// license:GPL-2.0+ // copyright-holders:Dirk Best /*************************************************************************** VTech Laser/VZ Printer Interface VTech PI 20 Dick Smith Electronics X-7320 ***************************************************************************/ #include "emu.h" #include "printer.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(VTECH_PRINTER_INTERFACE, vtech_printer_interface_device, "vtech_printer", "Laser/VZ Printer Interface") //------------------------------------------------- // io_map - memory space address map //------------------------------------------------- void vtech_printer_interface_device::io_map(address_map &map) { map.unmap_value_high(); map(0x00, 0x00).r(FUNC(vtech_printer_interface_device::busy_r)); map(0x0d, 0x0d).w(FUNC(vtech_printer_interface_device::strobe_w)); map(0x0e, 0x0e).w(m_latch, FUNC(output_latch_device::write)); } //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- void vtech_printer_interface_device::device_add_mconfig(machine_config &config) { vtech_ioexp_device::device_add_mconfig(config); CENTRONICS(config, m_centronics, centronics_devices, "printer"); m_centronics->busy_handler().set(FUNC(vtech_printer_interface_device::busy_w)); OUTPUT_LATCH(config, m_latch); m_centronics->set_output_latch(*m_latch); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // vtech_printer_interface_device - constructor //------------------------------------------------- vtech_printer_interface_device::vtech_printer_interface_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : vtech_ioexp_device(mconfig, VTECH_PRINTER_INTERFACE, tag, owner, clock), m_centronics(*this, "centronics"), m_latch(*this, "latch"), m_centronics_busy(0) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void vtech_printer_interface_device::device_start() { vtech_ioexp_device::device_start(); // register for save states save_item(NAME(m_centronics_busy)); } //************************************************************************** // IMPLEMENTATION //************************************************************************** void vtech_printer_interface_device::busy_w(int state) { m_centronics_busy = state; } uint8_t vtech_printer_interface_device::busy_r() { return 0xfe | m_centronics_busy; } void vtech_printer_interface_device::strobe_w(uint8_t data) { m_centronics->write_strobe(1); m_centronics->write_strobe(0); }