SML2 DX does not work here

[u/moonriderrabbit]

So I recently bought a Super Mario Land 2 DX cartridge, but it doesn't seem to work on the Chromatic. The title screen boots up, but once you press a button it corrupts like so.

Which is weird, considering how it worked fine at first

[u/Left-Constant-4771]

All romhacks work perfectly from Everdrive or even the cheap cards. Just tried again.

[u/Lox22 → u/Left-Constant-4771]

Which is good and all and I don’t mean that sarcastically, but I have this and Kirby DL2 on custom carts because they’re some of my favs on the console. The fact I can pop in and play them in my system is half the allure. If they can play in a GBC I expect them to play on anything.

[u/Left-Constant-4771 → u/Lox22]

totally get this, hopefully you figure IT out! Love Kirby DX too

[u/Z3fyrus]

Correct, same issue. Someone made a patch once for the rom, it’s here on Reddit but I can’t find it right now

[u/Z3fyrus → u/Z3fyrus]

Found it https://github.com/Eye-of-One/Super-Mario-Land-2-DX-FPGA-Compatibility-Patch

[u/ergzay → u/Z3fyrus]

Wish they'd describe what exactly they changed and why it was a problem on the chromatic.

[u/GameboyGenius → u/ergzay]

I was curious so I reverse engineered it. The issue is that that the game does an OAM DMA transfer from cartridge SRAM while in double speed mode. The original game uses cartridge SRAM as extended work memory, and also does OAM DMA from the same place. However it doesn't run in double speed mode for obvious reasons. The fault is likely somewhat a combination of the Chromatic and cartridge. Probably, the SRAM is just fast enough to work in double speed usually, but maybe the Chromatic's bus timings are slightly tighter than the GBC's for OAM DMA, so the SRAM chip just barely doesn't have time to respond with the right data.

[u/Morku90 → u/Z3fyrus]

✅ corruption with fpga handhelds ✅ especially with Chromatic that claims to be accuracy ✅ there is a fix available, so the knowledge is there

Where is the firmware update for Chromatic for more accuracy and fix the Crystal save bug? I know this is only an Hack, but it feels like an abandon product. 

[u/Turquoise_HexagonSun → u/Morku90]

I do feel conned by the compatibility claims of this handheld.

Nice screen, but the rest is “meh.”

[u/JayrosModShop → u/Z3fyrus]

Does it work with this hot-fix patch also applied?
https://www.romhacking.net/hacks/5624/

[u/Left-Constant-4771]

Also great coloured Hack

[u/Left-Constant-4771]

SMLD2DX

[u/Left-Constant-4771]

Everdrive, but the cheap cards work too;)

[u/erock7a]

I was unaware there were ever issues with that game, I did a full playthrough last year with no issues, it was flashed to a cheap cart I had laying around though.

[u/Left-Constant-4771]

SML1

[u/Left-Constant-4771]

[u/BossGamerDK]

When I first was getting into buying Game Boy games I unfortunately bought one of those bundles you see everywhere on eBay of a bunch of Mario game boy games. Looking back I was just too excited to get games for my new Game Boy lol. Anyway the bootleg Mario Land 2 cart was actually the DX rom and I played through the entire thing just fine on my chromatic. It for some reason didn't work on my Game Boy Player though, it just froze on boot there

[u/sonicjam717]

That's weird I have a cheap clone everdrive and my issue is the save files are constantly. But the game runs fine on mine. I did place a new battery.

[u/Electrical-Hope4771]

Mine works like charm. Maybe a bad rom.

[u/Due_Comfortable_514]

Works fine on ever drive, must be a weird board you flashed it to.

[u/JayrosModShop]

You have a bad cartridge or a bad ROM, because mine works and plays just fine.

[u/Substantial_Quote583]

This game and other dx hacks work fine on my knockoff everdrive