Have you tried this one?
http://emupage.pocketgamer.org/Downloads/Multi/YameCE/YameCE_V038g_MIPS.rar
It's YameCE and it emulates the following systems: GameBoy, PC Engine, NES, SNES. Very good and fast for GBColor and NES.
You'll also need to copy GX.DLL and GX.DLL.INI for MP 770
(in attached ZIP file
) to the emulator folder.
Then just copy some GBC or NES roms into YAMECE directory. When you run the emulator for the first time the menus will be in Japanese so be sure to change the language to english in the second menu » Language » English. Pretty easy! Then be sure to check under Settings » Details » Display if in the first drop down menu the Use GAPI setting is selected, if it's not select it to get a boost in speed. Then configure the rest as it fits best your machine, many options to choose from.
Hope this helps
Edited by Viriato 2008-03-18 4:52 PM
Attachments
----------------
MP770_GX.DLL.zip (3KB - 6 downloads)