Int FD

AH = function (also see separate entries below)

Program: TFPCX is an interface between modem and terminal program for packet- radio communications

InstallCheck:
Test for the string "N5NX" three bytes beyond the interrupt handler

Range:
INT FD is the default, but may be changed, so the full installation check consists of scanning for the signature

Note: TFPCX returns AX=FFFFh on any unsupported function call

See Also: AH=01h - AH=03h - AH=FEh

Category: Serial I/O - Int FDh - T