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-rw-r--r--src/devices/bus/rs232/pty.cpp138
1 files changed, 138 insertions, 0 deletions
diff --git a/src/devices/bus/rs232/pty.cpp b/src/devices/bus/rs232/pty.cpp
new file mode 100644
index 00000000000..0039925ac85
--- /dev/null
+++ b/src/devices/bus/rs232/pty.cpp
@@ -0,0 +1,138 @@
+// license:BSD-3-Clause
+// copyright-holders:F. Ulivi
+//
+#include <stdio.h>
+#include "pty.h"
+
+static const int TIMER_POLL = 1;
+
+pseudo_terminal_device::pseudo_terminal_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, PSEUDO_TERMINAL, "Pseudo terminal", tag, owner, clock, "pseudo_terminal", __FILE__),
+ device_serial_interface(mconfig, *this),
+ device_rs232_port_interface(mconfig, *this),
+ device_pty_interface(mconfig, *this),
+ m_rs232_txbaud(*this, "RS232_TXBAUD"),
+ m_rs232_rxbaud(*this, "RS232_RXBAUD"),
+ m_rs232_startbits(*this, "RS232_STARTBITS"),
+ m_rs232_databits(*this, "RS232_DATABITS"),
+ m_rs232_parity(*this, "RS232_PARITY"),
+ m_rs232_stopbits(*this, "RS232_STOPBITS"),
+ m_input_count(0),
+ m_input_index(0)
+{
+}
+
+WRITE_LINE_MEMBER(pseudo_terminal_device::update_serial)
+{
+ int startbits = convert_startbits(m_rs232_startbits->read());
+ int databits = convert_databits(m_rs232_databits->read());
+ parity_t parity = convert_parity(m_rs232_parity->read());
+ stop_bits_t stopbits = convert_stopbits(m_rs232_stopbits->read());
+
+ set_data_frame(startbits, databits, parity, stopbits);
+
+ int txbaud = convert_baud(m_rs232_txbaud->read());
+ set_tra_rate(txbaud);
+
+ int rxbaud = convert_baud(m_rs232_rxbaud->read());
+ set_rcv_rate(rxbaud);
+
+ output_rxd(1);
+
+ // TODO: make this configurable
+ output_dcd(0);
+ output_dsr(0);
+ output_cts(0);
+}
+
+static INPUT_PORTS_START(pseudo_terminal)
+ MCFG_RS232_BAUD("RS232_TXBAUD", RS232_BAUD_9600, "TX Baud", pseudo_terminal_device, update_serial)
+ MCFG_RS232_BAUD("RS232_RXBAUD", RS232_BAUD_9600, "RX Baud", pseudo_terminal_device, update_serial)
+ MCFG_RS232_STARTBITS("RS232_STARTBITS", RS232_STARTBITS_1, "Start Bits", pseudo_terminal_device, update_serial)
+ MCFG_RS232_DATABITS("RS232_DATABITS", RS232_DATABITS_8, "Data Bits", pseudo_terminal_device, update_serial)
+ MCFG_RS232_PARITY("RS232_PARITY", RS232_PARITY_NONE, "Parity", pseudo_terminal_device, update_serial)
+ MCFG_RS232_STOPBITS("RS232_STOPBITS", RS232_STOPBITS_1, "Stop Bits", pseudo_terminal_device, update_serial)
+INPUT_PORTS_END
+
+ioport_constructor pseudo_terminal_device::device_input_ports() const
+{
+ return INPUT_PORTS_NAME(pseudo_terminal);
+}
+
+void pseudo_terminal_device::device_start()
+{
+ m_timer_poll = timer_alloc(TIMER_POLL);
+
+ open();
+}
+
+void pseudo_terminal_device::device_stop()
+{
+ close();
+}
+
+void pseudo_terminal_device::device_reset()
+{
+ update_serial(0);
+ queue();
+}
+
+void pseudo_terminal_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
+{
+ switch (id)
+ {
+ case TIMER_POLL:
+ queue();
+ break;
+
+ default:
+ device_serial_interface::device_timer(timer, id, param, ptr);
+ }
+}
+
+void pseudo_terminal_device::tra_callback()
+{
+ output_rxd(transmit_register_get_data_bit());
+}
+
+void pseudo_terminal_device::tra_complete()
+{
+ queue();
+}
+
+void pseudo_terminal_device::rcv_complete()
+{
+ receive_register_extract();
+ write(get_received_char());
+}
+
+void pseudo_terminal_device::queue(void)
+{
+ if (is_transmit_register_empty())
+ {
+ if (m_input_index == m_input_count)
+ {
+ m_input_index = 0;
+ int tmp = read(m_input_buffer , sizeof(m_input_buffer));
+ if (tmp > 0) {
+ m_input_count = tmp;
+ } else {
+ m_input_count = 0;
+ }
+ }
+
+ if (m_input_count != 0)
+ {
+ transmit_register_setup(m_input_buffer[ m_input_index++ ]);
+
+ m_timer_poll->adjust(attotime::never);
+ }
+ else
+ {
+ int txbaud = convert_baud(m_rs232_txbaud->read());
+ m_timer_poll->adjust(attotime::from_hz(txbaud));
+ }
+ }
+}
+
+const device_type PSEUDO_TERMINAL = &device_creator<pseudo_terminal_device>;