On Tue, 30 May 2006, BLuRry wrote:
If you could work out a memory mapping between $400-$7ff for text display and $2000-$4fff for hires graphics page 1 and 2, and also a few basic softswitches for turning on/off display modes, then you could probably execute the basic interpreter and even the apple monitor without much difficulty. :-) Hope you don't mind the zero-page getting mostly used up though.
I once designed a virtual system based loosely on the Commodore PET (or perhaps a PC with a 6502) and ported EHBASIC and a stripped-down version of the Apple ][ monitor to it. I just replaced the tty stuff with calls to my own tty code (and a translation layer since the high bit was OFF in my tty driver).
I should try again. -uso.