Editing 65816 Overview (section)

= Programming =
 
* The standard FPGA load ignores the upper 8-bits of all 24-bit transfers; you will still need to use the MMU to access more than 64k.
* If you are not booting to the stock MicroKernel, you will need to tell the FPGA that you have an 816 installed.  
 <nowiki>
      ; If this is a 65816, switch pin 3 from an input
      ; (for PHI0-out) to a 1 output (for ABORTB-in).
        .cpu    "65816"
        clc
        xce
        bcc     +
        sec
        xce
        stz     $1
        lda     #$03
        sta     $d6b0
+      .cpu    "w65c02"  
</nowiki>

* If you are experimenting with the F816e 24-bit 816 load for the Rev B Jr's FPGA, see the 24-bit wiki for more details: https://wiki.c256foenix.com/index.php?title=C256