view lib/alib/to_upper.as @ 2831:7c8442122235 lwtools-port

fix level 1 builds
author lfantoniosi
date Tue, 18 Jun 2013 21:41:46 -0400
parents 03f26e88b809
children
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* Convert character in "B" to uppercase

* OTHER MODULES NEEDED: IS_LOWER

* ENTRY: B=ascii value of character to convert

* EXIT: B=ascii value of character in uppercase

* Note: control codes, etc. are not effected.


 nam Convert Char to Uppercase
 ttl Assembler Library Module


 section .text

TO_UPPER:
 pshs cc
 lbsr IS_LOWER only lowercase can be converted to upper
 bne toupx
 subb #$20 make uppercase

toupx
 puls cc,pc

 endsect