apple II gs whats special about booting

i have several gs'es

1:) can i boot a 3.3 are prodos on it?

You can boot DOS 3.3 from a 5-1/4" disk II drive. You can boot ProDOS from either a 5-1/4" or a 3-1/2" disk and drive. Both size drives will plug into the disk drive connector on the back of the GS. The 5-1/4" will automatically become "slot 6, drive 1" and the 3-1/2" will automatically become "slot 5, drive 1"

2) can i use a drive controller card to run drives are do i have to use the onboard controller?

You can use either. If you plug in a controller card, you must set the slot you plugged it into to "Your Card" in the GS control panel (Ctrl-OpenApple-Esc).

3) im guessing there is some gs specific boot disk.

For GSOS, there is. But otherwise, the GS will boot pretty much any disk made for any Apple II computer.

..and one last question ..David ???

is ALL ....Apple II/+/e/c...software 100% computible with Apple IIGS ?

all GAMES exactly ???

..and one last question ..David ???

is ALL ....Apple II/+/e/c...software 100% computible with Apple IIGS ?

all GAMES exactly ???

There is no such thing as "100%" in real life. But the GS comes pretty close. As long as the software is not taking advantage of something specific to one particular model - it will be compatible. The GS doesn't have a cassette port. Anything that takes advantage of, or expects there to be firmware for the cassette interface won't work, for example.

i see

so ..all apple games on normal diskettes /140 kb/ will boot and will run ... normaly

tnx David