Here's what happened:
I was playing a Super Castlevania IV ROM on my PSP, when suddenly the screen turned red with white text. All I could read was:
"...your psp has...
*garbled message*
Sh*t happens.... :-(
*then a bunch of symbols for the rest of the screen*"
So... wtf was that?? It froze up the game, and I was really worried that my PSP just randomly bricked, but it seems to be working fine now, running ROMs and everything... I haven't tried Castlevania again yet...
I'm using the Snes9xTYL 0.2c emulator.
Corrupted file?
Turns out the rom was just retarded. I had another one from the same place do about the same thing. It's all good now.