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pwrview: pit test

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This commit is contained in:
cracyc 2022-01-02 21:54:13 -06:00
parent 76bc4902b8
commit 53d6b930ef
1 changed files with 17 additions and 3 deletions
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20
src/mame/drivers/pwrview.cpp
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@ -286,7 +286,7 @@ u8 pwrview_state::unk3_r(offs_t offset)
m_c280 &= ~0x10;
break;
case 2:
ret = (m_rts ? 0 : 0x40) | (m_dtr ? 0 : 0x80);
ret = (m_rts ? 0 : 0x40) | (m_dtr ? 0 : 0x80) | 0x20;
break;
}
return ret;
@ -298,9 +298,23 @@ void pwrview_state::unk3_w(offs_t offset, u8 data)
{
case 0:
m_c280 = data;
m_pit->set_clockin(0, BIT(data, 5) ? 1000000 : 0);
m_pit->set_clockin(0, BIT(data, 7) ? 1000000 : 0);
m_pit->set_clockin(1, BIT(data, 6) ? 1000000 : 0);
m_pit->set_clockin(2, BIT(data, 7) ? 1000000 : 0);
m_pit->set_clockin(2, BIT(data, 5) ? 1000000 : 0);
if(BIT(data, 2))
{
if(!BIT(data, 6))
m_pit->set_clockin(1, 2000000);
if(!BIT(data, 7))
m_pit->set_clockin(2, 2000000);
}
else
{
if(!BIT(data, 6))
m_pit->set_clockin(1, 0);
if(!BIT(data, 7))
m_pit->set_clockin(2, 0);
}
break;
}
}