diff options
Diffstat (limited to 'src/devices/bus/archimedes/podule/serial.cpp')
-rw-r--r-- | src/devices/bus/archimedes/podule/serial.cpp | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/src/devices/bus/archimedes/podule/serial.cpp b/src/devices/bus/archimedes/podule/serial.cpp new file mode 100644 index 00000000000..ba8f132043d --- /dev/null +++ b/src/devices/bus/archimedes/podule/serial.cpp @@ -0,0 +1,156 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/********************************************************************** + + Atomwide Serial Expansion Card + + http://chrisacorns.computinghistory.org.uk/32bit_UpgradesA2G/Atomwide_SerialExp.html + +**********************************************************************/ + +#include "emu.h" +#include "serial.h" +#include "machine/ins8250.h" +#include "bus/rs232/rs232.h" + + +namespace { + +// ======================> arc_serial_device + +class arc_serial_device : + public device_t, + public device_archimedes_podule_interface +{ +public: + // construction/destruction + arc_serial_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); + +protected: + // device-level overrides + virtual void device_start() override ATTR_COLD; + virtual void device_reset() override ATTR_COLD; + + // optional information overrides + virtual void device_add_mconfig(machine_config &config) override ATTR_COLD; + virtual const tiny_rom_entry *device_rom_region() const override ATTR_COLD; + + // device_archimedes_podule_interface overrides + virtual void ioc_map(address_map &map) override ATTR_COLD; + +private: + required_memory_region m_podule_rom; + + u8 m_rom_page; +}; + + +void arc_serial_device::ioc_map(address_map &map) +{ + map(0x0000, 0x1fff).lr8(NAME([this](offs_t offset) { return m_podule_rom->base()[offset | ((m_rom_page << 11) & 0xf800)]; })).umask32(0x000000ff); + map(0x2000, 0x201f).rw("uart2", FUNC(ns16550_device::ins8250_r), FUNC(ns16550_device::ins8250_w)).umask32(0x000000ff); + map(0x2400, 0x241f).rw("uart1", FUNC(ns16550_device::ins8250_r), FUNC(ns16550_device::ins8250_w)).umask32(0x000000ff); + map(0x2800, 0x281f).rw("uart0", FUNC(ns16550_device::ins8250_r), FUNC(ns16550_device::ins8250_w)).umask32(0x000000ff); + map(0x3c00, 0x3c00).lw8(NAME([this](u8 data) { m_rom_page = data; })); +} + + +//------------------------------------------------- +// ROM( serial ) +//------------------------------------------------- + +ROM_START( serial ) + ROM_REGION(0x10000, "podule_rom", 0) + ROM_LOAD("atomwide_serial.rom", 0x0000, 0x10000, CRC(2dcf3b28) SHA1(c100cc4f5e3d87233e6db6a1da04ac7c19ac2357)) +ROM_END + +const tiny_rom_entry *arc_serial_device::device_rom_region() const +{ + return ROM_NAME( serial ); +} + + +//------------------------------------------------- +// device_add_mconfig - add device configuration +//------------------------------------------------- + +void arc_serial_device::device_add_mconfig(machine_config &config) +{ + ns16550_device &uart0(NS16550(config, "uart0", 7.3728_MHz_XTAL)); + uart0.out_tx_callback().set("serial0", FUNC(rs232_port_device::write_txd)); + uart0.out_dtr_callback().set("serial0", FUNC(rs232_port_device::write_dtr)); + uart0.out_rts_callback().set("serial0", FUNC(rs232_port_device::write_rts)); + + rs232_port_device &serial0(RS232_PORT(config, "serial0", default_rs232_devices, nullptr)); + serial0.rxd_handler().set("uart0", FUNC(ns16550_device::rx_w)); + serial0.dcd_handler().set("uart0", FUNC(ns16550_device::dcd_w)); + serial0.dsr_handler().set("uart0", FUNC(ns16550_device::dsr_w)); + serial0.cts_handler().set("uart0", FUNC(ns16550_device::cts_w)); + + ns16550_device &uart1(NS16550(config, "uart1", 7.3728_MHz_XTAL)); + uart1.out_tx_callback().set("serial1", FUNC(rs232_port_device::write_txd)); + uart1.out_dtr_callback().set("serial1", FUNC(rs232_port_device::write_dtr)); + uart1.out_rts_callback().set("serial1", FUNC(rs232_port_device::write_rts)); + + rs232_port_device &serial1(RS232_PORT(config, "serial1", default_rs232_devices, nullptr)); + serial1.rxd_handler().set("uart1", FUNC(ns16550_device::rx_w)); + serial1.dcd_handler().set("uart1", FUNC(ns16550_device::dcd_w)); + serial1.dsr_handler().set("uart1", FUNC(ns16550_device::dsr_w)); + serial1.cts_handler().set("uart1", FUNC(ns16550_device::cts_w)); + + ns16550_device &uart2(NS16550(config, "uart2", 7.3728_MHz_XTAL)); + uart2.out_tx_callback().set("serial2", FUNC(rs232_port_device::write_txd)); + uart2.out_dtr_callback().set("serial2", FUNC(rs232_port_device::write_dtr)); + uart2.out_rts_callback().set("serial2", FUNC(rs232_port_device::write_rts)); + + rs232_port_device &serial2(RS232_PORT(config, "serial2", default_rs232_devices, nullptr)); + serial2.rxd_handler().set("uart2", FUNC(ns16550_device::rx_w)); + serial2.dcd_handler().set("uart2", FUNC(ns16550_device::dcd_w)); + serial2.dsr_handler().set("uart2", FUNC(ns16550_device::dsr_w)); + serial2.cts_handler().set("uart2", FUNC(ns16550_device::cts_w)); +} + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// arc_serial_device - constructor +//------------------------------------------------- + +arc_serial_device::arc_serial_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : device_t(mconfig, ARC_SERIAL, tag, owner, clock) + , device_archimedes_podule_interface(mconfig, *this) + , m_podule_rom(*this, "podule_rom") + , m_rom_page(0) +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void arc_serial_device::device_start() +{ + save_item(NAME(m_rom_page)); +} + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void arc_serial_device::device_reset() +{ + m_rom_page = 0x00; +} + +} // anonymous namespace + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +DEFINE_DEVICE_TYPE_PRIVATE(ARC_SERIAL, device_archimedes_podule_interface, arc_serial_device, "arc_serial", "Atomwide Serial Expansion Card") |