Nice find, I will look forward to your further testing. Using the US version, in VBA and Bizhawk I've only been able to make the game reset itself at best. This might be specific to the VC version so please do test on GBA/NDS/GB Player. I would like to try too but I'm afraid I haven't been active in this game for a while so I don't know how to make Mario into a barrel (this might not be possible in both VBA and Bizhawk btw iirc due to an emulation problem).
[16:36:31] <Mothrayas> I have to say this argument about robot drug usage is a lot more fun than whatever else we have been doing in the past two+ hours
[16:08:10] <BenLubar> a TAS is just the limit of a segmented speedrun as the segment length approaches zero
08057084: 4A07 ldr r2, [$080570A4]
08057086: 79D1 ldrb r1, [r2, #7] ; Load byte from 0x203FFFF
08057088: 2004 mov r0, #4
0805708A: 4240 neg r0, r0
0805708C: 4008 and r0, r1 ; Clear bottom two bits
0805708E: 2101 mov r1, #1
08057090: 4308 orr r0, r1 ; Set bottom bit
08057092: 71D0 strb r0, [r2, #7] ; Store back to 0x203FFFF
08057094: 4904 ldr r1, [$080570A8]
08057096: 2000 mov r0, #0
08057098: 8008 strh r0, [r1, #0] ; Store 16-bit value 0x0000 to 0x2000050
0805709A: 2040 mov r0, #64
0805709C: F183 FB14 bl $081DA6C8
---
081DA6C8: 4B04 ldr r3, [$081DA6DC]
081DA6CA: 2200 mov r2, #0
081DA6CC: 701A strb r2, [r3, #0] ; Disable platform interrupts
081DA6CE: 4B04 ldr r3, [$081DA6E0]
081DA6D0: 2200 mov r2, #0
081DA6D2: 701A strb r2, [r3, #0] ; Acknowledge pending interrupts
081DA6D4: 3BFA sub r3, #250
081DA6D6: 469D mov sp, r3 ; Reset stack pointer
081DA6D8: DF01 swi #1 ; Reset sound registers
081DA6DA: DF00 swi #0 ; Reset gameNice find, I will look forward to your further testing. Using the US version, in VBA and Bizhawk I've only been able to make the game reset itself at best. This might be specific to the VC version so please do test on GBA/NDS/GB Player. I would like to try too but I'm afraid I haven't been active in this game for a while so I don't know how to make Mario into a barrel (this might not be possible in both VBA and Bizhawk btw iirc due to an emulation problem).
If people think it might be useful, I could add a way in mGBA to trap the syscall that causes the game to reset so that A) a savestate can be taken and B) a backtrace can be discovered to see what's causing this.
[16:36:31] <Mothrayas> I have to say this argument about robot drug usage is a lot more fun than whatever else we have been doing in the past two+ hours
[16:08:10] <BenLubar> a TAS is just the limit of a segmented speedrun as the segment length approaches zero
Based on what has been said so far in the thread, my guess is that high jumping on a barrel always causes the game to reset (or crash on not pc emulator). Somewhere along the line, the bit changed to the value you mentioned. So the problem would be finding what causes the bits to change to that value correct? Would your addition help with this?
[16:36:31] <Mothrayas> I have to say this argument about robot drug usage is a lot more fun than whatever else we have been doing in the past two+ hours
[16:08:10] <BenLubar> a TAS is just the limit of a segmented speedrun as the segment length approaches zero
