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Pad: Improve ACK timing

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Fixes random pauses in Moto Racer.
This commit is contained in:
Connor McLaughlin
2020-07-02 00:43:26 +10:00
parent b471d1043a
commit bff5432879
2 changed files with 14 additions and 6 deletions
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7
src/core/pad.h
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@ -92,7 +92,12 @@ private:
bool CanTransfer() const { return m_transmit_buffer_full && m_JOY_CTRL.SELECT && m_JOY_CTRL.TXEN; }
TickCount GetTransferTicks() const { return static_cast<TickCount>(ZeroExtend32(m_JOY_BAUD) * 8); }
TickCount GetACKTicks() const { return 32; }
// From @JaCzekanski
// ACK lasts ~96 ticks or approximately 2.84us at master clock (not implemented).
// ACK delay is between 6.8us-13.7us, or ~338 ticks at master clock for approximately 9.98us.
// Memory card responds faster, approximately 5us or ~170 ticks.
static constexpr TickCount GetACKTicks(bool memory_card) { return memory_card ? 170 : 450; }
void SoftReset();
void UpdateJoyStat();