1=INICOM
2=SETCOM
3=SETQUE
4=RECCOM
5=SNDCOM
6=CTX
7=TRMCOM
8=STACOM
9=CEXTFCN
10=CFLUSH
11=CEVT
12=CEVTGET
13=CSETBRK
14=CCLRBRK
15=GETDCB
16=WEP
19=COMMWRITESTRING
20=READCOMMSTRING
100=ENABLENOTIFICATION