The saved games data are in the files STATEx.DAT where x is 1 thru 5
 and represent the five save game slots in the game.
 
 Hex address 4EE5 contains the amount of player energy. Hex 00 is max.
 Hex address 4B7C contains the number of shots for weapon 1. Hex
 address 4B7D contains the number of shots for weapon 2. Hex address
 4B7E contains the number of shots for weapon 3. Hex address 4B7F
 contains the number of shots for weapon 4. Hex address 4B80 contains
 the number of shots for weapon 5 (reset to 00 at beginning of every
 new level). 99 shots is the max amount the game allows for the
 weapons, so hex 63 thru hex FF will all result in 99 shots, but hex
 63 should be used because if more of the ammo for a weapon is picked
 up, it still adds to the value. So for example, if hex FF is used and
 ammo is picked up, the value will wrap around to 00 and then up from
 there. 
 
 Hex address 4B8B contains the number of shots for the robot's weapon.
 Unlike the regular weapons, this one seems to give the number of
 shots for whatever value is entered there. Still, hex FF or values
 near hex FF should not be used. 
 
 Hex address 4F22 begins the codes for the inventory items. Every
 other byte contains a code for an inventory item and continues until
 the hex value at address 4FEA has been reached. So, if there is a hex
 04 at address 4FEA, then address 4F22, 4F24, 4F26, and 4F28 will be
 enabled. The following list shows the codes:
 
 Hex 01 = Silver Key
 Hex 02 = Heart (replenishes energy)
 Hex 03 = N/A
 Hex 04 = Robot
 Hex 05 = Gold Key
 Hex 06 = Bomb (kills all enemies on screen)
 Hex 07 = Lightning stopper
 Hex 08 = Robot ammo (2 shots)
 
 The maximum number of inventory items is 100 (hex 64), but since the
 game adds picked up items at the end and scrolling thru the items
 doesn't wrap around from 1 to 100, it would take a long time to find
 the new items to use.