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Changed a puls PC to rts to save cycles
author David Ladd <drencor-xeen@users.sourceforge.net>
date Sat, 20 Jan 2018 19:32:22 -0600
parents 1647f1874cdf
children
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* Disassembly by Os9disasm of create.r

 section code

* OS-9 system function equates

I$Create equ $83 
I$Open equ $84 
I$Delete equ $87 
I$SetStt equ $8e 
I$Close equ $8f 

creat: ldx   2,s 
 lda   5,s 
 tfr   a,b 
 andb  #$24 
 orb   #$0b 
 os9 I$Create 
 bcc   L005d 
 cmpb  #$da 
 bne   L0039 
 lda   5,s 
 bita  #$80 
 bne   L0039 
 anda  #7 
 ldx   2,s 
 os9 I$Open 
 bcs   L0039 
 pshs  a,u 
 ldx   #0 
 leau  ,x 
 ldb   #2 
 os9 I$SetStt 
 puls  a,u 
 bcc   L005d 
 pshs  b 
 os9 I$Close 
 puls  b 
L0039 lbra  _os9err 
create: ldx   2,s 
 lda   5,s 
 ldb   7,s 
 os9 I$Create 
 bcs   L0039 
 bra   L005d 
L0049 cmpb  #$da 
 bne   L0039 
 os9 I$Delete 
 bcs   L0039 
ocreat: ldx   2,s 
 lda   5,s 
 ldb   7,s 
 os9 I$Create 
 bcs   L0049 
L005d tfr   a,b 
 clra   
 rts    

 endsect