GTIA detecting if installed in your system
10 GRAPHICS 9
20 GOTO 20
If you get a black screen, you have the new chip. If you get a blue screen, you have the old chip.
FREDDY Chip
A Chip called "FREDDIE" was used at some systems to enhance system usage and performance.
International character set in XL/XE enable
The XL/XE has another set of letters and numbers the international, or European, character set.