The value stored in the a0 register is writen to the address we set our breakpoint to.From the logic around that area the following can be observed: In the example above a write breakpoint has been set and the instruction at 0x0883F114 is responsible for writing to that address. The above screenshots show a write breakpoint being set and how the debugger looks when it is hit. To avoid the breakpoint being hit in unwanted cases it may be necessary to continue past these using the debugger (by clicking the "Go" button) or nop out/change the address these functions similar to what is described below. The game will often read/write to an address in a number of different functions. Play the game to trigger the condition for the breakpoint to be hit.Click the "Breakpoint" button, enter the address of the value found in step 4 and configure the conditions under which the breakpoint should be triggered.Open the PPSSPP Disassembler (Debug > Disassembly.).No-op the logic responsible for decreasing the health value (in this case we would set a write breakpoint).Typically 0x08802000 is unused by games and is safe for writing custom logic to. Jump to a subroutine created by the cheat when the value is read from (in this case we would set a read breakpoint).Rather than using the cheat engine to set the value direct it the compatibility of the cheat can be increased by instead rewriting the logic of the game.įor example, when making an infinite health cheat there are a couple of ways to accomplish this:
#PPSSPP CHEATS CODE#
Use the disassembly tool to determine what code changes the value.īecause the offsets of data addresses may not be consistent across emulator versions and physical hardware it makes our job a little harder.
#PPSSPP CHEATS PSP#
This gives the following 2 potential PSP memory addresses for the variable: The user memory starts at offset 0x01540000 in the process memory.
In the above example the search results have been filtered to 2 possible addresses.
#PPSSPP CHEATS PC#
Determine the address in user memory where the value is located by subtracting the offset where user memory starts in the PC process and then adding 0x08800000.Try to reduce the search results to as small a number as possible. Use the search options in Cheat Engine to find a list of potential addresses.Set the memory scan start address to the address where the user memory starts.Use Cheat Engine to find the address of the variable you want to modify In the above example the user memory starts at 0x01540000 in the process memory. Repeat the above 2 steps until you are able to filter the address down to a single result in Cheat Engine the address of this result is where the user memory starts.Set the first 4 bytes of the user memory to something you can easily search for in PPSSPP.Navigate to the start of user memory by double clicking on the "0x08800000 (User Memory)".Open the PPSSPP Memory Viewer (Debug > Memory Viewer).Ensure the "MEM_MAPPED" setting is enabled in the settings.ģ.Select the PPSSPP process from the list.Launch PPSSPP and open the game you want to make cheats for.An understanding of the basic MIPS instructions.
#PPSSPP CHEATS HOW TO#
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