Few Game Gear ROMS not working

[Former user]

Original [issue 214](https://code.google.com/p/genplus-gx/issues/detail?id=214) created by csatech31 on 2012-04-12T09:54:43.000Z:

Not sure if these are bad dumps, but so far I found 3 roms not working....Joe Montana's Football crashes right away, Galaga '91 crashes after Namco screen, and Arena the Maze of Death crashes just before you start the game. Again, not sure if these are bad dumps. If possible, can you verify this. thanks again...

[Former user]

Comment # 1 originally posted by ekeeke31 on 2012-04-12T11:34:38.000Z:

I can confirm those crashes, must be due to some bugs in mapper implementation, though i remember having quickly tested game gear fullset once and did not noticed any issue.

Generally speaking, when reporting issues, there is a pre-filled form which ask you to give the version you are using, please don't ignore it...

[Former user]

Comment # 2 originally posted by ekeeke31 on 2012-04-12T22:11:19.000Z:

Fixed in r679. It was indeed a bug introduced in a previous revision when changing the mapper initialization code, I forgot to initialize ROM area write pointers. No games should actually write to ROM but a few still do it accidentally, which resulted in crash.