Mercurial > hg > Members > kono > nitros9-code

view lib/alib/strlen.as @ 3140:03b580a02945

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Allow CoCo3FPGA-specific build of superdesc.asm Added new conditional CC3FPGA and code to "level1/modules/superdesc.asm" to reflect changes needed to build the new SD card descriptors for the Coco3FPGA.
author Bill Pierce <merlinious999@gmail.com>
date Sat, 04 Feb 2017 11:06:26 +0100
parents 03f26e88b809
children
line wrap: on
line source

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

* String Length: find length of null terminated string.
*  note:null NOT included in count.

* ENTRY: X=start of string

* EXIT: D=length
*       all other regs (except cc) preserved

 nam Find String Length
 ttl Assembler Library Module


 section .text

STRLEN:
 pshs x
 ldd #-1 comp for inital inc

loop
 addd #1 bump count
 tst ,x+ end?
 bne loop

 puls x,pc

 endsect