void i8251_device::device_reset()
{
LOG(("I8251: Reset\n"));
/* what is the default setup when the 8251 has been reset??? */
/* i8251 datasheet explains the state of tx pin at reset */
/* tx is set to 1 */
set_out_data_bit(1);
/* assumption, rts is set to 1 */
m_connection_state &= ~SERIAL_STATE_RTS;
serial_connection_out();
transmit_register_reset();
receive_register_reset();
/* expecting mode byte */
m_flags |= I8251_EXPECTING_MODE;
/* not expecting a sync byte */
m_flags &= ~I8251_EXPECTING_SYNC_BYTE;
/* no character to read by cpu */
/* transmitter is ready and is empty */
m_status = I8251_STATUS_TX_EMPTY | I8251_STATUS_TX_READY;
m_mode_byte = 0;
m_command = 0;
/* update tx empty pin output */
update_tx_empty();
/* update rx ready pin output */
update_rx_ready();
/* update tx ready pin output */
update_tx_ready();
}
void i8251_device::device_reset()
{
LOG("I8251: Reset\n");
/* what is the default setup when the 8251 has been reset??? */
/* i8251 datasheet explains the state of tx pin at reset */
/* tx is set to 1 */
m_txd_handler(1);
/* assumption */
m_rts_handler(1);
m_dtr_handler(1);
transmit_register_reset();
receive_register_reset();
m_flags = 0;
/* expecting mode byte */
m_flags |= I8251_EXPECTING_MODE;
/* not expecting a sync byte */
m_flags &= ~I8251_EXPECTING_SYNC_BYTE;
/* no character to read by cpu */
/* transmitter is ready and is empty */
m_status = I8251_STATUS_TX_EMPTY | I8251_STATUS_TX_READY;
m_mode_byte = 0;
m_command = 0;
m_rx_data = 0;
m_tx_data = 0;
m_rxc_count = m_txc_count = 0;
m_br_factor = 1;
/* update tx empty pin output */
update_tx_empty();
/* update rx ready pin output */
update_rx_ready();
/* update tx ready pin output */
update_tx_ready();
}
