Alongside the update to PSPZX81 v1.2.0, developer Zx-81 has announced the initial release of PSPMO5. The PSP release is a direct port of Daniel Coulom's Thomson MO5 home computer emulator DCMO5, which was originally written for a variety of operating systems, including Mac OS, Windows and Unix.
As this is the initial release, the author notes that certain functions such as savestates and the like have yet to be implemented. Expect to see additional features added over time.
Download PSPMO5 v1.0.1 for Custom Firmware / PSPMO5 v1.0.1 for Firmware 1.5
PSPMO5: A Thomson MO5 Emulator for PSP v1.0.1 [Zx-81]