diff --git a/Components/9918/Implementation/9918.cpp b/Components/9918/Implementation/9918.cpp
index 09d475f84..44c5f44fc 100644
--- a/Components/9918/Implementation/9918.cpp
+++ b/Components/9918/Implementation/9918.cpp
@@ -915,6 +915,11 @@ void Base<personality>::commit_register(int reg, uint8_t value) {
 					case 0b1111:	break;	// TODO: hmmc.
 				}
 
+				// Seed timing information if a command was found.
+				if(Storage<personality>::command_) {
+					// TODO.
+				}
+
 				// TODO: record logical mode.
 			break;
 		}
diff --git a/Components/9918/Implementation/YamahaCommands.hpp b/Components/9918/Implementation/YamahaCommands.hpp
index 2b469f878..e67f8b31c 100644
--- a/Components/9918/Implementation/YamahaCommands.hpp
+++ b/Components/9918/Implementation/YamahaCommands.hpp
@@ -52,11 +52,20 @@ struct Command {
 namespace Commands {
 
 struct Line: public Command {
-	using Command::Command;
+	public:
+		Line(CommandContext &context) : Command(context) {
+			// Set up Bresenham constants.
+		}
 
-	bool next() {
-		return false;
-	}
+		bool next() {
+			// Should implement Bresenham with cadence:
+			//
+			//	88 cycles before the next read; 24 to write.
+			//	Add 32 extra cycles if a minor-axis step occurs.
+			return false;
+		}
+
+	private:
 };
 
 }