Int 14 Fn 25  - Hunter 16 - Control Rs232 Drivers                          [S]

   AH = 25h
   AL = new state of RS232 drivers (00h off, 01h on)

Return: nothing

Note:  this function can be used to save power by turning off the RS232
     drivers.  It can also be used to turn on the RS232 drivers before
     connecting to a remote system to avoid "garbage" while the drivers
     turn on.

See Also: AH=23h"HUNTER",AH=24h"HUNTER",AH=26h"HUNTER"