// license:BSD-3-Clause // copyright-holders:AJR /******************************************************************************* Skeleton driver for Yamaha PSR-40 PortaSound keyboard. *******************************************************************************/ #include "emu.h" #include "cpu/z80/z80.h" #include "machine/i8255.h" #include "machine/nvram.h" namespace { class yamaha_psr40_state : public driver_device { public: yamaha_psr40_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") { } void psr40(machine_config &config); private: void mem_map(address_map &map); required_device m_maincpu; }; void yamaha_psr40_state::mem_map(address_map &map) { map(0x0000, 0x7fff).rom().region("program", 0); map(0x8000, 0x87ff).mirror(0x1800).ram().share("nvram"); //map(0xa000, 0xa01f).mirror(0x1fe0).rw("ge7", FUNC(ig10771_device::read), FUNC(ig10771_device::write)); map(0xa01e, 0xa01f).nopr(); map(0xc000, 0xc003).mirror(0x1ffc).rw("ppi", FUNC(i8255_device::read), FUNC(i8255_device::write)); } static INPUT_PORTS_START(psr40) INPUT_PORTS_END void yamaha_psr40_state::psr40(machine_config &config) { Z80(config, m_maincpu, 4'000'000); // unknown clock m_maincpu->set_addrmap(AS_PROGRAM, &yamaha_psr40_state::mem_map); NVRAM(config, "nvram", nvram_device::DEFAULT_ALL_0); // TC5517APL + battery? I8255(config, "ppi"); } ROM_START(psr40) ROM_REGION(0x8000, "program", 0) ROM_LOAD("yamaha_xa004a0_6133-7836.ic4", 0x0000, 0x8000, CRC(7ac4a729) SHA1(e792aabe816d8c46bcc683f0e9220ca50c0faaac)) // 28-pin custom-marked ROM ROM_END } // anonymous namespace SYST(1985, psr40, 0, 0, psr40, psr40, yamaha_psr40_state, empty_init, "Yamaha", "PSR-40", MACHINE_IS_SKELETON)