view lib/alib/to_lower.as @ 3149:afd0f7d9b514

Add the Sleuth multipass disassembler from Bud Pass Added new directory "3rdparty/utiles/sleuth3" and source files to build "sleuth3" and its utilities. Also added "sleuth3" to the Directories section of "3rdparty/utils/makefile" to faciliate the inclusion of the sleuth3 build.
author Bill Pierce <merlinious999@gmail.com>
date Sat, 04 Feb 2017 18:55:39 +0100
parents 03f26e88b809
children
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* Convert character in "B" to lowercase

* OTHER MODULES NEEDED: IS_UPPER

* ENTRY: B=ascii value of character to convert

* EXIT: B=ascii value of character in lowercase

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


 nam Convert Char to Lowercase
 ttl Assembler Library Module


 section .text

TO_LOWER:
 pshs cc
 lbsr IS_UPPER only uppercase can be converted
 bne tolox no upper, exit
 addb #$20 make lowercase

tolox
 puls cc,pc

 endsect