Routines
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36805: Draw the portal, or move to the next cavern if Willy has entered it
 Used by the routine at 34574. First check whether Willy has entered the portal. 36805 LD HL,(32944) Pick up the address of the portal's location in the attribute buffer at 23552 from 32944 36808 LD A,(32876) Pick up the LSB of the address of Willy's location in the attribute buffer at 23552 from 32876 36811 CP L Does it match that of the portal? 36812 JR NZ,36831 Jump if not 36814 LD A,(32877) Pick up the MSB of the address of Willy's location in the attribute buffer at 23552 from 32877 36817 CP H Does it match that of the portal? 36818 JR NZ,36831 Jump if not 36820 LD A,(32911) Pick up the portal's attribute byte from 32911 36823 BIT 7,A Is the portal flashing? 36825 JR Z,36831 Jump if not 36827 POP HL Drop the return address from the stack 36828 JP 36904 Move Willy to the next cavern Willy has not entered the portal, or it's not flashing, so just draw it. 36831 LD A,(32911) Pick up the portal's attribute byte from 32911 36834 LD (HL),A Set the attribute bytes for the portal in the buffer at 23552 36835 INC HL 36836 LD (HL),A 36837 LD DE,31 36840 ADD HL,DE 36841 LD (HL),A 36842 INC HL 36843 LD (HL),A 36844 LD DE,32912 Point DE at the graphic data for the portal at 32912 36847 LD HL,(32946) Pick up the address of the portal's location in the screen buffer at 24576 from 32946 36850 LD C,0 C=0: overwrite mode This routine continues into the one at 36852.
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