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Diffstat (limited to 'src/devices/bus/vtech/memexp/rs232.c')
-rw-r--r--src/devices/bus/vtech/memexp/rs232.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/src/devices/bus/vtech/memexp/rs232.c b/src/devices/bus/vtech/memexp/rs232.c
new file mode 100644
index 00000000000..bd74662c9f5
--- /dev/null
+++ b/src/devices/bus/vtech/memexp/rs232.c
@@ -0,0 +1,104 @@
+// license:GPL-2.0+
+// copyright-holders:Dirk Best
+/***************************************************************************
+
+ Dick Smith VZ-200/300 RS-232 Cartridge
+
+***************************************************************************/
+
+#include "rs232.h"
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type RS232_INTERFACE = &device_creator<rs232_interface_device>;
+
+//-------------------------------------------------
+// rom_region - device-specific ROM region
+//-------------------------------------------------
+
+ROM_START( rs232 )
+ ROM_REGION(0x800, "software", 0)
+ ROM_LOAD("rs232_v15.ic2", 0x000, 0x800, CRC(6545260d) SHA1(4042f6f1e09e383f3c92f628c6187dc5f072fdb2))
+ROM_END
+
+const rom_entry *rs232_interface_device::device_rom_region() const
+{
+ return ROM_NAME( rs232 );
+}
+
+//-------------------------------------------------
+// machine_config_additions - device-specific
+// machine configurations
+//-------------------------------------------------
+
+static MACHINE_CONFIG_FRAGMENT( rs232 )
+ MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, NULL)
+ MCFG_RS232_RXD_HANDLER(WRITELINE(rs232_interface_device, rs232_rx_w))
+MACHINE_CONFIG_END
+
+machine_config_constructor rs232_interface_device::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( rs232 );
+}
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// wordpro_device - constructor
+//-------------------------------------------------
+
+rs232_interface_device::rs232_interface_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, RS232_INTERFACE, "DSE VZ-200/300 RS-232 Interface", tag, owner, clock, "vz_rs232", __FILE__),
+ device_memexp_interface(mconfig, *this),
+ m_rs232(*this, "rs232"),
+ m_rx(1)
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void rs232_interface_device::device_start()
+{
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void rs232_interface_device::device_reset()
+{
+ // program
+ m_slot->m_program->install_rom(0x4000, 0x47ff, 0, 0x800, memregion("software")->base());
+
+ // data
+ m_slot->m_program->install_read_handler(0x5000, 0x57ff, read8_delegate(FUNC(rs232_interface_device::receive_data_r), this));
+ m_slot->m_program->install_write_handler(0x5800, 0x5fff, write8_delegate(FUNC(rs232_interface_device::transmit_data_w), this));
+}
+
+
+//**************************************************************************
+// IMPLEMENTATION
+//**************************************************************************
+
+WRITE_LINE_MEMBER( rs232_interface_device::rs232_rx_w )
+{
+ m_rx = state;
+}
+
+READ8_MEMBER( rs232_interface_device::receive_data_r )
+{
+ return 0x7f | (m_rx << 7);
+}
+
+WRITE8_MEMBER( rs232_interface_device::transmit_data_w )
+{
+ m_rs232->write_txd(!BIT(data, 7));
+}