First public commit.

lenser/vic20/exporter.py

@@ -0,0 +1,18 @@
+"""Build a Commodore VIC-20 autostart cartridge (.a0) from a conversion."""
+from __future__ import annotations
+
+import os
+
+from .viewer import assemble
+
+_EXTS = (".a0", ".crt", ".bin", ".rom")
+
+
+def export_a0(conv, output_path, source_path=None, display="forever",
+              seconds=0, video="ntsc"):
+    if not output_path.lower().endswith(_EXTS):
+        output_path += ".a0"
+    rom = assemble.build_cart(conv.data)
+    with open(output_path, "wb") as f:
+        f.write(rom)
+    return output_path