新版主要是修正了68KCPU核心的同步问题，估计一堆游戏死机问题解决了。
1.51a
* Fixed a sync problem between main and sub 68k. Should fix the hanging
problem for some games.
1.51
* Improved bin_to_cso_mp3 tool, it should no longer complain about
missing lame.exe even if it's in working dir.
* Fixed a regression from 1.50, which caused slowdowns in Final Fight.
* Fixed some regressions from 1.50 related to sprite limit and palette
handling (caused graphical glitches in some games).
+ Added ABC turbo actions to key config.
* Some other minor adjustments.
下载： PSP用SEGA MD/SEGA CD模拟器PicoDrive v1.51a发布
