DOOM Legacy is a source port of the original DOOM for PC, which plays DOOM, DOOM 2, Final DOOM, and Heretic. PSP Legacy is DOOM Legacy for the PSP, which was ported by kgsws and later updated by Duke. I've made some additional changes for things that annoyed me when playing.
Change log:
Fixed auto map rendering. Toggle with START button. You can zoom in by holding △ and zoom out by holding ◻.
DOOM 1 - E3M1 no longer has clipped geometry and sprites in the beginning (bug in GU hardware renderer).
DOOM 2 - MAP01 no longer has invisible walls and flats (BSP precision issue).
Stick input is now analog and not digital. Added sensitivity controllers for both X and Y.
Increased the number of sound channels from 16 to 24.
Optimized sound mixing code.
Bugs:
Standby will most likely crash the game (not related to my changes).
Some levels have rendering errors (holes in floors and walls), but these are also found in the PC version of DOOM Legacy and has nothing to do with this port.