Implement readline and readword for VIC-20

docs/stdlib/vic20.md

@@ -0,0 +1,21 @@
+[< back to index](../doc_index.md)
+
+# VIC-20-oriented modules
+
+## vic20_kernal module
+
+The `vic20_kernal` module is imported automatically on the VIC-20 target.
+It provides access to Kernal routines.
+
+TODO
+
+## vic20_basic module
+
+The `vic20_basic` module provides access to Basic routines.
+It is imported automatically on all PRG VIC-20 targets (`vic20`, `vic20_3k`, `vic20_8k`), but not on cartridge targets (like `vic20_a000`).
+
+TODO
+
+## vic20_hardware
+
+TODO