[PicForth] Re: bug+workaround: code page switching

[Samuel Tardieu]

>>>>> "David" == David McNab <david at rebirthing.co.nz> writes:

David> After a few hours of chasing weird phenomena, I've found a bug
David> with PicForth's handling of code page switching around loops.

[...proposed fix...]

David> This also forces an explicit PCLATH setting at the top of the
David> loop, but could cause some unnecessary PCLATH setting code to
David> be generated.

David,

I have applied your fix (using no-cbank in begin, actually in backref)
with the following comment:

\ In a backward reference, we cannot assume that the bank will be properly
\ restored to its correct value. We could do that by remembering the
\ value it should have, but this may be an underoptimization as we may
\ need to explicitely call code in another bank just after the backward
\ reference.

I'll be releasing a new PicForth version today with this fix and
others, as I regard this one as being critical.

Thanks again.

  Sam
-- 
Samuel Tardieu -- sam at rfc1149.net -- http://www.rfc1149.net/sam