* Disassembly by Os9disasm of mem.r

* OS-9 system function equates

F$Mem equ $07 

 section bss

* Uninitialized data (class B)
_spare: rmb 2 
* Initialized Data (class G)

 endsect  

 section code

sbrk: ldd   memend,y 
 pshs  d 
 ldd   4,s 
 cmpd  _spare,y 
 bcs   L0035 
 pshs  y 
 clra   
 clrb   
 os9 F$Mem 
 addd  6,s 
 os9 F$Mem 
 tfr   y,d 
 puls  y 
 bcc   L0027 
 ldd   #-1 
 leas  2,s 
 rts    
L0027 std   memend,y 
 addd  _spare,y 
 subd  ,s 
 std   _spare,y 
L0035 leas  2,s 
 ldd   _spare,y 
 pshs  d 
 subd  4,s 
 std   _spare,y 
 ldd   memend,y 
 subd  ,s++ 
 pshs  d 
 clra   
 ldx   ,s 
L004e sta   ,x+ 
 cmpx  memend,y 
 bcs   L004e 
 puls  d,pc 
ibrk: ldd   2,s 
 addd  _mtop,y 
 bcs   L0081 
 cmpd  _stbot,y 
 bcc   L0081 
 pshs  d 
 ldx   _mtop,y 
 clra   
L006e cmpx  ,s 
 bcc   L0076 
 sta   ,x+ 
 bra   L006e 
L0076 ldd   _mtop,y 
 puls  x 
 stx   _mtop,y 
 rts    
L0081 ldd   #-1 
 rts    
unbrk: ldd   2,s 
 pshs  y 
 os9 F$Mem 
 bcc   L0093 
 ldd   #-1 
 puls  y,pc 
L0093 tfr   y,d 
 puls  y 
 std   memend,y 
 clra   
 clrb   
 std   _spare,y 
 rts    

 endsect