I’ve run into trouble with b?branch not working as expected by the nVidia Option Rom Fcode.

What Openbios does now for b?branch is:

From fcode.fs:
===
\ b?branch ( continue? -- )
\   Conditional branch FCode. Followed by FCode-offset.

: b?branch
fcode-offset 0< if \ if we jump backwards, we can forsee where it goes
   ['] do?branch ,
   resolve-dest
   execute-tmp-comp
else
   setup-tmp-comp ['] do?branch ,
   here 0
   0 ,
then-
; immediate
===

I fond some code from SLOF that may work a little better:

: b?branch ( flag -- )

   ?compile-mode IF

      read-fcode-offset ?negative IF

         dest-on-top postpone until

      ELSE

         postpone if

      THEN

   ELSE

      ( flag ) IF

         fcode-offset jump-n-ip       \ Skip over offset value

      ELSE

         read-fcode-offset

         ?jump-direction jump-n-ip

      THEN

   THEN

; immediate

Unfortunately it’s not just a simple copy and paste, I get errors when trying to compile Openbios with this code.

When you have time, could you help me step though it and figure out where it is failing, and how to fix it, I’m just not very good at C and could really use some help from someone that understands what the code is trying to do, and what I need to port over from SLOF to get it to compile.

Thanks,

James