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Z80: Tidy the M1 activation sequence a little (start moving towards ZX Spectrum memory contention model)

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Signed-off-by: Adrian Conlon <adrian.conlon@gmail.com>
This commit is contained in:
Adrian Conlon 2021-01-02 11:04:38 +00:00
parent e0e137415f
commit 4ec462e79a
1 changed files with 2 additions and 1 deletions
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3
Z80/src/Z80.cpp
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@ -69,6 +69,8 @@ uint8_t EightBit::Z80::memoryRead() {
public:
_Reader(Z80& parent) : m_parent(parent) {
m_parent.ReadingMemory.fire(EventArgs::empty());
if (lowered(m_parent.M1()))
m_parent.tick();
m_parent.tick(2);
m_parent.lowerMREQ();
}
@ -750,7 +752,6 @@ void EightBit::Z80::fetchDisplacement() {
// CPU.The HALT acknowledge signal is active during this time indicating that the processor
// is in the HALT state
uint8_t EightBit::Z80::fetchOpCode() {
tick();
uint8_t returned;
{
_ActivateM1 m1(*this);