useful addresses
SystemID SMS
01F0 b h 0 Main RAM
01F1 b h 0 Main RAM
01F2 b h 0 Main RAM
01F3 b h 0 Main RAM
0303 b h 0 Main RAM X1
0302 b h 0 Main RAM X2
0307 b h 0 Main RAM X2
0305 b h 0 Main RAM Y1
0304 b h 0 Main RAM Y2
0129 b u 0 Main RAM ID
0145 b h 0 Main RAM Level?
0303 b u 0 Main RAM X1 dec
0332 b u 0 Main RAM Screen X
034C b h 0 Main RAM Screen Big
0143 b u 0 Main RAM Hp
0323 b h 0 Main RAM Actual Screen X
03B9 b u 0 Main RAM Wall
0146 b h 0 Main RAM Gun
0 S _ 1
03B9 b u 0 Main RAM Boss HP
03B7 b h 0 Main RAM Wall x
03B8 b h 0 Main RAM Wall y