Int 16 Fn 7F  - PCanywhere Iii - Set Keyboard/screen Mode                  [R]

   AH = 7Fh
   AL = subfunction
       00h enable remote keyboard only
       01h enable host keyboard only
       02h enable both keyboards
       08h display top 24 lines
       09h display bottom 24 lines
       10h Hayes modem
       11h other modem
       12h direct connect