As far as i know Helwet Packard graciously began allowing HP48 bios to be downloaded in 2000 (you need it, but it is NOT part of my PSPX48 package because it's not GNU !).
Enjoy,
Zx.
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UPDATE: A new version working for 1.5 FW is now available
XTiger is an unix emulator (under X Window) of a TI-92 calculator (Texas instruments).
It was originally written by Jonas Minnberg and was closed source.
Jonas Minnberg has not worked on XTiger for quite a while and he gave Misha Nasledov the code and permission to GPL it.
I've sucessfully modified and port the source code of the 0.8 version using PSPSDK environment.
It's now working fine on PSP !
The package is under GPL Copyright and sources are included.
I've tested it only on PSP with FW 2.5 using Fanjita GTA loader, but it seems to work also on 2.x, and a 1.5 FW version is also include (generated using upspear 0.1).
Many TI92 stuff can be found on the following urls :
I've just released a new version of the PSP TI-92 calculator. We can now load basic and asm programs (.92x files) directly in this emulator.
I've modified the key mapping, and function keys are now usable with the keyboard cursor, using analog pad.
A simple game (basic arkanoid ancestor) is given as an example in this archive. You have to press select + L1 + R1 to enter in the file selector, choose the file you want to load in your TI-92 emulator. Then enter the name of the program you want to run (ex: arkanoid() ), or use the VLINK menu of the TI-92 (2nd + minus key).
I've tested this version only with 2.5FW. Nevertheless a 1.5FW version (generated using upspear 0.15) is also available in this archive.
Enjoy,
Zx.
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Edit: If you want this emulator working with TI92+ Rom, a hint is given in this thread.
Edit2: a new version working with TI92+ Rom v1.1 is available here :pspxti v1.0.3