PROM file from the bitstream file (XILINX Flash .mcs example)

In order to generate a .mcs PROM file from the bitstream file download.bit, start Xilinx iMPACT. The following example shows the case of Xilinx iMPACT 11.3 (for other version the procedure doesn't change):

Select "file / new project".

Choose "create a new project".

Press "OK".

Select "prepare a PROM file".

Press "OK".

New iMPACT Project

Select step 1. "storage target / Xilinx Flash/PROM" of the left panel and press the left green arrow.

PROM File Formatter Step1

Select step 2. "add storage device(s) / auto select PROM" of the middle panel and press the right green arrow.

In step 3. "enter data" of the right panel

PROM File Formatter Step 3

Type fpga (or another name) in the "Output File Name" input field

Using OpenFut or OpenFutNet, there is no longer any restriction in the name of output file: any name for the output file name input field is allowed.
With the old 2^nd generation program FWU any other name than fpga for the output file name input field is not allowed.

Choose a suitable path for the "Output File Location" input field;

Select mcs from the drop-down menu file format in the flash/PROM file property sub-panel;

Prom File Formatter Step 3, MCS selection

Press the "OK" button in the bottom left corner of the current window.

	Just acknowledge the pup-up message.
	Browse to the "./implementation/" folder of your "." project folder and select the bitstream file download.bit. Press the *"open"* button in the bottom left corner of the current window.
	Your design likely consist of just one device file. So deny the request by pressing the *"NO*" button.
	Just acknowledge the pup-up message.