piclist 2001\01\29\231451a >
Thread: Code Challenge: Range check and convert Hex
face BY : Nikolai Golovchenko email (remove spam text)

Three instructions less:

   movlw   -'0'
   btfsc   temp, 6
    movlw  -'A'+10
   addwf   temp, w    ;w = 0:F if hex valid
   andlw 0xF0
    goto Bad          ;leave with unmodified temp
   movlw   -'0'       ;repeat the stuff
   btfsc   temp, 6
    movlw  -'A'+10
   addwf   temp, f    ;temp is converted hex

If ascii conversion is in a routine, that would save another


---- Original Message ----
From: j newton <spameplus1spam_OUTspamspamSAN.RR.COM>
Sent: Monday, January 29, 2001 23:52:16
 To: @spam@PICLISTspam_OUTspamspam_OUTMITVMA.MIT.EDU
Subj: [PIC:] Code Challenge: Range check and convert Hex

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Subject (change) Code Challenge: Range check and convert Hex

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