diff --git a/example-config.toml b/example-config.toml
index 15133fc..f7fb8d6 100644
--- a/example-config.toml
+++ b/example-config.toml
@@ -31,22 +31,22 @@ ip = "dhcp" # Can also be e.g. "192.168.0.123"
 strict = true # allows some wacky configurations, like panels that overlap.
 
 [[display.strings]]
-position = { x = 64, y = 0 }
+position = { x = 0, y = 0 }
 dimensions = { length = 256, height = 64 }
-rotation = "UPDOWN"
+rotation = "R90"
 [[display.strings]]
 position = { x = 65, y = 0 }
 dimensions = { length = 256, height = 64 }
-rotation = "LEFTRIGHT"
+rotation = "R0"
 [[display.strings]]
 position = { x = 65, y = 65 }
 dimensions = { length = 256, height = 64 }
-rotation = "LEFTRIGHT"
+rotation = "R0"
 [[display.strings]]
 position = { x = 65, y = 130 }
 dimensions = { length = 256, height = 64 }
-rotation = "LEFTRIGHT"
+rotation = "R0"
 [[display.strings]]
 position = { x = 65, y = 195 }
 dimensions = { length = 256, height = 64 }
-rotation = "LEFTRIGHT"
+rotation = "R0"
diff --git a/src/groovylight/main.py b/src/groovylight/main.py
index 4a4a0f2..3fb41e1 100644
--- a/src/groovylight/main.py
+++ b/src/groovylight/main.py
@@ -3,6 +3,7 @@
 import logging
 import argparse
 from groovylight.config import Config
+from groovylight.platforms.cxxrtl_sim import emit_cxxrtl
 
 logger = logging.getLogger(__loader__.name)
 
@@ -54,7 +55,12 @@ def main():
     setup_logger(args)
 
     conf = Config(args.config)
-    print(conf)
+
+    # use the config to create the module.
+
+    if conf.conf["hardware"]["type"] == "cxxrtl":
+        logger.info("Generating CXXRTL based graphical simulator.")
+        emit_cxxrtl(conf)
 
 
 
diff --git a/src/groovylight/platforms/cxxrtl_sim.py b/src/groovylight/platforms/cxxrtl_sim.py
index 2efd6e8..e4cfe0f 100644
--- a/src/groovylight/platforms/cxxrtl_sim.py
+++ b/src/groovylight/platforms/cxxrtl_sim.py
@@ -7,3 +7,14 @@
 # black box the UDP streaming.
 # provide code for display outputs to render onto SDL2 canvas.
 # compile code (optionally)
+from amaranth.back import cxxrtl
+from amaranth import Module
+
+
+
+def emit_cxxrtl(config):
+    m = Module()
+
+    cxxrtl.convert(m)
+
+
diff --git a/src/groovylight/top.py b/src/groovylight/top.py
new file mode 100644
index 0000000..93e418d
--- /dev/null
+++ b/src/groovylight/top.py
@@ -0,0 +1,9 @@
+# Creates a top-level module based on the display configuration.
+
+
+from amaranth import Signal
+from amaranth.lib import wiring, data
+
+from .hub75
+
+