Zx-81’s second update is version 1.0.2 of the recently released Vectrex emulator for PSP: PSPVE.
Changes:

Major speed improvements:

6809 emulation
vector rendering
remove vector cash (buggy and time consuming)

Sound emulation completely rewritten and inspired from 8910 driver of xmame.
The rotate 90′ view is now much faster and it is used as default render mode.
Save state modification, it is now […]

You may not have heard of it before, but Zx-81 brings something new to the PSP: Vectrex. PSPVE is a port of the VecX emulator by Valavan Manohararajah.
It’s a first release, work still remain, the sound is really crappy, the rot90 render mode should be improved, the speed is not so good as well etc […]