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hd6301: instead of skip, zerofill nvram when no battery save

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hap 2024-01-25 21:33:46 +01:00
parent 1d51167965
commit 5cf0ba72d5
1 changed files with 29 additions and 27 deletions
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56
src/devices/cpu/m6800/m6801.cpp
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@ -1571,28 +1571,27 @@ bool hd6301_cpu_device::nvram_write(util::write_stream &file)
if (!m6801_cpu_device::nvram_write(file)) if (!m6801_cpu_device::nvram_write(file))
return false; return false;
// skip if it's currently not battery-backed size_t actual;
if (m_nvram_battery) std::vector<uint8_t> buf(7);
{
size_t actual;
uint8_t buf[7];
// misc registers // misc registers
buf[0] = m_s.b.h; buf[0] = m_s.b.h;
buf[1] = m_s.b.l; buf[1] = m_s.b.l;
buf[2] = m_x.b.h; buf[2] = m_x.b.h;
buf[3] = m_x.b.l; buf[3] = m_x.b.l;
buf[4] = m_d.b.h; buf[4] = m_d.b.h;
buf[5] = m_d.b.l; buf[5] = m_d.b.l;
buf[6] = m_tdr; buf[6] = m_tdr;
if (file.write(&buf, sizeof(buf), actual) || (sizeof(buf) != actual)) // port output latches
return false; buf.insert(buf.end(), m_port_data, m_port_data + sizeof(m_port_data));
// port output latches // zerofill if it's currently not battery-backed
if (file.write(&m_port_data[0], sizeof(m_port_data), actual) || sizeof(m_port_data) != actual) if (!m_nvram_battery)
return false; std::fill(buf.begin(), buf.end(), 0);
}
if (file.write(buf.data(), buf.size(), actual) || (buf.size() != actual))
return false;
return true; return true;
} }
@ -1602,15 +1601,18 @@ bool hd6301x_cpu_device::nvram_write(util::write_stream &file)
if (!hd6301_cpu_device::nvram_write(file)) if (!hd6301_cpu_device::nvram_write(file))
return false; return false;
// skip if it's currently not battery-backed size_t actual;
if (m_nvram_battery) std::vector<uint8_t> buf;
{
size_t actual;
// port output latches // port output latches
if (file.write(&m_portx_data[0], sizeof(m_portx_data), actual) || sizeof(m_portx_data) != actual) buf.insert(buf.begin(), m_portx_data, m_portx_data + sizeof(m_portx_data));
return false;
} // zerofill if it's currently not battery-backed
if (!m_nvram_battery)
std::fill(buf.begin(), buf.end(), 0);
if (file.write(buf.data(), buf.size(), actual) || (buf.size() != actual))
return false;
return true; return true;
} }