[Other] HackMew's Knowledge

[erusanma]

I have a question about your debbuger,because the command prompt dysplays this message:

..............
Unknown file type pokemon.

Also,when trying to open a fire red rom,only a white image is displayed in the emulator.

But apart from all this all your tools are exellent,specially xse because I really like scripting in an easy way(not like pokescript or scripted).

Sorry for any mistake I commit but English is not my native language.

[NintendoBoyDX]

This is way more complicated than it needs to be... 080440F4 is the shiny decision routine. Go to 0804411E and replace it with 00 20. This is the spot that it checks whether the value is greater or less than 7. Replacing that will make the value always 00 right before the check, and that means all pokemon will be shiny. Much easier to replace 2 bytes.

just throwin that out there

[YouListeningROMs]

With ASM, how would you do modulo?

[NintendoBoyDX]

Originally Posted by YouListeningROMs

With ASM, how would you do modulo?

There are a couple of ways in fr. There is software interrupt 0x6, which is a bios function call that does division and modulo. There is routine 081E4018 developed by gamefreak, that does division and modulo as well.

R0 = dividend
R1 = divisor

returning
R0 = quotient
R1 = modulo answer

081E4684 is another routine made by gamefreak that does modulo only.

A few other math routines:
081E460C: another division routine
081E3B9C: square root, calls swi 0x8

I've stumbled across a few others that I dont remember..

[YouListeningROMs]

Originally Posted by NintendoBoyDX

There are a couple of ways in fr. There is software interrupt 0x6, which is a bios function call that does division and modulo. There is routine 081E4018 developed by gamefreak, that does division and modulo as well.

R0 = dividend
R1 = divisor

returning
R0 = quotient
R1 = modulo answer

081E4684 is another routine made by gamefreak that does modulo only.

A few other math routines:
081E460C: another division routine
081E3B9C: square root, calls swi 0x8

I've stumbled across a few others that I dont remember..

Thank you for your assistance.

[truekidmoney]

Hey guys i have a question how do i get the results lesson1.bin this:
03 B5 03 48 00 68 03 49 80 89 08 80 03 BD C0 46
0C 50 00 03 D0 70 03 02
into my rom?

[Manipulation]

Use a Hex Editor and insert the bytes into free space ending with a 0, 4, 8 or C.

[CallarinCreator]

kan u post something on xse? it aint wantin to work for me. it will work. but it shuts down after like a second.

[Deokishisu]

Originally Posted by CallarinCreator

kan u post something on xse? it aint wantin to work for me. it will work. but it shuts down after like a second.

O poor English, struck down in its prime.

Anyway, this is because of the auto update feature. Since Hackmew's site is down, it tries to update, fails, and closes. To fix it, go into your .ini file and change it so that the AutoUpdateCheck equals zero.

So that line should look like this:
AutoUpdateCheck=0

[gogojjtech]

These are extremely helpful ( and long ) well great job hackmew

[Chaos Rush]

I decided to take a crack at HackMew's ASM challenge, and I succeeded!


This is what I modified the routine to:

.text
.align 2
.thumb
.thumb_func
.global lesson1

main:
	push {r0-r1, lr}
	ldr r0, .PLAYER_DATA
	ldr r0, [r0]
	ldr r1, .VAR
	ldrh r0, [r0, #0xC]
	strh r0, [r1]	
	ldr r0, .PLAYER_DATA
	ldr r0, [r0]
	ldr r1, .NEXT
	ldrh r0, [r0, #0xA]
	strh r0, [r1]
	pop {r0-r1, pc}


.align 2
.PLAYER_DATA:
	.word 0x0300500C
.VAR:
	.word 0x020270B6 + (0x800D * 2)
.NEXT:
	.word 0x020270B8 + (0x8000 * 2)

And the XSE script:

#dynamic 0x800000
#org @main
callasm YourASMoffset
buffernumber 0x0 LASTRESULT
buffernumber 0x1 0x8000
msgbox @msg MSG_FACE
end


#org @msg
= Your Trainer ID is [buffer2].\nYour Secret ID is [buffer1].

Going to do my best to get ASM down...

[FBI agent]

Originally Posted by Chaos Rush

I decided to take a crack at HackMew's ASM challenge, and I succeeded!

Spoiler:

This is what I modified the routine to:

.text
.align 2
.thumb
.thumb_func
.global lesson1

main:
	push {r0-r1, lr}
	ldr r0, .PLAYER_DATA
	ldr r0, [r0]
	ldr r1, .VAR
	ldrh r0, [r0, #0xC]
	strh r0, [r1]	
	ldr r0, .PLAYER_DATA
	ldr r0, [r0]
	ldr r1, .NEXT
	ldrh r0, [r0, #0xA]
	strh r0, [r1]
	pop {r0-r1, pc}


.align 2
.PLAYER_DATA:
	.word 0x0300500C
.VAR:
	.word 0x020270B6 + (0x800D * 2)
.NEXT:
	.word 0x020270B8 + (0x8000 * 2)

And the XSE script:

#dynamic 0x800000
#org @main
callasm YourASMoffset
buffernumber 0x0 LASTRESULT
buffernumber 0x1 0x8000
msgbox @msg MSG_FACE
end


#org @msg
= Your Trainer ID is [buffer2].\nYour Secret ID is [buffer1].

Going to do my best to get ASM down...

Spoiler tags, pls!
Also, you don't need to load player data twice.
It should till work without doing this the second time:
ldr r0, .PLAYER_DATA
ldr r0, [r0]

EDIT: I lied, the way you did it, you did need to load it twice (or subtract :D).

[karatekid552]

Almost all of the reference links for the ASM tutorial are broken. I have found a few of them, would it be alright for me to post them here? Or should I pm them to DrFuji/giradalkia to add to the end of the tut?

Edit: only two are broken.... Wow, I remember that being a lot more last time....

Edit2: I guess since no one has objected it is fine for me to post the links here:


Assembly Wikipedia: (So easy to find it really wasn't broken, but whatever) http://en.wikipedia.org/wiki/Assembly_language

ARM7DTMI Technical Manuel: http://infocenter.arm.com/help/topic...c/DDI0210B.pdf

Tonic: Whirlwind Tour of ARM Assembly: http://www.coranac.com/tonc/text/asm.htm

Hope these help anyone who wants to learn ASM.

[Kurapika]

Since I see people asking questions here, I have a problem using ldr with cmp. I am making a code that compares two words, one located in the RAM and the other located in the ROM. so what I do:

Spoiler:

ldr r1, .word1 ldr r1, [r1] ldr r2, .word2 ldr r2, [r2] cmp r1, r2 beq YayTheyEqualz ...

The problem is, the jump never occurs even when the words are equal... So I tried this:

Spoiler:

ldr r1, .word1 ldrh r1, [r1] ldr r2, .word2 ldrh r2, [r2] cmp r1, r2 beq SecondHalf ... SecondHalf: ldr r1, .word1 ldr r1, [r1, #0x2] ldr r2, .word2 ldrh r2, [r2, #0x2] cmp r1, r2 beq YayTheyEqualz ...

And this 2nd code works correctly but takes more space and it is more complicated. So, I'm wondering if ldr and/or cmr commands have some particular behaviour that makes the first code not working??? Or am I just doing something wrong?

[karatekid552]

Originally Posted by Kurapika

Since I see people asking questions here, I have a problem using ldr with cmp. I am making a code that compares two words, one located in the RAM and the other located in the ROM. so what I do:

Spoiler:

ldr r1, .word1 ldr r1, [r1] ldr r2, .word2 ldr r2, [r2] cmp r1, r2 beq YayTheyEqualz ...

The problem is, the jump never occurs even when the words are equal... So I tried this:

Spoiler:

ldr r1, .word1 ldrh r1, [r1] ldr r2, .word2 ldrh r2, [r2] cmp r1, r2 beq SecondHalf ... SecondHalf: ldr r1, .word1 ldr r1, [r1, #0x2] ldr r2, .word2 ldrh r2, [r2, #0x2] cmp r1, r2 beq YayTheyEqualz ...

And this 2nd code works correctly but takes more space and it is more complicated. So, I'm wondering if ldr and/or cmr commands have some particular behaviour that makes the first code not working??? Or am I just doing something wrong?

Would you mind giving us all of the ASM in the regular format? It is really tough the read this way.

[Kurapika]

code 1:

Spoiler:

http://pastebin.com/raw.php?i=yJicZbCv

code 2:

Spoiler:

http://pastebin.com/raw.php?i=XaKjiPPY

The first one doesn't jump to TheyAreEqualz even when it should, the second code works perfectly for me. (Sorry, for some reason, line skips are removed from my posts ;_; I think it's just my ****** Internet -.-')

[karatekid552]

Originally Posted by Kurapika

code 1:

Spoiler:

http://pastebin.com/raw.php?i=yJicZbCv

code 2:

Spoiler:

http://pastebin.com/raw.php?i=XaKjiPPY

The first one doesn't jump to TheyAreEqualz even when it should, the second code works perfectly for me. (Sorry, for some reason, line skips are removed from my posts ;_; I think it's just my ****** Internet -.-')

From looking at your code, both routines are loading different things. Parts are loading words and others are loading half-words and neither lines up with the other routine. That is probably where your problem lies. A word is 4 bytes and a half-word is 2 bytes. Take that as you wish.