Added information on how to copy the linux image to flash card.

fpga/README.md

@@ -14,6 +14,12 @@ wallypipelinedsoc.sv and the 4 IP blocks.  The FPGA include and ILA (In logic
 analyzer) which provides the current instruction PCM, instrM, etc along with
 a large number of debuging signals.
 
+* Programming the flash card
+You'll need to write the linux image to the flash card.  Use the convert2bin.py 
+script in wally-pipelined/linux-testgen/linux-testvectors/ to convert the ram.txt
+file from QEMU's preload to generate the binary.  Then to copy
+ sudo dd if=ram.bin of=<path to flash card>.
+
 * Loading the FPGA
 
 After the build process is complete about 2 hrs on an i9-7900x. Launch vivado's

wally-pipelined/linux-testgen/linux-testvectors/convert2bin.py

@@ -0,0 +1,13 @@
+#!/usr/bin/python3
+
+asciiBinFile = 'ram.txt'
+binFile = 'ram.bin'
+
+asciiBinFP = open(asciiBinFile, 'r')
+binFP = open (binFile, 'wb')
+
+for line in asciiBinFP.readlines():
+    binFP.write(int(line, 16).to_bytes(8, byteorder='little', signed=False))
+
+asciiBinFP.close()
+binFP.close()