Mercurial > hg > Members > kono > nitros9-code

view lib/alib/to_upper.a @ 2626:cff23b8fc512

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
DriveWire routines for Atari SIO
author Boisy Pitre <boisy.pitre@nuance.com>
date Sat, 25 Feb 2012 18:21:54 -0600
parents 7d70b7e1cb21
children aaba193af04f
line wrap: on
line source

***************************************************

* 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


 psect TO_UPPER,0,0,0,0,0

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