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Old October 24th, 2012, 10:35 PM
aroenai
Unhatched Egg
 
Join Date: Oct 2012
Gender: Male
Quote:
Originally Posted by Bond697 View Post
just FYI, the code to seed emerald's prng actually does exist in the game. all you would need to do is branch to this(and maybe turn on timer1 if it's not already, but that's easy) at some point and you're set. it was going to work exactly like fire red and leaf green.

it's just never used:


Code:
ROM:08000560             @ =============== S U B R O U T I N E =======================================
ROM:08000560
ROM:08000560
ROM:08000560             @ void __fastcall seedRNG__()
ROM:08000560             seedRNG__:
ROM:08000560 10 B5                       PUSH    {R4,LR}         @ this function never runs
ROM:08000562 06 48                       LDR     R0, =0x4000104  @ Timer1Data
ROM:08000564 04 88                       LDRH    R4, [R0]
ROM:08000566 20 1C                       MOVS    R0, R4          @ Timer1Data to r0
ROM:08000568 6F F0 46 F8                 BL      setRNG__        @ set rng state (0x3005D80) to result of timer1
ROM:0800056C 04 49                       LDR     R1, =0x4000106  @ T1CNT
ROM:0800056E 00 20                       MOVS    R0, #0
ROM:08000570 08 80                       STRH    R0, [R1]        @ turn off timer1
ROM:08000572 04 48                       LDR     R0, =0x2020000
ROM:08000574 04 80                       STRH    R4, [R0]        @ store the result of timer1 to 0x2020000
ROM:08000576 10 BC                       POP     {R4}
ROM:08000578 01 BC                       POP     {R0}
ROM:0800057A 00 47                       BX      R0
ROM:0800057A             @ End of function seedRNG__
ROM:0800057A
ROM:0800057A             @ ---------------------------------------------------------------------------
ROM:0800057C 04 01 00 04 dword_800057C:  .long 0x4000104         @ DATA XREF: seedRNG__+2r
ROM:08000580 06 01 00 04 dword_8000580:  .long 0x4000106         @ DATA XREF: seedRNG__+Cr
ROM:08000584 00 00 02 02 dword_8000584:  .long 0x2020000         @ DATA XREF: seedRNG__+12r
Code:
 
ROM:0806F5F8             @ =============== S U B R O U T I N E =======================================
ROM:0806F5F8
ROM:0806F5F8
ROM:0806F5F8             @ void __fastcall setRNG__(unsigned short T1Dat)
ROM:0806F5F8             setRNG__:                               @ CODE XREF: seedRNG__+8p
ROM:0806F5F8 00 04                       LSLS    R0, R0, #0x10   @ dumb typecasting
ROM:0806F5FA 00 0C                       LSRS    R0, R0, #0x10
ROM:0806F5FC 02 49                       LDR     R1, =0x3005D80  @ rng buffer
ROM:0806F5FE 08 60                       STR     R0, [R1]        @ set rng to T1Dat
ROM:0806F600 02 49                       LDR     R1, =0x20249BC  @ rng frame counter
ROM:0806F602 00 20                       MOVS    R0, #0          @ set counter to 0 to signify starting seed
ROM:0806F604 08 70                       STRB    R0, [R1]
ROM:0806F606 70 47                       BX      LR
ROM:0806F606             @ End of function setRNG__
Can someone post an .ips patch that uses the built in code for Emerald, and possibly port it to R/S? The reason I ask is the batteries finally died in my copies of R/S/E so I wanted to start using my EZ Flash 3in1 and EZ Flash IV which both lack a RTC (gbata patched).

Edit: Oh wait, would that just be 61 05 00 08 at 0x478 for Emerald?
Edit 2: Nope white screen

Last edited by aroenai; October 25th, 2012 at 06:21 PM.
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