RAMSDClose
RAMSDClose Close RAM I/O drivers
#include <Serial.h> Serial Drivers
void RAMSDClose(whichPort );
SPortSel whichPort ; sPortA=modem port; sPortB=printer port
returns Error Code; 0=no error
Apple no longer recommends the use of RAMSDOpen. Instead, use
OpenDriver. See About the Serial Drivers for more information.
RAMSDClose closes the RAM input and output drivers for either a printer
port or a modem port. It should only be used on machines with 64K ROMs.
whichPort is the parameter that identifies the port as being either the modem
port or the printer port.
Returns: none

Notes: We are warned that a RAM Serial Driver must be closed with
RAMSDClose before your application ends.