User:GimmickCellar/RetroArch Cheats

RetroArch Cheats are used to modify the currently running game's state.

Why is this an article here?

Well, first, let me explain what they are made up of. Each cheat can do the following:

• Set a specific address to a specific value.
• Increase the value of the specific address by a value.
• Decrease the value of the specific address by a value.
• Run the next cheat only if the specific address is equal to a value.
• Run the next cheat only if the specific address is NOT equal to a value.
• Run the next cheat only if the specific address is less than a value.
• Run the next cheat only if the specific address is greater than a value.

These are seven total "instructions". An assembly-like syntax will be used:

set address,value # Set
inc address,value # Increment
dec address,value # Decrement
rie address,value # Run If Equal
rne address,value # Run Not Equal
ril address,value # Run If Less
rig address,value # Run If Greater

Examples

Python Generator for Rule 110 as a CHT (load the output in RetroArch)

L=range
def C(num_cells):
	H='rie';G=num_cells;F='set';J=0;M=G;I=G*2;R={F:'1','inc':'2','dec':'3',H:'4','ril':'6','rig':'7'};C=[]
	for D in L(G):C.append((F,M+D,0,f"init_n{D}"))
	S=[(1,1,0),(1,0,1),(0,1,1),(0,1,0),(0,0,1)] # Change this to change what conditions make a 1 (left,center,right)
	for D in L(G):
		T=(D-1+G)%G;U=(D+1)%G;V=J+T;K=J+D;W=J+U;N=M+D
		for(O,P,Q)in S:E=f"c{D}_p{O}{P}{Q}";C.append((F,I,0,f"{E}_init_t"));C.append((H,V,O,f"{E}_chk_l"));C.append((F,I,1,f"{E}_set_t1"));X=1-P;C.append((H,K,X,f"{E}_chk_c"));C.append((F,I,0,f"{E}_rst_t_c"));Y=1-Q;C.append((H,W,Y,f"{E}_chk_r"));C.append((F,I,0,f"{E}_rst_t_r"));C.append((H,I,1,f"{E}_chk_t"));C.append((F,N,1,f"{E}_set_n1"))
	for D in L(G):K=J+D;N=M+D;C.append((F,K,0,f"copy_c{D}_clear"));C.append((H,N,1,f"copy_c{D}_check"));C.append((F,K,1,f"copy_c{D}_set"))
	A=[]
	for(B,(Z,a,b,c))in enumerate(C):A.append(f'cheat{B}_address = "{a}"');A.append(f'cheat{B}_address_bit_position = "0"');A.append(f'cheat{B}_big_endian = "false"');A.append(f'cheat{B}_cheat_type = "{R[Z]}"');A.append(f'cheat{B}_code = ""');A.append(f'cheat{B}_desc = "{c}"');A.append(f'cheat{B}_enable = "true"');A.append(f'cheat{B}_handler = "1"');A.append(f'cheat{B}_memory_search_size = "3"');A.append(f'cheat{B}_repeat_add_to_address = "1"');A.append(f'cheat{B}_repeat_add_to_value = "0"');A.append(f'cheat{B}_repeat_count = "1"');A.append(f'cheat{B}_rumble_port = "0"');A.append(f'cheat{B}_rumble_primary_duration = "0"');A.append(f'cheat{B}_rumble_primary_strength = "0"');A.append(f'cheat{B}_rumble_secondary_duration = "0"');A.append(f'cheat{B}_rumble_secondary_strength = "0"');A.append(f'cheat{B}_rumble_type = "0"');A.append(f'cheat{B}_rumble_value = "0"');A.append(f'cheat{B}_value = "{b}"')
	A.append(f'cheats = "{len(C)}"');return'\n'.join(A)
A=15 # Change this variable to change the number of cells
D=C(A)
B=f"rule110_{A}_cells.cht"
with open(B,'w')as E:E.write(D)
print(f"saved to '{B}', now open in retroarch")

Interpreters/Implementations

• RetroArch, obviously.
• Libretro, same thing.

Known Issues

If you have more than 6,000 cheats, the rest do not work, as they leak into other parts of the settings.

Categories (if this were in mainspace)

Category:Low-level