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Hey, praedo, glad you got some use out of that LA patch. I'm afraid I'm crazy busy these days (working full-time has that effect), so there's no way I could tackle the other Zelda games. I've never much cared for the Oracle games anyway, heh :) I also don't have a GBC, only a Pocket, so there's no w...

It's worth a shot. Hit me.

Yeah, dybbi what to tell you. I just played through from the beginning up to that point looking for problems, and not a single one. I can save and reload my save just fine afterward.

Hi, I've been out of town for a bit, and then it took a while to get as far into the game as you. Unfortunately - again - I can't reproduce this. Sigh. And I've taken care to make sure that what eluded me last time wouldn't again, so... You're sure the crash happens immediately after the owl's speech?

Alright, no idea if this is causing your problem, but it seems possible. In what is, I think, the map loading routine, it makes bad bankswitches when loading certain maps (in ROM at $2DED). I should have caught this before. Mea culpa . No idea why this usually doesn't screw things up, but... Anyway,...

Hm, after a bit of investigation I'm pretty sure the game only ever writes to $2100 to switch banks. And I've checked every bank write the game does during its save procedure, and at no point does it write a bad value (00, 20, etc.) Thanks for your help Mott, but TBH, at this point I don't think the...

Tried that, got nuffin'.

Can't reproduce on an emulator, sorry. Some possibilities: 1. You're doing something else to trigger this bug and ascribing it to the wrong condition (i.e. saving Bow-wow isn't the trigger, something else is) 2. The ROM didn't copy onto the flash cart correctly 3. The game is doing something weird t...

Ack! Yes, it's possible my patch has overwritten something important or another. Or it's possible that there are more bad bankswitches embedded in the code. I'll take a look ASAP and try to fix this. If you could clarify though - you say you get a white screen after saving. Do you mean by dying, the...

The "Bung Fix" is a previously made patch for the game, designed to fix the garbled map bug when running the game on Bung carts. It should fix it on the EMS ones, as well. Not sure if you can find the patch alone, but GoodGB lists the ROM as "Super Mario Land 2 - 6 Golden Coins (V1.0)...

According to the first post in this thread, the "Bung Fix" solves the garbled map. The Bung Fixes solve the Super Mario Land 2 problem (garbled map screen) ...there are three instances where the problem can occur: 1. Game writes to 3000-3FFF to perform a bankswitch [...] The Bung Fixes are...

True - I guess the average game never really needs to stream in a lot of data to VRAM quickly with music running. Usually you'd change music between levels (when you need a new tileset) and it'd only take a few frames to black out the screen and stream in a new map (between sub-levels, for instance)...

Alright, cool, I'll give that a shot. I had gotten my impression from this article about implementing a GB emulator: Since the "counter" timer triggers an interrupt when it overflows, it can be especially useful if a game requires something to happen at a regular interval. However, a Gameb...

Yeah, near as I can tell vblank interrupts aren't generated on the GB while the screen's off - a HALT (wait for next interrupt) instruction will actually lock up the system.

Currently I update my sound engine in my vblank handler, after it's done with any necessary VRAM access. This works great for keeping the music going at a steady pace - as long as the screen's on. When I do turn off the screen (for a large transfer of data to VRAM, generally), there's inevitably a s...