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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 1647f1874cdf
children
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* Disassembly by Os9disasm of atoi.r

 section code

atoi: pshs  u 
 ldu   4,s 
 clra   
 clrb   
 pshs  d 
 pshs  b 
L000a ldb   ,u+ 
 cmpb  #$20 
 beq   L000a 
 cmpb  #9 
 beq   L000a 
 cmpb  #$2d 
 bne   L001c 
 stb   ,s 
 bra   L0037 
L001c cmpb  #$2b 
 bne   L0039 
 bra   L0037 
L0022 ldd   1,s 
 lslb   
 rola   
 lslb   
 rola   
 addd  1,s 
 lslb   
 rola   
 pshs  d 
 ldb   -1,u 
 clra   
 subb  #$30 
 addd  ,s++ 
 std   1,s 
L0037 ldb   ,u+ 
L0039 cmpb  #$30 
 bcs   L0041 
 cmpb  #$39 
 bls   L0022 
L0041 tst   ,s+ 
 puls  d 
 beq   L004b 
 nega   
 negb   
 sbca  #0 
L004b puls  u,pc 

 endsect