INTERFACING WITH 8255

Discussion in 'Embedded Systems and Microcontrollers' started by speeed_777, Oct 12, 2008.

  1. speeed_777

    Thread Starter Active Member

    Oct 5, 2008
    54
    0
    I have the program for interfacing of lcd with 8085,in gaonkar 556 page no. but i don't know how to hex code for it as given that "mesage" db.what's this?
    replay fastttttttttttttttttttttttttt
     
  2. Papabravo

    Expert

    Feb 24, 2006
    10,137
    1,786
    'db' is the pseudo-operation code for define byte. Most assemblers will take a comma separated list and assemble that many bytes into memory.

    Similarly 'dw' is for define word and there may be others that assemble lonmger blocks of constant data including 'ascii' and 'asciz' which are strings with and without null terminators.
     
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