INT 2F U - 4MAP - INSERT CHARACTER INTO ???                                     
	AX = F003h
	BL = character to insert
Return: AX = status
	    0000h successful
	    0001h buffer full
Program: 4MAP is a keybinding program for 4DOS (see AX=D44Dh) by Ho-Ping Tseng
SeeAlso: AX=F000h,AX=F002h