void cdp1852_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
if (!m_read_mode())
{
// input data into register
m_data = m_read_data(0);
// signal processor
set_sr_line(0);
}
else
{
if (m_new_data)
{
m_new_data = 0;
// latch data into register
m_data = m_next_data;
// output data
m_write_data((offs_t)0, m_data);
// signal peripheral device
set_sr_line(1);
m_next_sr = 0;
}
else
{
set_sr_line(m_next_sr);
}
}
}
void cdp1852_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
switch (get_mode())
{
case MODE_INPUT:
// input data into register
m_data = m_in_data_func(0);
// signal processor
set_sr_line(0);
break;
case MODE_OUTPUT:
if (m_new_data)
{
m_new_data = 0;
// latch data into register
m_data = m_next_data;
// output data
m_out_data_func(0, m_data);
// signal peripheral device
set_sr_line(1);
m_next_sr = 0;
}
else
{
set_sr_line(m_next_sr);
}
break;
}
}
void cdp1852_device::device_reset()
{
// reset data register
m_data = 0;
if (!m_read_mode())
{
// reset service request flip-flop
set_sr_line(1);
}
else
{
// output data
m_write_data((offs_t)0, m_data);
// reset service request flip-flop
set_sr_line(0);
}
}
void cdp1852_device::device_reset()
{
// reset data register
m_data = 0;
if (get_mode() == MODE_INPUT)
{
// reset service request flip-flop
set_sr_line(1);
}
else
{
// output data
m_out_data_func(0, m_data);
// reset service request flip-flop
set_sr_line(0);
}
}
static DEVICE_RESET( cdp1852 )
{
cdp1852_t *cdp1852 = get_safe_token(device);
/* reset data register */
cdp1852->data = 0;
if (cdp1852->mode == CDP1852_MODE_INPUT)
{
/* reset service request flip-flop */
set_sr_line(cdp1852, 1);
}
else
{
/* output data */
devcb_call_write8(&cdp1852->out_data_func, 0, cdp1852->data);
/* reset service request flip-flop */
set_sr_line(cdp1852, 0);
}
}
static TIMER_CALLBACK( cdp1852_scan_tick )
{
const device_config *device = (const device_config *)ptr;
cdp1852_t *cdp1852 = get_safe_token(device);
switch (cdp1852->mode)
{
case CDP1852_MODE_INPUT:
/* input data into register */
cdp1852->data = devcb_call_read8(&cdp1852->in_data_func, 0);
/* signal processor */
set_sr_line(cdp1852, 0);
break;
case CDP1852_MODE_OUTPUT:
if (cdp1852->new_data)
{
cdp1852->new_data = 0;
/* latch data into register */
cdp1852->data = cdp1852->next_data;
/* output data */
devcb_call_write8(&cdp1852->out_data_func, 0, cdp1852->data);
/* signal peripheral device */
set_sr_line(cdp1852, 1);
cdp1852->next_sr = 0;
}
else
{
set_sr_line(cdp1852, cdp1852->next_sr);
}
break;
}
}