Mario Kart 64 Hacking General Discussion

[queueRAM]

I have identified where the title screen logo is referenced from. The logo is stored in MIO0 block at ROM offset 0x719480 and is stored as RGBA32 256x128 data (thanks to shygoo for helping locate it). Keeping with the liberal use of segmented addresses for compressed data, the logo is referenced by segmented address 0x0F0D7510 in asm function at 8006EE44/06FA44. I used the following code to mock up a "1500cc" variant of the logo.

Code:

​// assign segment 0F base
// Title logo: 719480 / 0F0D7510
origin 0x641F70
base 0x0F000000

// store MIO0 texture in unused space at end of ROM since it will probably be larger
origin 0xBEB000
title_logo:
insert "textures/00719480.mio0"
align(0x4)
title_logo.end:

// update asm pointer to 0F4D9090
origin 0x06FA4C // 8006EE4C
lui   a0, (title_logo >> 16)
lui   a1, 0x8019
lw    a1, -0x2650(a1)
ori   a0, a0, (title_logo & 0xFFFF)
addiu a2, zero, title_logo.end - title_logo

I also went ahead and mocked up some TKMK00 encoded 1500cc race types for the menus. krom, if you want to include these in your 1500cc hack, let me know what values you want and I'll generate them.