Int 14 Fn 16  - Digiboard Digichannel PC/x* - Ccb Command                  [S]

   AH = 16h
   AL = CCB command number (see below)
   BL = byte 2
   BH = byte 3
   CL = byte 1 (for all channel functions except 4Eh and 4Fh)
   DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)

Return: AH = status
       00h successful
       FFh error

See Also: AH=18h"Digiboard"

Values for CCB command number:
 40h   Set Receive Mid Water Mark
 41h   Set Receive High Water Mark
 42h   Flush Receive Buffer
 43h   Flush Transmit Buffer
 44h   Transmit Pause
 45h   Transmit Resume
 46h   Set Interrupt to Host Mask
 47h   Set Baud, Data, Stop and Parity
 48h   Send Break
 49h   Set Modem Lines
 4Ah   Set Break Count
 4Bh   Set Handshake
 4Ch   Set Xon/Xoff Characters
 4Dh   Set Transmit Mid Water Mark
 4Eh   IRQ Polling Timer to Host
 4Fh   Buffer Set All
 50h   Port On
 51h   Port Off
 52h   Receive Pause
 53h   Special Character Interrupt
 54h   RS-422 Enable