From 8ca0d9e13af73dfabca527d373968131fb1ce1c1 Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Tue, 16 May 2023 16:14:37 -0400
Subject: [PATCH] Add a hook for when I think mode latching should occur.

---
 Components/9918/Implementation/ClockConverter.hpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Components/9918/Implementation/ClockConverter.hpp b/Components/9918/Implementation/ClockConverter.hpp
index 344b6fbef..d76746aa7 100644
--- a/Components/9918/Implementation/ClockConverter.hpp
+++ b/Components/9918/Implementation/ClockConverter.hpp
@@ -166,6 +166,10 @@ template <Personality personality> struct LineLayout<personality, std::enable_if
 	constexpr static int TextModeEndOfLeftBorder	= 69;
 	constexpr static int TextModeEndOfPixels		= 309;
 
+	constexpr static int ModeLatchCycle		= 36;	// Just a guess; correlates with the known 144 for the Yamaha VDPs,
+													// and falls into the collection gap between the final sprite
+													// graphics and the initial tiles or pixels.
+
 	/// The number of internal cycles that must elapse between a request to read or write and
 	/// it becoming a candidate for action.
 	constexpr static int VRAMAccessDelay = 6;
@@ -185,6 +189,8 @@ template <Personality personality> struct LineLayout<personality, std::enable_if
 	constexpr static int TextModeEndOfLeftBorder	= 294;
 	constexpr static int TextModeEndOfPixels		= 1254;
 
+	constexpr static int ModeLatchCycle		= 144;
+
 	/// The number of internal cycles that must elapse between a request to read or write and
 	/// it becoming a candidate for action.
 	constexpr static int VRAMAccessDelay = 16;