void mm5740_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
int ako = 0;
for (int x = 0; x < 9; x++)
{
uint16_t data = m_read_x[x]() ^ 0x3ff;
if ((data ^ m_x_mask[x]) == 0)
{
// bail early if nothing has changed.
continue;
}
for (int y = 0; y < 10; y++)
{
if (BIT(data, y))
{
uint8_t *rom = m_rom->base();
uint16_t offset = x*10 + y;
// Common portion
uint16_t common = (uint16_t) rom[offset];
offset += (((m_read_shift() ? 1: 0) + (m_read_control() ? 2: 0)) + 1) * 90;
// Unique portion based on shift/ctrl keys.
uint8_t uniq = rom[offset];
uint16_t b = (((common & 0x10) << 4) | ((uniq & 0x0f) << 4) | (common & 0x0f)) ^ 0x1ff;
ako = 1;
if (!BIT(m_x_mask[x], y))
{
m_x_mask[x] |= (1 << y);
if (m_b != b)
{
m_b = b;
m_write_data_ready(ASSERT_LINE);
return;
}
}
}
else // key released, unmark it from the "down" info
{
m_x_mask[x] &= ~(1 << y);
}
}
}
if (!ako)
{
m_write_data_ready(CLEAR_LINE);
m_b = -1;
}
}
UINT16 ay3600_device::b_r()
{
UINT16 data = m_b;
m_write_data_ready(0);
return data;
}
void ay3600_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
int ako = 0;
for (int x = 0; x < 9; x++)
{
UINT16 data = 0;
switch(x)
{
case 0: data = m_read_x0(); break;
case 1: data = m_read_x1(); break;
case 2: data = m_read_x2(); break;
case 3: data = m_read_x3(); break;
case 4: data = m_read_x4(); break;
case 5: data = m_read_x5(); break;
case 6: data = m_read_x6(); break;
case 7: data = m_read_x7(); break;
case 8: data = m_read_x8(); break;
}
for (int y = 0; y < 10; y++)
{
int b = (x * 10) + y;
if (b > 63)
{
b -= 64;
b = 0x100 | b;
}
b |= (m_read_shift() << 6);
b |= (m_read_control() << 7);
if (BIT(data, y))
{
if (!(m_x_mask[x] & (1 << y)))
{
ako = 1;
m_x_mask[x] |= (1 << y);
if (m_b != b)
{
m_b = b;
m_write_data_ready(1);
return;
}
}
}
else // key released, unmark it from the "down" info
{
m_x_mask[x] &= ~(1 << y);
}
}
}
if (!ako)
{
m_b = -1;
}
if (ako != m_ako)
{
m_write_ako(ako);
m_ako = ako;
}
}
uint16_t mm5740_device::b_r()
{
m_write_data_ready(CLEAR_LINE);
return m_b;
}
void ay3600_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
int ako = 0;
for (int x = 0; x < 9; x++)
{
UINT16 data = 0;
switch(x)
{
case 0: data = m_read_x0(); break;
case 1: data = m_read_x1(); break;
case 2: data = m_read_x2(); break;
case 3: data = m_read_x3(); break;
case 4: data = m_read_x4(); break;
case 5: data = m_read_x5(); break;
case 6: data = m_read_x6(); break;
case 7: data = m_read_x7(); break;
case 8: data = m_read_x8(); break;
}
for (int y = 0; y < 10; y++)
{
int b = (x * 10) + y;
if (b > 63)
{
b -= 64;
b = 0x100 | b;
}
b |= (m_read_shift() << 6);
b |= (m_read_control() << 7);
if (BIT(data, y))
{
bool found = false;
// is this key already down?
for (int k = 0; k < MAX_KEYS_DOWN; k++)
{
if (b == m_keys_down[k])
{
found = true;
break;
}
}
if (!found)
{
ako = 1;
if (m_b != b)
{
m_b = b;
m_write_data_ready(1);
return;
}
// add to the keys down list
for (int k = 0; k < MAX_KEYS_DOWN; k++)
{
if (m_keys_down[k] == -1)
{
m_keys_down[k] = b;
break;
}
}
}
}
else // key released, unmark it from the keys_down table
{
for (int k = 0; k < MAX_KEYS_DOWN; k++)
{
if (b == m_keys_down[k])
{
m_keys_down[k] = -1;
}
}
}
}
}
if (!ako)
{
m_b = -1;
}
if (ako != m_ako)
{
m_write_ako(ako);
m_ako = ako;
}
}
