few Gameboy bugs

[benderscruffy]

Altered Space - A 3-D Alien Adventure (USA)
during the intro the spaceship graphics are messed up
and when you start the gameplay it freezes up straight away

Mortal Kombat & Mortal Kombat II (USA, Europe)
if you choose one or two it just resets back to the developers screen

Super Chinese Land 1.2.3. Dash (J)
which ever game you choose it resets back to the title screen

Namco Gallery Volume 2 (J)
choose galaxians and during the game the top two galaxians are shown the rest are invisible

Pokemon Red-Blue 2-in-1 (U)
doesn't load either game

[taisel]

Torpedo range IIRC has some special IRQ or HALT issue some GB emulators don't handle, don't know what the case is for mgba though.

[endrift]

It also uses MBC2, which mGBA hasn't implemented yet. Zerd no Densetsu seems to jump to $0038 and get stuck, though.

[endrift]

Pushed some changes that should fix Zerd no Densestu, Torpedo Range and Hercules Eikou.

[sczther]

The Mortal Kombat compilation and possibly other compilations use their own mapper which needs to be supported. I know gekkio did some tests with it.

[endrift]

It doesn't even work in BGB. It seems extremely low priority to get working.

[benderscruffy]

works in KiGB

[sczther]

KiGB is a cluster**** of game specific hacks, no wonder everything looks like it works there :P
Just wait until somebody makes some documentation for that specific mapper

[taisel]

^ kigb "magically" works with games that rely on behavior tested by blargg's sound test roms which it fails.

[benderscruffy]

who really cares if it is full of hacks
nearly all emulators have a hack or two in them :)

[taisel]

People who write emulators trying to validate behavior by comparing to other emulators. In this case avoid validation by comparing to kigb.

[profi200]

If an emulator has to rely on patches to work correctly the platform is either totally underpowered or the emulator is crap.

[endrift]

Pushed a fix for Sumou Fighter and Urusei Yatsura.

[endrift]

MBC1M support is unlikely to arrive in 0.5, but other bug fixes may be targeted for 0.5.

[endrift]

Altered Space fixed in master, but it breaks a handful of other games so it'll take some flattening out.

[endrift]

The Galaxian bug seems to have gotten fixed at some point. The rest are MBC1M bugs, so I'm punting this now that the rest have been fixed.

[endrift]

MBC1-M issues fixed in f84af91. Pokemon Red-Blue 2-in-1 is an unlicensed bootleg and thus doesn't actually have a proper MBC in it, so it likely wouldn't really work in anything.

Note that there's a 528kiB dump of Mortal Kombat I & II floating around that claims to be a good dump. The proper dump size is in fact 1MiB and the 528kiB version won't work. (It's literally just bank 0 with banks $10-$1F (MK1) and $20-$2F (MK2) slapped on immediately after, and banks 0x30-0x3F missing.)