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fix cmos i/o

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This commit is contained in:
hap 2015-10-31 00:23:23 +01:00
parent c7cf9ee627
commit 2c899f31ac
1 changed files with 21 additions and 15 deletions
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36
src/devices/cpu/hmcs40/hmcs40.c
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@ -178,14 +178,14 @@ void hmcs40_cpu_device::device_start()
reset_prescaler(); reset_prescaler();
// resolve callbacks // resolve callbacks
m_read_r0.resolve_safe(0); m_read_r0.resolve_safe(m_polarity & 0xf);
m_read_r1.resolve_safe(0); m_read_r1.resolve_safe(m_polarity & 0xf);
m_read_r2.resolve_safe(0); m_read_r2.resolve_safe(m_polarity & 0xf);
m_read_r3.resolve_safe(0); m_read_r3.resolve_safe(m_polarity & 0xf);
m_read_r4.resolve_safe(0); m_read_r4.resolve_safe(m_polarity & 0xf);
m_read_r5.resolve_safe(0); m_read_r5.resolve_safe(m_polarity & 0xf);
m_read_r6.resolve_safe(0); m_read_r6.resolve_safe(m_polarity & 0xf);
m_read_r7.resolve_safe(0); m_read_r7.resolve_safe(m_polarity & 0xf);
m_write_r0.resolve_safe(); m_write_r0.resolve_safe();
m_write_r1.resolve_safe(); m_write_r1.resolve_safe();
@ -196,7 +196,7 @@ void hmcs40_cpu_device::device_start()
m_write_r6.resolve_safe(); m_write_r6.resolve_safe();
m_write_r7.resolve_safe(); m_write_r7.resolve_safe();
m_read_d.resolve_safe(0); m_read_d.resolve_safe(m_polarity);
m_write_d.resolve_safe(); m_write_d.resolve_safe();
// zerofill // zerofill
@ -293,10 +293,10 @@ void hmcs40_cpu_device::device_reset()
// clear i/o // clear i/o
m_d = m_polarity; m_d = m_polarity;
for (int i = 0; i < 16; i++) for (int i = 0; i < 16; i++)
hmcs40_cpu_device::write_d(i, 0); hmcs40_cpu_device::write_d(i, m_polarity);
for (int i = 0; i < 8; i++) for (int i = 0; i < 8; i++)
hmcs40_cpu_device::write_r(i, 0); hmcs40_cpu_device::write_r(i, m_polarity & 0xf);
} }
@ -322,13 +322,16 @@ UINT8 hmcs40_cpu_device::read_r(int index)
case 7: inp = m_read_r7(index, 0xff); break; case 7: inp = m_read_r7(index, 0xff); break;
} }
return ((inp ^ m_polarity) | m_r[index]) & 0xf; if (m_polarity)
return (inp & m_r[index]) & 0xf;
else
return (inp | m_r[index]) & 0xf;
} }
void hmcs40_cpu_device::write_r(int index, UINT8 data) void hmcs40_cpu_device::write_r(int index, UINT8 data)
{ {
index &= 7; index &= 7;
data = (data ^ m_polarity) & 0xf; data &= 0xf;
m_r[index] = data; m_r[index] = data;
switch (index) switch (index)
@ -348,13 +351,16 @@ int hmcs40_cpu_device::read_d(int index)
{ {
index &= 15; index &= 15;
return ((m_read_d(index, 0xffff) ^ m_polarity) | m_d) >> index & 1; if (m_polarity)
return (m_read_d(index, 0xffff) & m_d) >> index & 1;
else
return (m_read_d(index, 0xffff) | m_d) >> index & 1;
} }
void hmcs40_cpu_device::write_d(int index, int state) void hmcs40_cpu_device::write_d(int index, int state)
{ {
index &= 15; index &= 15;
state = (((state) ? 1 : 0) ^ m_polarity) & 1; state = (state) ? 1 : 0;
m_d = (m_d & ~(1 << index)) | state << index; m_d = (m_d & ~(1 << index)) | state << index;
m_write_d(index, m_d, 0xffff); m_write_d(index, m_d, 0xffff);