- test v1
cps2emu is quick & dirty porting from CPS2PSP(NJEMU).

- test v2
add sound support.
add volume and frameskip control.
fix color issue.

- test v3
update cpu core for more compatible.
add auto frameskip.

- test v4
change cache format to compressed type.
sound sample rate set to 22050Hz.
rescale screen resolusion.
print messages on screen.

* control
A, B, X, Y, L, R: Button 1, 2, 3, 4, 5, 6
Select : Insert coin
Vol +/- : Volume control
Select + Vol +/- : Frameskip control
L + R + Start or Select : Quit

- in Vertical mode
Vol -, Vol +, L, R, A, B: Button 1, 2, 3, 4, 5, 6
Start + Vol +/- : Volume control
