09 = PROCESS INFO
   
     ebx pointer to 1024 bytes table
     ecx process number or -1 = who am I
     ret: eax number of processes
          table :  +00  dword   cpu usage
                   +04   word   processes position in windowing stack
                   +06   word   window stack value at ecx
                   +10  12 db   name of the process
                   +22  dword   start of processes memory
                   +26  dword   memory used by process
                   +30  dword   PID of the process
                   +34  dword   window x start
                   +38  dword   window y start
                   +42  dword   window x size
                   +46  dword   window y size
                   +50   word   process slot state
    

You either need to use this system call:

Code:

09 = PROCESS INFO
   
     ebx pointer to 1024 bytes table
     ecx process number or -1 = who am I
     ret: eax number of processes
          table :  +00  dword   cpu usage
                   +04   word   processes position in windowing stack
                   +06   word   window stack value at ecx
                   +10  12 db   name of the process
                   +22  dword   start of processes memory
                   +26  dword   memory used by process
                   +30  dword   PID of the process
                   +34  dword   window x start
                   +38  dword   window y start
                   +42  dword   window x size
                   +46  dword   window y size
                   +50   word   process slot state
    

Or keep track of it in a local variable.
Hope that helps.