view lib/alib/parsnstr.as @ 3141:717ced83b885

coco3: Build SD card device descriptors for CoCo3FPGA Added "CC3FPGAFLAGS = $(AFLAGS) -DCC3FPGA=1 $(FLAGS)" to "level2/coco3/modules/makefile" for flagging Coco3FPGA specific features in modules sources. Added "llcoco3fpga", "ddsd0_coco3fpga", "sd0_coco3fpga", and "sd1_coco3fpga" to the "coco3/modules/makefile" - RBF section, which also now adds all to the "NITROS9/MODULES/RBF" on all disk images for building new Coco3FPGA disks from NitrOS9. Added new descriptor section to the "level2/coco3/modules/makefile" reflecting the new Coco3FPGA SD card descriptors and their flags.
author Bill Pierce <merlinious999@gmail.com>
date Sat, 04 Feb 2017 11:06:28 +0100
parents 03f26e88b809
children
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* Parse sign bit terminated string to convert it to a
* null terminated string. Note: if X and Y are the same
* the existing string will be overwritten -- don't do this
* with psects...

* OTHER MODULES NEEDED: none
 
* ENTRY: X=start of sign bit terminated string
*        Y=buffer for null terminated string

* EXIT: D=string size (not including null)
*       All other regs (except cc) preserved


 nam Parse sign-bit terminated string
 ttl Assembler Library Module


 section .text


PARSNSTR:
 pshs x
 lbsr STRHCPY copy string
 tfr y,x point to moved string
 lbsr STRHLEN find length of string
 pshs d size
 leax d,x
 lda ,-x get final byte
 anda #%01111111 clear sign bit
 clrb add null terminator
 std ,x  
 puls d,x,pc


 endsect