Royce Simmons <PICLIST@mitvma.mit.edu> wrote:

> I am looking for a ASCII to HEX conversion assembler routine.  I need
> to convert 2 ASCII characters to a single hex digit.

Royce:

Enter with your two ASCII characters in CHAR1 (tens' digit) and CHAR2
(ones' digit).  Exits with CHAR1 and the CHAR2 modified, and the hex
value in W.

    LIST R = DEC

    MOVLW   '0'
    BTFSC   CHAR1,6
    MOVLW   'A'-10
    SUBWF   CHAR1

    MOVLW   '0'
    BTFSC   CHAR2,6
    MOVLW   'A'-10
    SUBWF   CHAR2

    SWAPF   CHAR1,W
    ADDWF   CHAR2,W

-Andy

=== Andrew Warren -- aiw@cypress.com
=== Principal Design Engineer
=== Cypress Semiconductor Corporation
===
=== Opinions expressed above do not
=== necessarily represent those of
=== Cypress Semiconductor Corporation

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