SMS Plus PSP is a port of the Sega Master System Plus emulator to the Sony PlayStation Portable platform. It’s written in C and uses GU (Graphical Utility toolkit) for rendering.

Changelog:

Version 1.2.5 (December 08 2008)

* When switching games, latest save state will be automatically highlighted
* Rapid fire support – map any button to A or B autofire (‘Controls’ tab). Change the rate of autofire in the ‘Options’ tab
* Snapshots are now saved to PSP’s PHOTO directory (/PSP/PHOTO), and can be viewed in PSP’s image viewer
* File selector snapshots – while browsing for games with the file selector, pause momentarily to display the first snapshot for the game