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wy75: Add default EAROM to avoid hanging at start

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er1400: Device refinements
- Add ability to load default data from region
- Change erase value from all 1s to all 0s
This commit is contained in:
AJR 2019-04-12 17:46:12 -04:00
parent ae147e3e3a
commit 822e3764f2
3 changed files with 22 additions and 7 deletions
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21
src/devices/machine/er1400.cpp
View File

@ -42,6 +42,7 @@ DEFINE_DEVICE_TYPE(ER1400, er1400_device, "er1400", "ER1400 Serial EAROM (100x14
er1400_device::er1400_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
: device_t(mconfig, ER1400, tag, owner, clock)
, device_nvram_interface(mconfig, *this)
, m_default_data(*this, DEVICE_SELF, 100)
, m_clock_input(0)
, m_code_input(0)
, m_data_input(0)
@ -85,8 +86,16 @@ void er1400_device::device_start()
void er1400_device::nvram_default()
{
// all locations erased
std::fill(&m_data_array[0], &m_data_array[100], 0x3fff);
if (m_default_data.found())
{
// obtain default data from memory region
std::copy_n(&m_default_data[0], 100, &m_data_array[0]);
}
else
{
// all locations erased
std::fill_n(&m_data_array[0], 100, 0);
}
}
@ -176,11 +185,11 @@ void er1400_device::write_data()
if (BIT(m_address_register, units))
{
offs_t offset = 10 * (tens - 10) + units;
if ((m_data_array[offset] & ~m_data_register) != 0)
if ((~m_data_array[offset] & m_data_register) != 0)
{
LOG("Writing data at %d (%04X changed to %04X)\n", offset,
m_data_array[offset], m_data_array[offset] & m_data_register);
m_data_array[offset] &= m_data_register;
m_data_array[offset] |= m_data_register;
}
selected++;
}
@ -210,10 +219,10 @@ void er1400_device::erase_data()
if (BIT(m_address_register, units))
{
offs_t offset = 10 * (tens - 10) + units;
if (m_data_array[offset] != 0x3fff)
if (m_data_array[offset] != 0)
{
LOG("Erasing data at %d\n", offset);
m_data_array[offset] = 0x3fff;
m_data_array[offset] = 0;
}
selected++;
}

3
src/devices/machine/er1400.h
View File

@ -66,6 +66,9 @@ private:
void write_data();
void erase_data();
// optional default data
optional_region_ptr<u16> m_default_data;
// nonvolatile data
std::unique_ptr<u16[]> m_data_array;

5
src/mame/drivers/wy50.cpp
View File

@ -326,12 +326,15 @@ ROM_START(wy50)
ROM_LOAD("2201_b.u16", 0x0000, 0x1000, CRC(ee318814) SHA1(0ac64b60ff978e607a087e9e6f4d547811c015c5)) // 2716
ROM_END
ROM_START(wy75) // 8031, green, 101-key detached keyboard, EAROM labeled "MODE 1"
ROM_START(wy75) // 8031, green, 101-key detached keyboard
ROM_REGION(0x2000, "maincpu", 0)
ROM_LOAD("wy75_4001r.bin", 0x0000, 0x2000, CRC(d1e660e0) SHA1(81960e7780b86b9fe338b20d7bd50f7e991020a4))
ROM_REGION(0x1000, "chargen", 0)
ROM_LOAD("wy75_4101a.bin", 0x0000, 0x1000, CRC(96d377db) SHA1(9e059cf067d84267f4e1d92b0509f137fb2ceb19))
ROM_REGION16_LE(0xc8, "earom", 0)
ROM_LOAD("default.bin", 0x00, 0xc8, CRC(0efeff07) SHA1(304e07ef87a4b107700273321a1d4e34a56d6821))
ROM_END
COMP(1984, wy50, 0, 0, wy50, wy50, wy50_state, empty_init, "Wyse Technology", "WY-50 (Rev. E)", MACHINE_IS_SKELETON)