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Added ClrScrn and CapsLock functionality for Atari VTIO
author Boisy Pitre <boisy.pitre@nuance.com>
date Mon, 10 Dec 2012 16:27:38 -0600
parents 7d70b7e1cb21
children aaba193af04f
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*****************************************

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

* OTHER MODULES NEEDED: IS_LOWER, IS_UPPER

* ENTRY: B=character to test

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

 nam Is Char Alphabetic?
 ttl Assembler Library Module


 psect IS_ALPHA,0,0,0,0,0


IS_ALPHA:
 lbsr IS_UPPER
 BEQ yes uppercase letters are alpha
 lbsr IS_LOWER last chance to set flags.

yes
 rts


 endsect