[Bo]Trops has released another version of his homebrew Sega Master System/Game Gearemulator called PSPMaster today, updating it to v009 beta4. PSPMaster is one of the favourite SMS/Game Gear emulators for the PSP for a couple of reasons, firstly for the huge feature list and the amount of compatible ROMs and secondly for the amount of updates that [Bo]Trops fires out on a regular basis. The last version of PSPMaster was released not even a week ago! Here's the v009 beta4 changelog:

* New high definition renders. Be sure to change the CPU clock to 300MHz to get a decent speed.
* Some minor changes

Now the changelog isn't massive, but the addition of new high definition renders is a huge update and as long as your PSP's battery is charged up enough to run at 300Mhz then you will notice a significant graphics improvement. This is one of the few emulators that still comes in firmware 1.0 and 1.5 formatted eboots so make sure you download the correct one!