Bases Loaded 4

SZNXGUVV        Balls do not count
SXOXYUVV        Strikes do not count
The game only shows up to 2 strikes and 3 balls
PEOXGLZA        2 strikes and you're out
LEOXGLZA        4 strikes and you're out
AANZGLLA        1 ball and you walk
PANZGLLA        2 balls and you walk
ZANZGLLA        3 balls and you walk

The last two codes only work in 2-player mode
PANPUTAA + PEOETGAA     Some batters start with count of 1 and 1
ZANPUTAA + ZEOETGAA     Some batters start with count of 2 and 2