hey man, this one is a real trip down memory lane!
i wanted to point out one thing i found troublesome and also request a feature.
lemme first clarify. my family has/had an Apple IIC, and so that's what i was looking to play in emulated form recently. having already been familiar with the many other Xport projects, i decided to give the port of KEGs a shot. being unfamilair with the IIGS, i wasn't up on how to get it to boot IIC/IIE stuff. apparently going back to the original IIGS, you have to go into the system Control Panel to the Slots menu and set the system to boot from a 5.25" slot and then put your disks in that slot to get them to auto-run properly. if you don't do this, you'll be starring at the ] prompt trying to remember your DOS 3.3 commands like i was at first. this little tidbit seems to be the key to get KEGs to run the old IIC and IIE .dsk files. once i set the system to boot Slot 6 all the time, i was able to run just about every game i tried, with the usual Xport nice interface to boot
the only constructive criticism i had was in the manner the graphics are rendered. specifically, it seems like your emulator throws up blue on regions of the screen which have no signal/no color. i'm not sure if that's part of the IIGS itself, something you're debugging, or intentional, but i gotta say, a lot of the old text games are really hard on the eyes with white text on a blue background. i figure you might be able to put an option to have these regions rendered as black to make the whole thing more old-school friendly.
i haven't tried USB stuff or running my System 6 harddisk image yet, but i'll give them a go soon...
Xport rules! you know, thanks to you, we barely ever play actual Xbox games on our Xbox