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Add a hook for when I think mode latching should occur.

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Thomas Harte 2023-05-16 16:14:37 -04:00
parent 3014c957e7
commit 8ca0d9e13a
1 changed files with 6 additions and 0 deletions
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6
Components/9918/Implementation/ClockConverter.hpp
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@ -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;