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in LC3 assembly code, what is difference between TRAPx23 IN and TRAPx20 GETC? I know both...

in LC3 assembly code,

what is difference between TRAPx23 IN and TRAPx20 GETC? I know both are read one character form keyboard but how work differently?

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Answer #1

Answer:------------

Difference between TRAPx23 IN and TRAPx20 GETC :-------------------

TRAPx23 IN:--------------

  • Print a prompt to the monitor and read a single character
    from Keyboard.
  • Write ASCII code to R0[7:0], clear R0[15:8], echo character
    to the monitor.

TRAPx20 GETC :--------------

  • Read a single character from Keyboard.
  • Write ASCII code to R0[7:0], clear R0[15:8]
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