7,A Is ERIC facing left?
28441 JP Z,28216 Turn ERIC round if so
28444 CALL 28240 Is ERIC on a staircase?
28447 JR C,28453 Jump if so
This entry point is used by the routines at 28484 and 28576:
28449 INC E E=x-coordinate of spot in front of ERIC
28450 JP 28315 Check for walls and closed doors in ERIC's path
ERIC is on a staircase.
28453 RLA Does the staircase ERIC's on go up and to the right?
28454 JP C,28514 Go up a stair if so
28457 JP 28606 Otherwise go down a stair
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