> ORG $FFFC ;Reset vector
>
> .WORD START-$1000 ;for 4K and $0800 for 2K ROM
>
> START
> SEI ;first instructions of standard reset code
> CLD
> ;^continue at start of rom ^
If you are setting up your reset vector like this, the
execution of code will start at $EFFE. $Exxx is not a mirror
of the game ROM. Only the odd 4K blocks ($Fxxx, $Dxxx, $Bxxx,
etc) are game ROM. The even 4K blocks ($Exxx, $Cxxx, $Axxx,
etc) contain mirrors of the TIA and RIOT registers. Therefore
your code would most likely crash.
Ciao, Eckhard Stolberg
