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makefile: Allow PORTS with level1/2 mix https://sourceforge.net/p/nitros9/feature-requests/10/
author Tormod Volden <debian.tormod@gmail.com>
date Tue, 19 Apr 2022 18:12:17 +0200
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