Int 2F Fn F003  U - 4map - Insert Character Into ???                       [K]

   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

See Also: AX=F000h,AX=F002h