In 'Solar Power Generator', Miner Willy isn't always killed if he runs out of air supply at a time whilst he is standing in the solar beam:
This is because the 'Solar Power Beam' routine calls up 'Decrease the air supply' as a subroutine eight times in succession (four for each character of Willy's sprite that the beam passes through in a given time-frame), without checking whether the air in the cavern has run out. As a result, the air supply can 'wrap around' past zero, causing the final character of air on the status bar to be replenished with another eight pixels!
Anyway, I've come up with a twelve-POKE fix for this:
At #88FC, insert '18 F4 E1'.
At #8D89, insert '06 04 C5'.
(Incidentally, the operand '04' is the number of times the Air Supply is depleted by the Solar Beam in the original MM; it could be altered to make the Solar Beam less deadly, or even more so!)
[The CALL at #8D8C remains in situ.]
Finally, at #8D8F, insert 'C1 CA FE 88 10 F6'.
Edited by IRF, 07 March 2017 - 02:21 PM.