From 4f7478b8c1dc588fa58295658f1376365d333b0f Mon Sep 17 00:00:00 2001
From: Makise Kurisu <kurisu@shimatta.de>
Date: Fri, 29 Apr 2016 20:38:30 +0200
Subject: [PATCH] Added doc

---
 README.md | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/README.md b/README.md
index 7ae2ae9..861012f 100644
--- a/README.md
+++ b/README.md
@@ -2,3 +2,30 @@ model-ghdl
 ==========
 
 A wrapper for GHDL to make it look like Mentor's ModelSim. Helpful for use with programs like Sigasi.
+
+
+VCOM
+----
+### Original commands
+* -work <top>: Set top level
+* -workdir <dir>: Set working directory
+* -87, -93, -93c, -2000, -2002, -2008: Set VHDL version
+
+### Additional commands
+* -ghdl <param>: Supply these arguments directly to GHDL (can be used multiple times)
+
+### Notes
+* cwd is expected to be the compile directory
+
+
+VSIM
+----
+### Original commands
+* -gui work.toplevel(RTL): Set toplevel and work library
+
+### Additional commands
+* -ghdl <param>: Supply these arguments directly to GHDL (can be used multiple times)
+* -gtkwprefix: Prefix for the .gtkw save file. Path will be $cwd/$prefix$toplevel.gtkw
+
+### Notes
+* cwd is expected to be the source directory (used for .gtkw save path)