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Changed a puls PC to rts to save cycles
author David Ladd <drencor-xeen@users.sourceforge.net>
date Sat, 20 Jan 2018 19:32:22 -0600
parents 03f26e88b809
children
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*****************************************

* See if character in "B" is a alpha letter a..z or A..Z or digit 0..9

* OTHER MODULES NEEDED: IS_ALPHA, IS_DIGIT

* ENTRY: B=character to test

* EXIT: CC zero=1 if alphanumeric, 0 if not


 nam Is Char AlphaNumeric?
 ttl Assembler Library Module


 section .text


IS_ALNUM:
 lbsr IS_ALPHA
 BEQ yes upper/lowercase letters are alphanumeric
 lbsr IS_DIGIT last chance to set flags.

yes
 rts


 endsect