[ASM & Hex✓] (Solved) Is it possible to Store/Write a Value at 08(rom) using ASM?

[chestertagat]

Here's another question is it possible to Store or Write a Value to ROM Offset (Free Space) using asm

Cause i know that through ASM you can Store/Write values to Ram for Example: 0202XXXXX = 0x800D

But is it Possible to Store/Write i Rom? Using ASM? Cause I'm gonna Implement a ATM Machine in my Hack (I Dont know if someone already implemented something like this one)

So i hope if its Possible?

My Script would be something Like This:

Spoiler:

When you talk to the Machine:
Will spit some text like: Welcome etcc.
Ask if you would like to Withraw if Yes goto @getmoneyatm (I dont know how to add Custom Multichoices box so i think when you withdraw it automatically gets 1/2 money from your bank)
Ask if you would deposit instead if Yes goto @givemoneyatm (same as above but instead of 1/2 you automatically store 1/4 of your money , Although there is no Code/Function div in ASM im sure there is a way)
Ask if you would like to view How much money you have at bank if Yes goto @showmoneybank
End

@getmoneyatm
ASK again for confirmation
run asm routine (store the calculated value your withrawing to LASTReSULT and Hopefully into ROM for Later Accesing/Modifying deduct the calculated value to your Currentmoney)
Showmoney
Display some text (buffer the value calculated)
End

@givemoneyatm
Same logic as above but the reverse

@showmoney
Callasm (Stores the currentmoney to Lastresult)
Display some text (buffer/show the money in bank)
End

I hope somebody Helps :) or maybe check something in my script/routine plan that isnt possible and show a better way to that :)

Thanks in Advance :)

 

[DarkPsychic]

Honestly ASM is far overkill for a ATM.

You can do this with Scripting,
I would suggest looking up the XSE scripting tutorial.

Also no you can't write to the ROM area with Asm as it is Read Only Memory...

 

[Touched]

It's ROM, you can't write to it. If you need a value to change, it has to be in RAM. If you need that value to be saved in your save game you have to do it in a part of the RAM that gets written to the save. The easiest way to do that is to use a variable, so why don't you just do that?

 

[chestertagat]

Also no you can't write to the ROM area with Asm as it is Read Only Memory...

Hahaha that's right I saw it from the Old ASM Thread that you cannot right to rom, a few hours after i post

this one. Hahahaha Thanks Anyway.

Honestly ASM is far overkill for a ATM.

You can do this with Scripting,
I would suggest looking up the XSE scripting tutorial.

So you are saying that i can Divide in XSE? cause the reason why i wanna do this through assembly is

because of that and this:

Everytime you restart the Game The values that you stored in RAM are cleared or moved(not sure though)

It's ROM, you can't write to it. If you need a value to change, it has to be in RAM. If you need that value to be saved in your save game you have to do it in a part of the RAM that gets written to the save. The easiest way to do that is to use a variable, so why don't you just do that?

Haha I don't know how much a Variable can hold that's why , And I havent realized until now that

variabes are saved in some point in RAM(or save or battery or whatever) .

And before this is what i think: RAM=Temp Rom = Perm Thanks for the Help ;)

but can i really do it in XSE? How about Dividing? How about saving it on a Variable ? Can i just Setvar (var) (value) ? Please Explain :D

 

[Touched]

Haha I don't know how much a Variable can hold that's why , And I havent realized until now that

variabes are saved in some point in RAM(or save or battery or whatever) .

And before this is what i think: RAM=Temp Rom = Perm Thanks for the Help ;)

but can i really do it in XSE? How about Dividing? How about saving it on a Variable ? Can i just Setvar (var) (value) ? Please Explain :D

No you can't divide a number in XSE, you need to do it in ASM.

A variable is 16 bits, so it can hold a maximum (unsigned) value of 2 ^ 16 - 1 = 65535. While that's not very large, you could use 2 consecutive variables (e.g. 0x4000 and 0x4001) and get 32 bits, which gives you a maximum value of 2 ^ 32 - 1 = 4294967295. I think FBI has a routine that does this in his ASM resource thread that you could adapt.

 

[chestertagat]

No you can't divide a number in XSE, you need to do it in ASM.

A variable is 16 bits, so it can hold a maximum (unsigned) value of 2 ^ 16 - 1 = 65535. While that's not very large, you could use 2 consecutive variables (e.g. 0x4000 and 0x4001) and get 32 bits, which gives you a maximum value of 2 ^ 32 - 1 = 4294967295. I think FBI has a routine that does this in his ASM resource thread that you could adapt.

This is what im saying to Dark Psychic , Its the main reason why I wanna use ASM .

Another question how can i customize Multichoices Boxes ? Without applying patches?

Thanks , And im very Honored because im getting infos personally from ASM Veterans(Good at it)

 

[Touched]

This is what im saying to Dark Psychic , Its the main reason why I wanna use ASM .

Another question how can i customize Multichoices Boxes ? Without applying patches?

Thanks , And im very Honored because im getting infos personally from ASM Veterans(Good at it)

You're gonna have to hex edit: https://www.pokecommunity.com/threads/165939

 

[chestertagat]

You're gonna have to hex edit: https://www.pokecommunity.com/threads/165939

Thanks for this sir!
Sir are you busy right now?
I have so many questions regarding ASM.

 

[DarkPsychic]

Thanks for this sir!
Sir are you busy right now?
I have so many questions regarding ASM.

Ok...
So I personally don't think you need asm for this.

I have a Bank System and ATM system in my hack as well and the only things I needed asm for was the fact that my Bank System was Custom. Meaning FBI created a Routine that when flag 0x250 is checked it takes the Money won from after a trainer batter and sends it into a Variable instead of the players Money bag.

He also created an Interest routine so the Bank could build interest over time. However for some reason I couldn't get that one to work, so I need to test it more....

Now with my Bank System I have one that can hold a max of $65,535 which is the max a Var can hold like stated above...
I also have one that uses two vars side by side and can hold up to 4bytes of data 0xFFFFFFFF,
But the only problem with that one I have is the fact that I can't figure out a way to buffer/print the balance to the player..

Oh and if you want to be able to divide VARs all you have to do is fire up Fire Red Hacked Engine Tool 1.1 and just add all the math specials.... simple as that

Also I do advise reading JPANs Thumb tutorial doc as its a really good read.

And also You are right about RAM but only temp vars are deleted when the game is turned off.
If you need to understand what flags and vars are check this thread out flags, vars and script tile

 

[chestertagat]

Hahaha You almost answer all the questions i wanted to ask With your answer Thanks :)

I have a Bank System and ATM system in my hack as well and the only things I needed asm for was the fact that my Bank System was Custom. Meaning FBI created a Routine that when flag 0x250 is checked it takes the Money won from after a trainer batter and sends it into a Variable instead of the players Money bag.

Do you still have the routine he gave you? cause i need to know the location of the Pointer to the Dynamic Player Money Offset :( If it is ok to you :)

Now with my Bank System I have one that can hold a max of $65,535 which is the max a Var can hold like stated above...

I have think of that earlier but i thought the max value a var can hod is only 0xFFFF
so...

I also have one that uses two vars side by side and can hold up to 4bytes of data 0xFFFFFFFF,
But the only problem with that one I have is the fact that I can't figure out a way to buffer/print the balance to the player..

I created a routine like this i dont have any problem displaying the text , my only problem is i dont know how to divide in ASM :(
Heres mine:

Spoiler:

ldr r0, =(0xMoneyOffset) 
ldr r0, [r0] 
div r0, #0x2 @Since i Dont know how to divide in ASM im writing this for the meantime.
mov r1, [r0]
lsr r0, #0x10
ldr r2, =(var1offset)
strh r0, [r2] 
lsl r1, #0x10
lsr r1, #0x10
ldr r0, =(var2Offset)
strh r0, [r1]

Oh and if you want to be able to divide VARs all you have to do is fire up Fire Red Hacked Engine Tool 1.1 and just add all the math specials.... simple as that

can you explain this to me more ?

Also I do advise reading JPANs Thumb tutorial doc as its a really good read.

Unfortunately link is Down :( If someone could re-up it somewhere :(

Thanks Sir for your answers :) Very Helpful Really :)

 

[BluRose]

Spoiler:

Hahaha You almost answer all the questions i wanted to ask With your answer Thanks :)

Do you still have the routine he gave you? cause i need to know the location of the Pointer to the Dynamic Player Money Offset :( If it is ok to you :)

Spoiler:

I have think of that earlier but i thought the max value a var can hod is only 0xFFFF
so...

I created a routine like this i dont have any problem displaying the text , my only problem is i dont know how to divide in ASM :(
Heres mine:

Spoiler:

ldr r0, =(0xMoneyOffset) 
ldr r0, [r0] 
div r0, #0x2 @Since i Dont know how to divide in ASM im writing this for the meantime.
mov r1, [r0]
lsr r0, #0x10
ldr r2, =(var1offset)
strh r0, [r2] 
lsl r1, #0x10
lsr r1, #0x10
ldr r0, =(var2Offset)
strh r0, [r1]

can you explain this to me more ?

Unfortunately link is Down :( If someone could re-up it somewhere :(

Thanks Sir for your answers :) Very Helpful Really :)

rather certain it's dma-protected and located at like 0x03005008 + 0x4
this post contains some useful infos on it, but fbi's bank routines in his asm resource thread loads directly from 0x0300500C so idk
i feel like i would have been able to say for sure yesterday ahaha

 

[chestertagat]

rather certain it's dma-protected and located at like 0x03005008 + 0x4
this post contains some useful infos on it, but fbi's bank routines in his asm resource thread loads directly from 0x0300500C so idk
i feel like i would have been able to say for sure yesterday ahaha

Thanks for that link : D Ive been searching for so long :D
However I cannot fully understand the Routine he/she wrote For I am a beginner at this ASM Language :)
Commenting On every line is very very helpful :D

Here's the Routine:

.align 2
.thumb

/*This routine does all the hard work in retrieving your current
money and stores it in vars 0x8000 and 0x8001.
0x8000 - Lower half
0x8001 - Upper half
*/

main: push {r4-r6, lr}
ldr r6, .DMA_MAP
ldr r0, [r6, #0x0]
mov r5, #0xA4
lsl r5, r5, #0x2
add r0, r0, r5
ldr r1, .OTHER_RAMLOC
ldr r1, [r1, #0x8]
bl get_amount /*Does the actual decrypting*/
ldr r1, .VAR_8000
str r0, [r1]
pop {r4-r6, pc}

get_amount: ldr r4, .DO_CALC
bx r4

.hword 0x0000
.DMA_MAP: .word 0x03005008
.OTHER_RAMLOC: .word 0x02039934
.VAR_8000: .word 0x020370B8 /*Var 0x8000-0x8001*/
.DO_CALC: .word 0x0809FD59

 

[DarkPsychic]

Hahaha You almost answer all the questions i wanted to ask With your answer Thanks :)


Do you still have the routine he gave you? cause i need to know the location of the Pointer to the Dynamic Player Money Offset :( If it is ok to you :)


I have think of that earlier but i thought the max value a var can hod is only 0xFFFF
so...

I created a routine like this i dont have any problem displaying the text , my only problem is i dont know how to divide in ASM :(
Heres mine:

Spoiler:

ldr r0, =(0xMoneyOffset) 
ldr r0, [r0] 
div r0, #0x2 @Since i Dont know how to divide in ASM im writing this for the meantime.
mov r1, [r0]
lsr r0, #0x10
ldr r2, =(var1offset)
strh r0, [r2] 
lsl r1, #0x10
lsr r1, #0x10
ldr r0, =(var2Offset)
strh r0, [r1]

can you explain this to me more ?

Unfortunately link is Down :( If someone could re-up it somewhere :(

Thanks Sir for your answers :) Very Helpful Really :)

Ok...
The Routines made by FBI are in the ASM Resource thread here on PC in the Research and Development section.
One routine is for Battle money straight to Var and the other is the Interest routine (if you use the Interest routine then you will need the Minutes framework routine there as well).

If you don't look around and keep asking for help people will start ignore you until they see you are doing it on your own and making progress... Not being rude either just some advice I was give as well way back when ^_^

When you have time look up the Binary and Hexadecimal number systems... As that will help greatly
But yes Vars are 16-bits wide or 2-bytes which = 0xFFFF (in Hex) or 65,535 (in Decimal) max vaule....

Again Check the tutorial on Flags, Vars and Script Tiles ^_^

I can tell you right now that that routine would not display a 32-bit (4byte) number using the buffernumber scripting command...
Displaying numbers from 0-65,535 are no problem with the buffernumber command in XSE but that is because the buffernumber commands only take 16-bit (2byte) numbers....

So if your Bank or ATM only needs to hold more than 65,535 then I can't help ya there my friend as I still haven't figure that one out my self... hahaha



As for the ASM tutorial doc from JPAN... Go back to that tread and until you find my post with the re-upload I posted...

Fire Red Hacked Engine v1.1
Search it, download it, open the tool, Check all the math specials then hit install, then save.....
It quite known...
If download links are ever broken, try to check in the end of the thread to see if someone has re-uploaded it ^_^

Anyway Good luck my friend

 

[BluRose]

Thanks for that link : D Ive been searching for so long :D
However I cannot fully understand the Routine he/she wrote For I am a beginner at this ASM Language :)
Commenting On every line is very very helpful :D

Here's the Routine:

as darkpsychic is very quick to point out, 0xFFFF allows for a maximum value of 65,535 in a single var. this routine deposits your amount into two vars anyways :P
warning: a lot of stuff in this spoiler

Spoiler:

@init stuff
.align 2 @aligns the function to two-bytes (16-bit commands)
.thumb @defines that the asm routine is to be thumb

/*This routine does all the hard work in retrieving your current
money and stores it in vars 0x8000 and 0x8001.
0x8000 - Lower half
0x8001 - Upper half
*/

main:
push {r4-r6, lr}		@allow these registers to be used
ldr r6, .DMA_MAP 		@load 0x03005008 into r6
ldr r0, [r6, #0x0] 		@load the values at the address in r6 (0x03005008) into r0
mov r5, #0xA4 			@put 0xA4 into r5
lsl r5, r5, #0x2 		@bitshift the value in r5 left twice and then store it in r5 *
add r0, r0, r5 			@store the sum of r0 and r5 into r0
ldr r1, .OTHER_RAMLOC 		@load the address of the ram address defined below (0x02039934)
ldr r1, [r1, #0x8] 		@load the value at address [r1 + 0x8] (0x0203993C) into r1
bl get_amount			@branches to get_amount, telling it to return when done
ldr r1, .VAR_8000 		@loads the address of .VAR_8000 (0x020370B8) into r1
str r0, [r1] 			@stores the value of r0 (probably the result of the dma decryption) into the address in r1 (the var below).  note that it stores a word and thus it also stores into var 0x8001 as well
pop {r4-r6, pc} 		@restores the registers to pre-routine state (i think)

get_amount:
ldr r4, .DO_CALC 		@loads the address of the decryption routine into r4
bx r4 				@branches off to the address of r4 to return when finished, only to return to the previous bl

.hword 0x0000 @padding

.DMA_MAP:	.word 0x03005008 @begin dma-protected stuff
.OTHER_RAMLOC:	.word 0x02039934
.VAR_8000:	.word 0x020370B8 /*Var 0x8000-0x8001*/
.DO_CALC:	.word 0x0809FD59 @routine that decrypts money amount, stores in r0

notations for the base will be denoted by the subscript number located after the number itself
important to note is that the word is likely stored in the vars formatted in little endian (flipped).
so say we had like ₽349,203,022 in the bank (yes i know that's the ruble symbol).
349,203,022₁₀ = 14D06A4E₁₆
so 0x14D06A4E would be stored into the vars like 4E 6A D0 14
the value in var 0x8000 would be 0x4E6A and the value in var 0x8001 would be 0xD014

* so real quick bitshift thing
A4₁₆ = 1010 0100₂
so when you bitshift left, you take the binary number and shift it left two spaces
this yields 0010 1001 0000₂
0010 1001 0000₂ = 290₁₆

so when you add r0 and r5 together, you get 0x290 + value at 0x03005008
according to data crystal, 0x03005008 + 0x290 is the hidden_money value, and that this value needs to be xor'd with the key
so what the decryption does is just xor the money and the key and store it into r0 + possibly something else (but i can't even check ffs)
now, to write to your money value? haha i don't know, that's why we have scripts for this (givemoney and takemoney and a lot of stuff)
bank script hint:

Spoiler:

if you want to be really cool, combine two vars to be used for your bank to get a max value of
FFFFFFFF₁₆ = 4,294,967,295₁₀