|
ForumsSega Master System / Mark III / Game GearSG-1000 / SC-3000 / SF-7000 / OMV |
Home - Forums - Games - Scans - Maps - Cheats - Credits Music - Videos - Development - Hacks - Translations - Homebrew |
Author | Message |
---|---|
Chris
|
Gameboy 2 Game Gear
Posted: Mon Jul 05, 1999 11:39 pm
|
Does anyone out there think it would be difficult to convert Gameboy games to the
Game Gear? To my understanding the Gameboy uses a custom Z80 processor but couldn't you suplement those codes for other ones and still get the games to run? Also, how big is the character set, how big is the sprite set, and how many sprites can be controlled on screen at a time? I'm assuming the graphics and sound shouldn't be that bad to interpret, just re-direct all the sound and graphics writes to the appropriate registers and memory addresses. The two custom sound channels could be played on Channel 1 and 2 while the bass track is played on Channel 3 and the noise is played on the noise. I don't think the Game Boy can play digital sound, can it? The only major problem would be the missing button needed on the Game Gear. The game gear has 3 action buttons while the Gameboy as 4. This is a very big problem. I would have to suplement the start button by making the game check for two button inputs instead of one, like if it finds that Button 1 and Start have both been pressed then that would equal the start button on the Gameboy. I need opinions. Is this a good idea or a bad one? Chris :o) |
|
ziggy880
|
Posted: Tue Jul 06, 1999 12:00 am |
its a good idea though the opposite would be a more profitable idea the difficulty would vary Ive written for both systems gb does have digital sound if youd like to discuss this more Im normally on #gbdev on efnet |
|
Chris
|
Posted: Tue Jul 06, 1999 1:04 am |
What's efnet? |
|
ziggy880
|
Posted: Tue Jul 06, 1999 3:56 am |
irc server http://www.mirc.co.uk/ for the software you could use |
|
|
Posted: Tue Jul 06, 1999 4:47 pm |
Porting stuff would be a little more compilcated than redirecting stuff. Porting from the Gameboy to the Game Gear would be easier than the reverse, since the Gameboy processor removes some instructions, and the Gameboy has a sprite limit of 40, whereas the Game Gear supports 64. Both systems are pretty similar. I wrote a program that worked on both system. The differences in the 'main' code were quite small. All the differences were in the routines. Teh source for the Game Gear version is available at http://www.pcisys.net/~cdoty/console the Gameboy version is at http://www.gbdev.org/news/dl/source.html. It's the Frogs assembly language source. |
|