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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 uppercase letter

* OTHER MODULES NEEDED: none

* ENTRY: B=character to test

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

 nam Is Char Uppercase?
 ttl Assembler Library Module


 psect IS_UPPER,0,0,0,0,0


IS_UPPER:
 cmpb #'A 
 blo no not uppercase, zero cleared
 cmpb #'Z if equal, zero set
 bhi no not upperc, zero cleared
 orcc #%00000100 set zero

no
 rts

 endsect