Learning ASM

So me and AH are learning ASM now, and we've sort of figured some of it out, but there's problems when we tried to actually make a code.

So to start out, it's a really basic code. Slot cycler (U 1.0)

it should add 1 to whatever's in slot 1 (or so I thought)

Code:

---

ldr r0,=0x021D88FE
add r1,r0,#1
str r1,[r0]
bx  r14

---

and with comments (yay :D)

Code:

---

ldr r0,=0x021D88FE        ; store slot one in r0
add r1,r0,#1                ; r1 = r0 + 1
str r1,[r0]                        ; load r1 into r0
bx  r14                                ; end the branch

---

and so the ARDS comes out as

Code:

---

023FF090 012FFF11
E0000000 00000014
E59F0008 E2801001
E5801000 E12FFF1E
021D88FE 00000000
023FF090 E3520003

---

I put an R activator on it

so anyway, it work sort of... except it doesn't add 1 to the item...
I typed in 0019 in text to item to get a blue rose seed, then I checked (the blue rose seed was there)
then I tapped R and...
*poof* my blue rose seed had changed into an item with no name

I also tried making FFF0 into FFF1... but it just changed it into who knows what

EDIT: I also tried this one now:

Code:

---

ldr r0,=0x021D88FE
ldr r1,[r0]
add r1,#1
str r1,[r0]
bx  r14

---

getting this:

Code:

---

94000130 FEFF0000
023FF090 012FFF11
E0000000 00000018
E59F000C E5901000
E2811001 E5801000
E12FFF1E 021D88FE
023FF090 E3520003
D2000000 00000000

---

and it gave me the same results... :/


I'm about to try this one:

Code:

---

ldr r0,=0x021D88FE
ldr r0,[r0]
add r1,r0,#0x1
str r1,[r0]
bx  r14

---

Code:

---

94000130 FEFF0000
023FF090 012FFF11
E0000000 00000018
E59F000C E5900000
E2801001 E5801000
E12FFF1E 021D88FE
023FF090 E3520003
D2000000 00000000

---

does that seem more right?

EDIT 2: that didn't work either, that just made no modifying to it at all

Code:

---

ldr r0, Slot
ldrh r2,[r0]
add r1,r0,#0x1
strh r1,[r0]
bx  lr

Slot:
.long 0x021D88FE

---

Or how you had it...

Code:

---

ldr r0, =0x021D88FE
ldrh r2,[r0]
add r1,r0,#0x1
strh r1,[r0]
bx  r14

---

It does the same thing, the other way is just for organization and how I'm use to seeing things.

Try that. :P If it doesn't work I'll have to put another register in.

ah! thank you! I didn't think to use half words! (ok, I did for a sec but didn't know the command :P)

but! it still didn't work :P

I'm trying this one now:

Code:

---

ldr r0,=0x021D88FE
ldrh r2,[r0]
add r1,r2,#0x1
strh r1,[r0]
bx  r14

---

but it didn't work either

i take it lrdh is load half word :D

But it still doesn't explain why its adding so much :S

Hm, have you watched the value change when you're using the code? Try an activator. When I use ldrh for a half word, it's putting the bytes in reverse order. Make sure the bytes are in the correct order when you're using ldrh.

Code:

---

ldr r0,=0x021D88FE
ldrh r2,[r0]
add r2,#0x1
strh r2,[r0]
bx  r14

---

Doesn't add automatically add one to the last byte?

*joes to test it with furniture*

Ah ha! I found the problem (I hope) but it's a different problem
For some reason, it seems to loop even though I have a terminator!

I put in 3000, and I tested this code a few times. My results were that it added:
0xCC-0xCF
0x74-0x77
0x2C-0x2F

each time I tapped L and R quicker than the time before...
so that means the code does work, but it loops for some reason >_>

The code I am using for it is:

Code:

---

94000130 FCFF0000
023FF090 012FFF11
E0000000 00000018
E59F000C E1D020B0
E2822001 E1C020B0
E12FFF1E 021D88FE
023FF090 E3520003
D2000000 00000000

---

shouldn't that not loops because of the terminator though?

add = register + #immediate.

I'm definitely not the person to be asking but as I understand it, yours adds #0x1 to the address. ex. 0x02000000 goes to 0x02000001. I could be wrong.

Here's an example from one of my ASM codes I'm working on:

Code:

---

ldr r0, =0x021ECB88
add r0,#1
strb r2, [r0]

---

That takes the address, changes it to 0x021ECB89 then stores one byte from r2 to that address.

I don't wanna change the address, I wanna change what's in it, and it actually is doing that :P

here's what mine does:

ldr r0,=0x021D88FE <- takes the address
ldrh r2,[r0] <- takes what's stored in the address
add r2,#0x1 <- adds one to what's stored in the address
strh r2,[r0] <- stores it back in the address
bx r14


maybe it's a problem with the activator?

Haha, see? I was wrong :)

Anywho, I'd wait for Maniac or Toe to check out your problem. Seems like it should work to me...

pretty much, it works right in adding one to whatever's in slot one, but it keeps doing it over and over the longer you're holding down the activator :/

how do we fix that?

Quote:

---

Originally Posted by Vash

Hm, have you watched the value change when you're using the code? Try an activator. When I use ldrh for a half word, it's putting the bytes in reverse order. Make sure the bytes are in the correct order when you're using ldrh.

---

that's because of how it stores words and halfwords and bytes, it's backward :P
bx = byte number

4 bytes:
0xb1 0xb2 0xb3 0xb4

2 halfwords:
0xb2b1 0xb4b3

1 word:
0xb4b3b2b1


(sorry if I showed that wrong, I can't quite remember but that looks right >_> )

but assuming that's right, pretend you say Hello me
space will be represented by _ and every two letters will be a byte
you get it this way in bytes:
H e l l o _ m e
this way in halfwords:
eH ll _o em
and this way as words:
lleH em_o
assuming you wanna go up to dwords, you get:
em_olleH

the phrase in reverse :)

Hi. Can one of you genius's please make a code that only replaces what your standing on with the town hall?? I accidentally deleted it and when I start my game It works until I leave my house. then I can't move or anything. So I'm planning on using the co-ord mod and a code one of you guys can help me with to save my game.

I realize you guys are busy, and made things like the ds workshop to allow me to make the codes myself but I covered my town with roses,golden, which I also replaced my town hall with so I need this code. Please!! I beg of you!! You are the only reliable resources on the whole internet!! Also the reason I chose this thread was because at the beginning someone was trying to make a code similar to the real time edit. Now that we have the real time edit I need something exactly like that except you can put a predestined item in the code. I am sorry to cause this, please don't get upset.
And thank you guys so much!! :D :D

@Drew9561995: Totally wrong topic this belongs in requests :evil: But I'll tell you anyways :D ANIMAL MAP guess roughly were your town hall is place it there and the name a code but do not put an activator on it. Start your game and it should work.

Code:

---

Just so you know don't move these:
Gate
Home
Museum
Stores
Town Hall

---

@Virus:
Didn't you make a string reverser?

>______________> Real Time World Edit. :)

Quote:

---

Originally Posted by itsmeGames

pretty much, it works right in adding one to whatever's in slot one, but it keeps doing it over and over the longer you're holding down the activator :/

how do we fix that?

Quote:

---

Originally Posted by Vash

Hm, have you watched the value change when you're using the code? Try an activator. When I use ldrh for a half word, it's putting the bytes in reverse order. Make sure the bytes are in the correct order when you're using ldrh.

---

that's because of how it stores words and halfwords and bytes, it's backward :P
bx = byte number

4 bytes:
0xb1 0xb2 0xb3 0xb4

2 halfwords:
0xb2b1 0xb4b3

1 word:
0xb4b3b2b1


(sorry if I showed that wrong, I can't quite remember but that looks right >_> )

but assuming that's right, pretend you say Hello me
space will be represented by _ and every two letters will be a byte
you get it this way in bytes:
H e l l o _ m e
this way in halfwords:
eH ll _o em
and this way as words:
lleH em_o
assuming you wanna go up to dwords, you get:
em_olleH

the phrase in reverse :)

---

The longer you hold the buttons the more it is going to add. :) So, it does work, it just keeps adding and adding when you hold it down.

Indeed :D All you need to do is tap the button :D

Heres what I propose:
This way R will add and L will subtract :D

Code:

---

Item Cycler [U1.0]
94000130 FEFF0000
023FF090 012FFF11
E0000000 00000018
E59F000C E1D020B0
E2801001 E1C010B0
E12FFF1E 021D88FE
023FF090 E3520003
D2000000 00000000
94000130 FDFF0000
023FF090 012FFF11
E0000000 00000018
E59F000C E1D020B0
E2401001 E1C010B0
E12FFF1E 021D88FE
023FF090 E3520003
D2000000 00000000

---

Ok sorry. Thanks. And you all rock. Feel free to delete my other post if you want. I never thought of animal map!!

Quote:

---

Originally Posted by Area51_Hacker2

Indeed :D All you need to do is tap the button :D

Heres what I propose:
This way R will add and L will subtract :D

Code:

---

Item Cycler [U1.0]
94000130 FEFF0000
023FF090 012FFF11
E0000000 00000018
E59F000C E1D020B0
E2801001 E1C010B0
E12FFF1E 021D88FE
023FF090 E3520003
D2000000 00000000
94000130 FDFF0000
023FF090 012FFF11
E0000000 00000018
E59F000C E1D020B0
E2401001 E1C010B0
E12FFF1E 021D88FE
023FF090 E3520003
D2000000 00000000

---

---

You could shorten that easy... lol I'll add a check too so it only adds one each time you press it, hopefully when I get home my TT will be there. heh but anyways I'll post the source when I'm done with it too.

cool. I am still learning and just used the compiler.

yeah, I realized that it keeps adding >_>

the point is I don't want that :P

(I'm making "Real-Time Weapon Change" in honor of Genji 2 :D)

Someone test this for me?

Code:

---

EU Emotion Cycler:

94000130 FDFF0000
023FF090 012FFF11
E0000000 00000018
E59F000C E1D020B0
E2401001 E1C010B0
E12FFF1E 121DCBF0
023FF090 E3520003
D2000000 00000000
94000130 FEFF0000
023FF090 012FFF11
E0000000 00000018
E59F000C E1D020B0
E2801001 E1C010B0
E12FFF1E 121DCBF0
023FF090 E3520003
D2000000 00000000
L + R to cycle through slot 1 emotions

---

what game version? and also that could be a lot shorter...

EU Emotion Cycler.... HRRRM! Game Version?! Ah of course it will be JP

....



....

How can you make a code shorter?

have it check for button press in ASM so you don't need two codes with separate activators

Ah so thats how you make it shorter

Hey i cant get the slot cycler to work. It just stays as a blank no name item... Any suggestions??

Quote:

---

Originally Posted by Drew9561995

Hey i cant get the slot cycler to work. It just stays as a blank no name item... Any suggestions??

---

this one doesn't work right, the only suggestion is to not use it