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apple2: TransWarp needs to stay at 1 MHz if software told it to (nw)

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This commit is contained in:
arbee 2019-12-16 07:42:31 -05:00
parent f6ee4fb096
commit 8d393c5e7f
2 changed files with 17 additions and 7 deletions
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23
src/devices/bus/a2bus/transwarp.cpp
View File

@ -187,15 +187,22 @@ void a2bus_transwarp_device::device_reset()
void a2bus_transwarp_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
if (!(m_dsw2->read() & 0x80))
if (m_bIn1MHzMode)
{
if (m_dsw1->read() & 0x80)
m_ourcpu->set_unscaled_clock(1021800);
}
else
{
if (!(m_dsw2->read() & 0x80))
{
m_ourcpu->set_unscaled_clock(A2BUS_7M_CLOCK / 4);
}
else
{
m_ourcpu->set_unscaled_clock(A2BUS_7M_CLOCK / 2);
if (m_dsw1->read() & 0x80)
{
m_ourcpu->set_unscaled_clock(A2BUS_7M_CLOCK / 4);
}
else
{
m_ourcpu->set_unscaled_clock(A2BUS_7M_CLOCK / 2);
}
}
}
m_timer->adjust(attotime::never);
@ -250,10 +257,12 @@ WRITE8_MEMBER( a2bus_transwarp_device::dma_w )
{
m_ourcpu->set_unscaled_clock(A2BUS_7M_CLOCK / 2);
}
m_bIn1MHzMode = false;
}
else if (data == 1)
{
m_ourcpu->set_unscaled_clock(1021800);
m_bIn1MHzMode = true;
}
else if (data == 3)
{

1
src/devices/bus/a2bus/transwarp.h
View File

@ -42,6 +42,7 @@ protected:
private:
bool m_bEnabled;
bool m_bReadA2ROM;
bool m_bIn1MHzMode;
emu_timer *m_timer;
required_device<cpu_device> m_ourcpu;