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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.

	Select *file / new project. Choose create a new project*. Press OK.
	Select *prepare a PROM file*. Press OK.

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

TE USB Suite > PROM file from the bitstream file (XILINX Flash .mcs example) > FWU-iMPACT-03.gif

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

TE USB Suite > PROM file from the bitstream file (XILINX Flash .mcs example) > FWU-iMPACT-04.gif

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;

TE USB Suite > PROM file from the bitstream file (XILINX Flash .mcs example) > FWU-iMPACT-05.gif

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.

Select operations / generate file... or double click generate file... from the iMPACT processes panel.

TE USB Suite > PROM file from the bitstream file (XILINX Flash .mcs example) > FWU-iMPACT-10.gif

You should see the following message in the main panel: generate succeeded.

TE USB Suite > PROM file from the bitstream file (XILINX Flash .mcs example) > FWU-iMPACT-11.gif

You might now want to save your Xilinx iMPACT project settings for future use.

In the folder corresponding to the path you chose as the output file location, you should find the fpga.mcs PROM file.