6502: Version check might not be looking at the right page

[dstelzer]

I don't really understand how the paging system works, but can we necessarily assume the header will always be at the bottom of memory? We should probably use the readdata subroutine when we need to check the version for things like $67. Or is the header always kept available?

[dstelzer]

According to #87 it works fine, the header is never paged out. I could comment out the jmp op_bstyle and let it fall through, though.