Added more tests

Extracted common 400x behavior like timing and latching into common module
Added maxed MCS-4

src/components/common/mod.rs

@@ -0,0 +1,6 @@
+//! Common functionality for Intel 400x series chips
+
+pub mod intel_400x;
+
+// Re-export commonly used items for convenience
+pub use intel_400x::*;