Gpsp Psp - Gamebrew

gpSP, also known as gameplaySP, is an open-source Gameboy Advance emulator compiled by Exophase for the PlayStation Portable.

Note: The emulator requires an authentic GBA BIOS image file to run. The file is 16kb and should be called gba_bios.bin (md5sum: a860e8c0b6d573d191e4ec7db1b1e4f6) and present in the same location as the EBOOT.PBP file.

To install, place the folder gpsp into /PSP/GAME/.

Copy the GBA BIOS (gba_bios.bin) that you have obtained to /PSP/GAME/gpsp/gba_bios.bin.

Supported formats

The emulator supports GBA and BIN format. To save space on the memory card, compress images GBA in ZIP-format archives.

Images should be expanded in the folder /gpsp/GBA/ROM/.

You can change the control key settings in the configuration menu. It also has a savestats feature, frameskip adjustment in attempt to run game in faster speed and mild cheat support.

Compatiblility List

Frameskip

The purpose behind frameskip is to cause the emulator to not render every frame of graphics to make the emulation closer to fullspeed.

Many games will run fullspeed without skipping any frames, however, some (particularly more graphically demanding ones) will require this.

It is recommended that you keep frameskip on auto, but manual is maintained as an option if you want it.

Cheats (CHT)

gpSP supports some functionality of Gameshark/Pro Action Replay cheat codes.

To use these, you must first make a file with the same name as the ROM you want the cheat code to apply to, but with the extension .cht.

Put this file in the same directory as the ROM. To make it use a normal text editor like notepad or wordpad if you're on Windows.

To write a code, write the type of model it is, gameshark_v1, gameshark_v3, PAR_v1, or PAR_v3.

gameshark_v1/PAR_v1 and gameshark_v3/PAR_v3 respectively are interchangeable, but v1 and v3 are not. So if you don't know which version it is, try both to see if it'll work.

After that, put a space and put the name you'd like to give the cheat. On the next several lines, put each cheat code pair, which should look like this.

AAAAAAAA BBBBBBBB

Then put a blank line when you're done with that code, and start a new code immediately after it. Here's an example of what a cheat file should look like.

gameshark_v3 InfHlthBat
6f4feadb 0581b00e
79af5dc6 5ce0d2b1
dbbd5995 44b801c9
65f8924d 2fbcd3c4

gameshark_v3 StopTimer
2b399ca4 ec81f071

After you have written the .cht file, you have to enable the cheats individually in the game menu. Go to the Cheats -> Misc menu, and you will see the cheats; turn them on here. You may turn them on and off as you please, but note that some cheats may still hold after you turn them off, due to the nature of the system. Restart to completely get rid of them.

FAQ

Q. How do I know I have the right BIOS?

Developer has been made aware that there are 2 BIOSes that has been shared around and you can check it with a hex editor: the correct BIOS begins with 0x18 and the buggy BIOS begins with 0x14.

Q. Game is running very slow.

Emulating GBA takes a number of resources and getting it done well on PSP is no simple task by any means. Some games are just going to overwhelm the emulator completely.

In some cases (a lot of early generation games fall under this category) you can improve the speed by adding an idle_loop_eliminate_target line for it in game_config.txt.

Q. Does it load ZIP roms?

Yes, with the exception of large ROM has to be unzipped (32MB).

The reason for this is that parts of the ROM are constantly loaded to memory as needed, and for this to be as fast as possible the ROM has to be present on the memory stick in raw format.

Rom selection:

Up/Down - Navigate current selection window

Left/Right - Switch between file window and directory window

Circle/Start - Select current entry

Square - Go one directory up

In game:

D-Pad - GBA D-Pad

Circle - GBA A button

Cross - GBA B button

Square/Start - GBA Start button

Select - GBA Select button

L - GBA L-Trigger

R - GBA R-Trigger

Triangle - Adjust frameksip

Frameskip adjustment:

Triangle+Up/Down - Increase/decrease frameskip

Down - Change from 0 to auto

Up - Change from auto to 0

Menu:

Up/Down - Navigate current menu.

Left/Right - Change value in current menu selection (if a value is present)

Circle/Start - Select current entry (see help for entry to see what this means)

Square - Exit current menu

Exophase: Main developer.

siberianSTAR: Zip support.

psp298: Analog nub code.