diff --git a/Machines/AmstradCPC/AmstradCPC.cpp b/Machines/AmstradCPC/AmstradCPC.cpp
index 3cdd37139..d58273fbe 100644
--- a/Machines/AmstradCPC/AmstradCPC.cpp
+++ b/Machines/AmstradCPC/AmstradCPC.cpp
@@ -774,11 +774,11 @@ class ConcreteMachine:
 		}
 
 		HalfCycles get_typer_delay() {
-			return Cycles(4000000);
+			return Cycles(4000000);	// Wait 1 second before typing.
 		}
 
 		HalfCycles get_typer_frequency() {
-			return Cycles(80000);
+			return Cycles(80000);	// Type one character per frame.
 		}
 
 		// See header; sets a key as either pressed or released.