XCE Instruction Question

["Bryan Parkoff" <nospam@nospam.com>]

    You may be surprised that 65816 manual claims to say high byte of 
Accumulator Register should never be zero while X Index Register and Y Index 
Register should always be zero during emulation mode.  I tested myself on 
Apple IIgs.  I discovered that after I switch from emulation mode to native 
mode, high byte of Accumulator Register is lost.
    If you use XBA instruction, high byte of Accumulator Register is always 
preserved in special memory location like temporal register, but it is never 
stored in high byte of Accumulator Register.
    Please verify to make sure it is correct if I am wrong.

Bryan Parkoff