Ryochan7 has posted a new release of Doom PSP based off Lantus Source, heres whats new:
This is the fifth release of Doom-PSP v0.04 S.S. and it will be the last. Here are the changes that were made for this release.
-Compiled against newer version of the PSPSDK
A graphical glitch that periodically occurred in the other versions of Doom-PSP v0.04 S.S. has been fixed. Doom runs slightly faster now and the graphics have slightly improved.
-Menus changed slightly.
Analog nub works in menus. Holding directional buttons now works to allow faster navigation through menus.
-Cleared conflict with the default button configuration without config.ini.
-Added overclocking feature
The CPU clock speed can be changed to run at 222 MHz, 266 MHz, or 333 MHz.
This release includes the eboot files for firmware 1.0 and 1.5. This release also include the complete source code for this program.