INT 21 U - Novell NetWare - "HoldFileModeSet" (obsolete) AH = B7h AL = new value for HoldFileFlag Return: AL = previous value of HoldFileFlag Note: this function provided backward compatibility with a bug in early DOS versions and CP/M(Control Program for Microcomputers) An early operating system for micros based on the 8-bit Intel 8080 CPU (and later the compatible 8085 and Zilog Z80 CPUs). MSDOS version 1.0 was essentially a clone of CP/M for the Intel 8086., but is no longer used or supported