No, it isn't. there are some tiny differences in placement of headers (binary) Compare 83pformat.txt at www.ticalc.org/pub/text/calcinfo/83pformat.txt with 8xpformat.txt inlcluded in obj8x.zip (www.ticalc.org/pub/dos/asm/obj8x.zip) --(Peter-Martijn) Henk Poley wrote: > > Van: Ronald Teune <rtwolf@gmx.net> > > > > Ti-83: **TI83** > > Ti-83 plus: **TI83F* > > If it's that easy, thank you.