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diff --git a/HDL_workflow.mdwn b/HDL_workflow.mdwn
index 94db5b6c29eeafc65b0173ad2719c1b092c1b9d1..0c325e016e7af3e61a3c43e79a5770e0d088c911 100644 (file)
--- a/HDL_workflow.mdwn
+++ b/HDL_workflow.mdwn
@@ -47,6 +47,8 @@ Whilst many resources online advocate "sudo" in front of all root-level commands
 * apt-get install graphviz xdot gtkwave
 * return to user prompt (ctrl-d)
 
+This will get you python3 and other tools that are needed. graphviz is essential fir showing the interconnections between cells, and gtkwave is essential for debugging.
+
 ## yosys
 
 Follow the source code (git clone) instructions here: <http://www.clifford.at/yosys/download.html>