PPSSPP-patches

My romhacks, fixes and workarounds for PPSSPP games and apps.

Docs

Extremely useful (though contradictory)

Additional resources

How to use "Condition" in debugger

Local guides

(not something readily achievable with CWCheat functionality)

Sims 2 The – Teleport anywhere
TDU – repack game to improve graphics and performance (complementary to the CWCheat patches)
TDU – (other) interesting parameters (if you feel adventurous)
TDU – Teleport anywhere, including secret islands (or "assembly for beginners")

Templates

Pointer

Below is correct syntax,

_L 0x6AAAAAAA 0xVVVVVVVV
_L 0x000Y0001 0xIIIIIIII

AAAAAAA = pointer location
IIIIIIII = pointer offset (subtract this value to the address to get effective address)
VVVVVVVV = value to write
Y = 3 for byte write, 4 for halfword and 5 for word)

Must one clear the (fake) offset register after use — No.

Safety checks

Taken from Fired Up (the game),

_C0 Infinite ammo [Enable]
_L 0xE00200A0 0x000BDFE4 // check, 1/2
_L 0xE001AE05 0x000BDFE6 // check, 2/2
_L 0x200BDFE4 0x00000000 // nop
//
_C0 Infinite ammo [Disable]
_L 0xE0020000 0x000BDFE4 // check, 1/2
_L 0xE0010000 0x000BDFE6 // check, 2/2
_L 0x200BDFE4 0xAE0500A0 // orig
//
// 088BDFE4:AE0500A0 // orig
// 088BDFE4:00000000 // mod
//

Safety checks – pointers

For PSP game pointers safety checks, there is a CWCheat lifehack discovered/invented in 2024. Since,

PSP main RAM addressing starts from 0x08000000.
PSP uses MIPS Little-Endian addressing.

Reference for both points. It is possible to check pointer validity (with very high probability) by,

Adding +0x02 to the pointer address, to position to pointer head (in Little-Endian scenario).
Checking if pointer head (halfword value) is greater than 0x07FF, i.e., 0x0800xxxx or greater.

Example,

_C1 Vehicle - Max HP
_L 0xD16A6B66 0x003007FF // check, vehicle ptr head (LE)
_L 0x616A6B64 0x000000FF // set byte to 0xFF.
_L 0x00000001 0x000003E1 // vehicle hp (993)

Other notes

CWCheat does not obey the traditional virtual memory mapping scheme, so to convert from the traditional address to the CWCheat one, subtract 0x08800000 HEX from it. Or use the following tool,
```
python3 helpy.py
```

Update 2023+ – Note about some patches

In more modern PPSSPP builds (for example, PPSSPP 1.13.2) it was observed that some patches are being applied automatically, thus increasing playability, performance, and experience for general players. For example,

Test Drive Unlimited [US] – remove GBA-like pixelization.

If you observe that the patch was already applied, then there is no need to apply it again. Just enjoy it.

TAbdiukov / PPSSPP-patches

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