hi leo;
if i have understood correctly then you
want to store the internal ram contents in xram so that the variables used in program are not affetcted. if that is true then my correction takes care of that.i am backing up iram data in register b and then restoring it.ofcourse u may backup r0 in xram
but that should not need a ram page as you mentioned.if i haven't uderstood you well then please explain that for my and everybody's benefit.
reagrds
pranav