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mm74c922: clock da pin after updating data outputs [Robbbert]

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This commit is contained in:
hap 2025-01-10 13:38:43 +01:00
parent 2298fa1c34
commit 9f0182d043
1 changed files with 7 additions and 7 deletions
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14
src/devices/machine/mm74c922.cpp
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@ -23,7 +23,6 @@ DEFINE_DEVICE_TYPE(MM74C923, mm74c923_device, "mm74c923", "MM74C923 20-Key Encod
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
@ -111,6 +110,13 @@ uint8_t mm74c922_device::read()
void mm74c922_device::change_output_lines()
{
// clock data latches
if (m_next_data != m_data)
{
m_data = m_next_data;
}
// clock data available
if (m_next_da != m_da)
{
m_da = m_next_da;
@ -120,12 +126,6 @@ void mm74c922_device::change_output_lines()
// active high output
m_write_da(m_da ? 1 : 0);
}
// clock data latches
if (m_next_data != m_data)
{
m_data = m_next_data;
}
}