Int 2F Fn F000  U - 4map - Installation Check                              [K]

   AX = F000h

Return: AX = 00FFh
Program: 4MAP is a keybinding program for 4DOS (see AX=D44Dh) by Ho-Ping Tseng

Note:  returns AX=00FFh for any value of AL not listed here

See Also: AX=D44Dh,AX=F001h,AX=F002h