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am9513: Implement time-of-day mode

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This commit is contained in:
AJR 2017-10-06 13:24:54 -04:00
parent 4c4adc4dd4
commit 6e30c05c88
2 changed files with 121 additions and 16 deletions
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136
src/devices/machine/am9513.cpp
View File

@ -289,7 +289,7 @@ void am9513_device::set_master_mode(u16 data)
u16 old_mmr = m_mmr;
m_mmr = data;
// Time-of-Day options (TODO: not implemented yet)
// Time-of-Day options
if ((m_mmr & 0x0003) != (old_mmr & 0x0003))
{
switch (m_mmr & 0x0003)
@ -372,6 +372,23 @@ bool am9513_device::counter_is_mode_x(int c) const
}
//-------------------------------------------------
// compare_count - determine comparator output
// for Counter 1 or Counter 2
//-------------------------------------------------
bool am9513_device::compare_count(int c) const
{
assert(c == 0 || c == 1);
// TOD special case: Comparator 2 does 32-bit comparison when Comparator 1 is also activated
if (c == 1 && BIT(m_mmr, 2) && (m_mmr & 0x0003) != 0)
return m_count[0] == m_alarm[0] && m_count[1] == m_alarm[1];
else
return m_count[c] == m_alarm[c];
}
//-------------------------------------------------
// set_counter_mode - handle counter mode changes
//-------------------------------------------------
@ -454,7 +471,7 @@ void am9513_device::set_counter_mode(int c, u16 data)
case 0x0001:
if (c < 2 && BIT(m_mmr, c + 2))
set_output(c, m_count[c] == m_alarm[c]);
set_output(c, compare_count(c));
else
{
LOGMASKED(LOG_MODE, "Counter %d: Output active high TC pulse\n", c + 1);
@ -464,7 +481,7 @@ void am9513_device::set_counter_mode(int c, u16 data)
case 0x0005:
if (c < 2 && BIT(m_mmr, c + 2))
set_output(c, m_count[c] != m_alarm[c]);
set_output(c, !compare_count(c));
else
{
LOGMASKED(LOG_MODE, "Counter %d: Output active low TC pulse\n", c + 1);
@ -475,7 +492,7 @@ void am9513_device::set_counter_mode(int c, u16 data)
case 0x0002:
case 0x0003: // SCP-300F sets this up; why?
if (c < 2 && BIT(m_mmr, c + 2))
set_output(c, m_count[c] == m_alarm[c]);
set_output(c, compare_count(c));
else
{
LOGMASKED(LOG_MODE, "Counter %d: Output toggle on TC\n", c + 1);
@ -717,12 +734,51 @@ void am9513_device::step_counter(int c, bool force_load)
{
if ((m_count[c] & 0x000f) >= 0x000a)
m_count[c] += 0x0006;
if ((m_count[c] & 0x00f0) >= 0x00a0)
m_count[c] += 0x0060;
if (c == 0 && (m_mmr & 0x0003) == 0x0001)
{
// TOD: 50Hz
if ((m_count[c] & 0x00f0) >= 0x0050)
m_count[c] += 0x00b0;
}
else if (c == 0 && (m_mmr & 0x0003) == 0x0002)
{
// TOD: 60Hz
if ((m_count[c] & 0x00f0) >= 0x0060)
m_count[c] += 0x00a0;
}
else if (c == 1 && (m_mmr & 0x0003) != 0)
{
// TOD: minutes
if ((m_count[c] & 0x00f0) >= 0x0060)
m_count[c] += 0x00a0;
}
else
{
if ((m_count[c] & 0x00f0) >= 0x00a0)
m_count[c] += 0x0060;
}
if ((m_count[c] & 0x0f00) >= 0x0a00)
m_count[c] += 0x0600;
if ((m_count[c] & 0xf000) >= 0xa000)
m_count[c] += 0x6000;
if (c == 0 && (m_mmr & 0x0003) != 0)
{
// TOD: seconds
if ((m_count[c] & 0xf000) >= 0x6000)
m_count[c] += 0xa000;
}
else if (c == 1 && (m_mmr & 0x0003) != 0)
{
// TOD: hours
if ((m_count[c] & 0xff00) >= 0x2400)
m_count[c] += 0xdc00;
}
else
{
if ((m_count[c] & 0xf000) >= 0xa000)
m_count[c] += 0x6000;
}
}
}
else
@ -735,12 +791,51 @@ void am9513_device::step_counter(int c, bool force_load)
{
if ((m_count[c] & 0x000f) >= 0x000a)
m_count[c] -= 0x0006;
if ((m_count[c] & 0x00f0) >= 0x00a0)
m_count[c] -= 0x0060;
if (c == 0 && (m_mmr & 0x0003) == 0x0001)
{
// TOD: 50Hz
if ((m_count[c] & 0x00f0) >= 0x0050)
m_count[c] -= 0x00b0;
}
else if (c == 0 && (m_mmr & 0x0003) == 0x0002)
{
// TOD: 60Hz
if ((m_count[c] & 0x00f0) >= 0x0060)
m_count[c] -= 0x00a0;
}
else if (c == 1 && (m_mmr & 0x0003) != 0)
{
// TOD: minutes
if ((m_count[c] & 0x00f0) >= 0x0060)
m_count[c] -= 0x00a0;
}
else
{
if ((m_count[c] & 0x00f0) >= 0x00a0)
m_count[c] -= 0x0060;
}
if ((m_count[c] & 0x0f00) >= 0x0a00)
m_count[c] -= 0x0600;
if ((m_count[c] & 0xf000) >= 0xa000)
m_count[c] -= 0x6000;
if (c == 0 && (m_mmr & 0x0003) != 0)
{
// TOD: seconds
if ((m_count[c] & 0xf000) >= 0x6000)
m_count[c] -= 0xa000;
}
else if (c == 1 && (m_mmr & 0x0003) != 0)
{
// TOD: hours
if ((m_count[c] & 0xff00) >= 0x2400)
m_count[c] -= 0xdc00;
}
else
{
if ((m_count[c] & 0xf000) >= 0xa000)
m_count[c] -= 0x6000;
}
}
}
@ -781,10 +876,19 @@ void am9513_device::step_counter(int c, bool force_load)
// Active comparators
if (c < 2 && BIT(m_mmr, c + 2))
{
if (BIT(m_counter_mode[c], 2))
set_output(c, m_count[c] == m_alarm[c]);
else
set_output(c, m_count[c] != m_alarm[c]);
switch (m_counter_mode[c] & 0x0007)
{
case 0x0001:
case 0x0002:
// Active high comparator output
set_output(c, compare_count(c));
break;
case 0x0005:
// Active low comparator output
set_output(c, !compare_count(c));
break;
}
}
}

1
src/devices/machine/am9513.h
View File

@ -120,6 +120,7 @@ private:
void select_freq_timer(int f, int c, bool selected, bool cycle);
void set_master_mode(u16 data);
bool counter_is_mode_x(int c) const;
bool compare_count(int c) const;
void set_counter_mode(int c, u16 data);
void arm_counter(int c);
void disarm_counter(int c);