Various bugs were corrected.

- RootCounter
The problem which overflow of a counter has corrected.

- SIO
When a flag of TX_ENA is ON on a control resister, the problem which is not setting the flag of TX_EMPTY on a status resister has corrected.

- CDROM
@Fixed XA sound.
@Fixed calculation of starting position then using external plug-in.
Imperfectly, it became some more good operation than previous.
@Fixed processing method when a simultaneous interrupt occurs(DATAREADY interrupt and other interrupts).

- GTE
@Fixed RTPT/RTPS.
@Fixed consumption clock of GTE instruction.
Changed into "Takes same clocks as an actual" from "Always takes 2clocks".

- Recompiler
@Fixed DelaySlot.
Tekken2 works more finely.

- MAIN
@Fixed operation at the time of starting
When a gamecode was not able to be read, boot from BIOS.