diff options
Diffstat (limited to 'src/devices/bus/vtech/memexp/rs232.cpp')
-rw-r--r-- | src/devices/bus/vtech/memexp/rs232.cpp | 50 |
1 files changed, 26 insertions, 24 deletions
diff --git a/src/devices/bus/vtech/memexp/rs232.cpp b/src/devices/bus/vtech/memexp/rs232.cpp index cf21b7ee006..cf07b2055d6 100644 --- a/src/devices/bus/vtech/memexp/rs232.cpp +++ b/src/devices/bus/vtech/memexp/rs232.cpp @@ -17,12 +17,28 @@ DEFINE_DEVICE_TYPE(VTECH_RS232_INTERFACE, vtech_rs232_interface_device, "vtech_rs232", "DSE VZ-200/300 RS-232 Interface") //------------------------------------------------- +// mem_map - memory space address map +//------------------------------------------------- + +void vtech_rs232_interface_device::mem_map(address_map &map) +{ + map.unmap_value_high(); + map(0x4000, 0x47ff).rom().region("software", 0); + map(0x5000, 0x5000).mirror(0x7ff).r(FUNC(vtech_rs232_interface_device::receive_data_r)); + map(0x5800, 0x5800).mirror(0x7ff).w(FUNC(vtech_rs232_interface_device::transmit_data_w)); +} + +//------------------------------------------------- // 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_DEFAULT_BIOS("16") + ROM_SYSTEM_BIOS(0, "15", "Version 1.5") // 1985 + ROMX_LOAD("rs232_v15.ic2", 0x000, 0x800, CRC(6545260d) SHA1(4042f6f1e09e383f3c92f628c6187dc5f072fdb2), ROM_BIOS(0)) + ROM_SYSTEM_BIOS(1, "16", "Version 1.6") // 1987 + ROMX_LOAD("rs232_v16.ic2", 0x000, 0x800, CRC(d761fc79) SHA1(28e00c7ff33143a948308330859bee54b474e114), ROM_BIOS(1)) ROM_END const tiny_rom_entry *vtech_rs232_interface_device::device_rom_region() const @@ -36,8 +52,10 @@ const tiny_rom_entry *vtech_rs232_interface_device::device_rom_region() const void vtech_rs232_interface_device::device_add_mconfig(machine_config &config) { + vtech_memexp_device::device_add_mconfig(config); + RS232_PORT(config, m_rs232, default_rs232_devices, nullptr); - m_rs232->rxd_handler().set(FUNC(vtech_rs232_interface_device::rs232_rx_w)); + m_rs232->rxd_handler().set([this](int state) { m_rx = state; }); } @@ -50,8 +68,7 @@ void vtech_rs232_interface_device::device_add_mconfig(machine_config &config) //------------------------------------------------- vtech_rs232_interface_device::vtech_rs232_interface_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : - device_t(mconfig, VTECH_RS232_INTERFACE, tag, owner, clock), - device_vtech_memexp_interface(mconfig, *this), + vtech_memexp_device(mconfig, VTECH_RS232_INTERFACE, tag, owner, clock), m_rs232(*this, "rs232"), m_rx(1) { @@ -63,20 +80,10 @@ vtech_rs232_interface_device::vtech_rs232_interface_device(const machine_config void vtech_rs232_interface_device::device_start() { -} - -//------------------------------------------------- -// device_reset - device-specific reset -//------------------------------------------------- - -void vtech_rs232_interface_device::device_reset() -{ - // program - program_space().install_rom(0x4000, 0x47ff, 0x800, memregion("software")->base()); + vtech_memexp_device::device_start(); - // data - program_space().install_read_handler(0x5000, 0x57ff, read8_delegate(FUNC(vtech_rs232_interface_device::receive_data_r), this)); - program_space().install_write_handler(0x5800, 0x5fff, write8_delegate(FUNC(vtech_rs232_interface_device::transmit_data_w), this)); + // register for save states + save_item(NAME(m_rx)); } @@ -84,17 +91,12 @@ void vtech_rs232_interface_device::device_reset() // IMPLEMENTATION //************************************************************************** -WRITE_LINE_MEMBER( vtech_rs232_interface_device::rs232_rx_w ) -{ - m_rx = state; -} - -READ8_MEMBER( vtech_rs232_interface_device::receive_data_r ) +uint8_t vtech_rs232_interface_device::receive_data_r() { return 0x7f | (m_rx << 7); } -WRITE8_MEMBER( vtech_rs232_interface_device::transmit_data_w ) +void vtech_rs232_interface_device::transmit_data_w(uint8_t data) { m_rs232->write_txd(!BIT(data, 7)); } |