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am9513: Counters 1 and 5 are indeed treated as adjacent (nw)

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This commit is contained in:
AJR 2017-10-06 20:21:23 -04:00
parent ffc5b2c3b6
commit da89d9ee5b
1 changed files with 23 additions and 20 deletions
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43
src/devices/machine/am9513.cpp
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@ -620,16 +620,16 @@ void am9513_device::set_tc(int c, bool state)
}
}
if (c < 4)
{
// TC cascading
if ((m_counter_mode[c + 1] & 0x1f00) == (state ? 0x0000 : 0x1000))
count_edge(c + 1);
// TCn-1 = TC5 for Counter 1
int d = (c + 1) % 5;
// TC gating
if ((m_counter_mode[c + 1] & 0xe000) == 0x2000)
gate_count(c + 1, state && (bus_is_16_bit() || m_gate_alt[c + 1]));
}
// TC cascading
if ((m_counter_mode[d] & 0x1f00) == (state ? 0x0000 : 0x1000))
count_edge(d);
// TC gating
if ((m_counter_mode[d] & 0xe000) == 0x2000)
gate_count(d, state && (bus_is_16_bit() || m_gate_alt[d]));
}
@ -947,20 +947,26 @@ void am9513_device::write_gate(int g, bool level)
m_gate[g] = level;
// Check for selection of GATE n as source for any counter
for (int c = 0; c < 5; c++)
{
if ((m_counter_mode[c] & 0x0f00) >> 8 == (g + 6) && BIT(m_counter_mode[c], 12) == !level)
count_edge(c);
}
// Check for selection of GATE n as control for same-numbered counter
if (BIT(m_counter_mode[g], 15))
gate_count(g, level && (bus_is_16_bit() || m_gate_alt[g]));
if (g > 0 && (m_counter_mode[g - 1] & 0xe000) == 0x4000)
gate_count(g - 1, level && (bus_is_16_bit() || m_gate_alt[g - 1]));
if (g < 4 && (m_counter_mode[g + 1] & 0xe000) == 0x6000)
gate_count(g + 1, level && (bus_is_16_bit() || m_gate_alt[g + 1]));
// FOUT Source = GATE n
// Check for selection of GATE n as control for previous counter
if ((m_counter_mode[(g + 4) % 5] & 0xe000) == 0x4000)
gate_count((g + 4) % 5, level && (bus_is_16_bit() || m_gate_alt[(g + 4) % 5]));
// Check for selection of GATE n as control for next counter
if ((m_counter_mode[(g + 1) % 5] & 0xe000) == 0x6000)
gate_count((g + 1) % 5, level && (bus_is_16_bit() || m_gate_alt[(g + 1) % 5]));
// Check for selection of GATE n as source for FOUT
if ((m_mmr & 0x00f0) >> 4 == (g + 6))
fout_tick();
}
@ -984,18 +990,15 @@ void am9513_device::write_gate_alt(int c, bool level)
switch (m_counter_mode[c] & 0xe000)
{
case 0x2000:
if (c > 0)
gate_count(c, level && m_tc[c - 1]);
gate_count(c, level && m_tc[(c + 4) % 5]);
break;
case 0x4000:
if (c < 4)
gate_count(c + 1, level && m_gate[c + 1]);
gate_count((c + 1) % 5, level && m_gate[(c + 1) % 5]);
break;
case 0x6000:
if (c > 0)
gate_count(c - 1, level && m_gate[c - 1]);
gate_count((c + 4) % 5, level && m_gate[(c + 4) % 5]);
break;
case 0x8000: