Routines
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88E0: Blocked: step up onto it, for things that can
Used by the routine at MOVE_OBJECT.
Only with bit 4 of the flags -- the rescued person and the grenade -- and only if the cell above the object is free. It rises there, and next frame walks on at the new height.
STEP_UP 88E0 BIT 4,(IX+$07)
88E4 RET Z
88E5 LD E,(IX+$00)
88E8 LD D,(IX+$01)
88EB INC C
88EC LD A,C
88ED CALL TEST_MAP_BIT
88F0 RET C
88F1 LD (IX+$02),C
88F4 RET
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