As stated above, the ROM preprocessor converts the preprocessor language into FHDL ROM specifications. One uses the ROM by calling it just as if it were an ordinary circuit. The name of the ROM is given by the label on the "rom" statement. To create microcode you must supply both the ROM specifications and the ROM sequencer specifications. The ROM preprocessor provides no microcode sequencing hardware, you must provide all sequencer hardware in FHDL. In addition you must provide a microinstruction register, and route the control signals from this register to the appropriate points in your design.