Over the weekend ZX-81 released PSPXTI v1.2.4 - an emulator mimicking the Texas Instruments TI-92 graphing calculator.
PSPXTI is ported from Jonas Minnberg's XTiger.
PSPXTI v1.2.4 changes:
Fix IR keyboard issue with fw >= 3.80 for FAT PSP
Put Danzeff keyboard in a better location
Virtual keyboard is now usable in the file requester menu to specify the first letter of a file
Add music in EBOOT "Below The Arctic Ocean" from Azhrak (see jamendo)
Tested with 4.01-m33 on psp slim