Sony Computer Entertainment boss Kaz Hirai has provided a few more details about NGP (PSP2), including information on its backwards compatibility support.
The exec told Impress Watch (via Andriasang) that retail NGP games will ship on a custom memory card format, and that each game card will have rewritable space to store save data and downloadable content.
The new handheld will be compatible with PSP software, but with no UMD slot PSP titles will run completely through emulation. Sony's in talks to get publishers to release digital versions of past PSP games.
Old PSP games bought digitally will be re-downloadable to NGP, assuming they're still within the download number limits imposed by PSN.
Impress Watch was also reportedly told by a Sony rep that NGP in its current form will not support video output.
Sega West president Mike Hayes has told CVG that the firm is "extremely optimistic" that NGP will be a sales success.