LDA C08C,X

["Bryan Parkoff" <BParkoff@satx.rr.com>]

    Please explain what LDA C08C,X is.  I know that it is read mode into
byte latch.  Please look below:

C65E: BD 8C C0 LDA C08C,X

C661: 10 FB BPL C65E {-05}

C663: 49 D5 EOR #D5

    It requires to loop until bit is high.  Does it mean that it has to loop
8 times until 8 bits are filled in a byte latch?  Is it possible to add "STA
4000" between LDA and BPL so I can see one bit out of 8 bits into one byte
storage?  Why do EOR #D5 have to be used instead of CMP like AA and 96.
    I do have Beneath Apple DOS/ProDOS manual in front of me, but it does
not provide me enough information.  It is why I am asking a question in
newsgroups so someone might be able to provide more information.  I
appreciate this.



--
Yours Truly,

Bryan Parkoff
BParkoff@satx.rr.com