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Top Document: Atari 8-Bit Computers: Frequently Asked Questions
Previous Document: 13.14) What is the Atari XEP80 Interface Module?
Next Document: 13.16) What games run only on the 400 and 800 models?

13.15) What makes some XL/XE software incompatible with the 400/800?

Konrad M.Kokoszkiewicz, mailto:draco@mi.com.pl writes:

XL/XE software won't work on 800 if:

1) it uses shadow RAM at $C000-$CFFF and $D800-$FFFF
2) it uses RAM expansions at $4000-$7FFF controlled by PORTB $D301
3) it uses specific XL OS functions (like JNEWDEVC)
4) it uses illegal XL OS addresses.
5) it uses European Charset :)