How to learn PPC by making a RPC

You can't expect learning something just by reading and observing you must practice to integrate the knowledge. This is how I learned PPC:

I first read Modding Tutorials: "Advanced [PowerPC] Author: Bad Luck Brian, PowerPC Lessons, By: Bad Luck Brian".
I Uploaded it here: https://www.mediafire.com/file/2djl9p9u2esmm79/Lessons%5BAdvanced-PPC%5D.pdf/file
Then I also used PPC Compiler By Choco uploaded here: https://www.mediafire.com/file/0es6ry30hv637ob/PPC_Compiler.exe/file
Then I tried making a RPC and uderstand what it did so I ported MW3 FPS RPC by VezahHFH on different cods to practice: https://pastebin.com/uZ7VSfiq

/*
                 * MW3 FPS RPC by VezahHFH!
                 * This function get written at the FPS Offset 0x027720C and FPS Turned ON
                 * The offset 0x10050000 is filled with null bytes and that space will be used for setting arguments to the RPC
                 *Since I don't use C# for a while I always use his Call function it works all cods if you where to change game you might want to change the offset 0x10050000 another null byte area and what function you want to overwrite (so 0x027720C would change) this works all games*/
Put the ppc code in choco PPC compiler to get the bytes tho the syntax is a bit different than what's presented below you must add % in front of registers. Ex:
lis %r28, 0x1005
lwz %r12, 0x48(%r28)
---------------------------------------------------------------------------------------------------------------------------------------
MW3 FPS RPC by VezahHFH Explained
---------------------------------------------------------------------------------------------------------------------------------------
/*
lis r28, 0x1005   this instruction should be written in memory at 0x027720C and compiled is equal to 4 bytes 0x3F,0x80,0x10,0x05 r28 = 0x10050000
lwz r12, 0x48(r28) equivalent in C++ to (int r12 = *(int*)0x10050048;) r12 gets 4 bytes from 0x10050048 r28 temporary = 0x10050048
cmpwi r12, 0 compares r12 to 0 HERE r12 is the function we want to call or 0 as we didn't call any functtion in this case jump to the end of the code this changes depending the game
beq 0x74 makes it jump to 0x277290 if r12 = 0 so jump if we didn't call nothing
lwz r3, 0x00(r28)  equivalent in C++ to (int r3 = *(int*)0x10050000;) read 4 bytes at 0x10050000 and put in as first argument
lwz r4, 0x04(r28)  equivalent in C++ to (int r4 = *(int*)0x10050004;) read 4 bytes at 0x10050004 and put in as 2nd argument
lwz r5, 0x08(r28)
lwz r6, 0x0C(r28)
lwz r7, 0x10(r28)
lwz r8, 0x14(r28)
lwz r9, 0x18(r28)
lwz r10, 0x1C(r28)
lwz r11, 0x20(r28)
lfs f1, 0x24(r28)   same thing than above but with float registers so float arguments
lfs f2, 0x28(r28)
lfs f3, 0x2C(r28)
lfs f4, 0x30(r28)
lfs f5, 0x34(r28)
lfs f6, 0x38(r28)
lfs f7, 0x3C(r28)
lfs f8, 0x40(r28)
lfs f9, 0x44(r28)
mtctr r12 move r12 in count register
bctrl    jump to count register basically call value stored at 0x10050048
li r4, 0    r4 = 0
stw r4, 0x48(r28)    write 4 bytes (should be 4 nullbytes at 0x10050048 to avoid calling same function twice
stw r3, 0x4C(r28)   r3 always contain the return value if function returns something so we store it at 0x1005004C
stfs f1, 0x50(r28) if the return is a float it will be written at 0x10050050
b 0x14   jump to end of function this changes depending on the game you can also nop until you reach the end of the branch
                 */
ready for compiler

lis %r28, 0x1005
lwz %r12, 0x48(%r28)
cmpwi %r12, 0
beq 0x74
lwz %r3, 0x00(%r28)
lwz %r4, 0x04(%r28)
lwz %r5, 0x08(%r28)
lwz %r6, 0x0C(%r28)
lwz %r7, 0x10(%r28)
lwz %r8, 0x14(%r28)
lwz %r9, 0x18(%r28)
lwz %r10, 0x1C(%r28)
lwz %r11, 0x20(%r28)
lfs %f1, 0x24(%r28)
lfs %f2, 0x28(%r28)
lfs %f3, 0x2C(%r28)
lfs %f4, 0x30(%r28)
lfs %f5, 0x34(%r28)
lfs %f6, 0x38(%r28)
lfs %f7, 0x3C(%r28)
lfs %f8, 0x40(%r28)
lfs %f9, 0x44(%r28)
mtctr %r12
bctrl
li %r4, 0
stw %r4, 0x48(%r28)
stw %r3, 0x4C(%r28)
stfs %f1, 0x50(%r28)
b 0x14

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
If interested for a PPC Class and you don't wanna learn by yourself inbox me
Skype: Jo-Milk
Twitter: @jomilk15