// license:BSD-3-Clause // copyright-holders:AJR /*********************************************************************************************************************************** Skeleton driver for Ann Arbor Ambassador terminal. ************************************************************************************************************************************/ #include "emu.h" #include "cpu/z80/z80.h" #include "machine/input_merger.h" #include "machine/mc2661.h" class aaa_state : public driver_device { public: aaa_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_pci(*this, "pci%u", 0U) , m_chargen(*this, "chargen") { } void aaa(machine_config &config); private: template u8 pci_r(offs_t offset); template void pci_w(offs_t offset, u8 data); void mem_map(address_map &map); void io_map(address_map &map); required_device m_maincpu; required_device_array m_pci; required_region_ptr m_chargen; }; template u8 aaa_state::pci_r(offs_t offset) { return m_pci[N]->read(offset >> 1); } template void aaa_state::pci_w(offs_t offset, u8 data) { m_pci[N]->write(offset >> 1, data); } void aaa_state::mem_map(address_map &map) { map(0x0000, 0x1fff).rom().region("maincpu", 0); map(0x2000, 0x27ff).ram(); map(0x2800, 0x2fff).ram(); // NVRAM? map(0x8000, 0x9fff).rom().region("maincpu", 0x8000); map(0xc000, 0xffff).ram(); } void aaa_state::io_map(address_map &map) { map.global_mask(0xff); map(0x00, 0x00).select(6).r(FUNC(aaa_state::pci_r<0>)); map(0x01, 0x01).select(6).w(FUNC(aaa_state::pci_w<0>)); map(0x40, 0x40).select(6).r(FUNC(aaa_state::pci_r<1>)); map(0x41, 0x41).select(6).w(FUNC(aaa_state::pci_w<1>)); map(0x87, 0x87).nopw(); } static INPUT_PORTS_START( aaa ) INPUT_PORTS_END void aaa_state::aaa(machine_config &config) { Z80(config, m_maincpu, 2'000'000); m_maincpu->set_addrmap(AS_PROGRAM, &aaa_state::mem_map); m_maincpu->set_addrmap(AS_IO, &aaa_state::io_map); input_merger_device &pciint(INPUT_MERGER_ANY_HIGH(config, "pciint")); // open collector? pciint.output_handler().set_inputline(m_maincpu, INPUT_LINE_IRQ0); MC2661(config, m_pci[0], 5.0688_MHz_XTAL); m_pci[0]->txrdy_handler().set("pciint", FUNC(input_merger_device::in_w<0>)); m_pci[0]->rxrdy_handler().set("pciint", FUNC(input_merger_device::in_w<1>)); m_pci[0]->txemt_dschg_handler().set("pciint", FUNC(input_merger_device::in_w<2>)); MC2661(config, m_pci[1], 5.0688_MHz_XTAL); m_pci[1]->txrdy_handler().set("pciint", FUNC(input_merger_device::in_w<3>)); m_pci[1]->rxrdy_handler().set("pciint", FUNC(input_merger_device::in_w<4>)); m_pci[1]->txemt_dschg_handler().set("pciint", FUNC(input_merger_device::in_w<5>)); } /************************************************************************************************************** Ann Arbor Ambassador. Chips: Z80A, M58725P (16k RAM), 2x SCN2651C, nvram, button-battery Crystals: 18.414, 6.0688 ***************************************************************************************************************/ ROM_START( aaa ) ROM_REGION(0x10000, "maincpu", 0) ROM_LOAD( "459_1.bin", 0x0000, 0x1000, CRC(55fb3e3b) SHA1(349cd257b1468827e1b389be7c989d0e4a13a5f1) ) ROM_LOAD( "459_3.bin", 0x1000, 0x1000, CRC(e1e84ca4) SHA1(42dc5f4211beee79178f0c03bb45c66833119eae) ) ROM_LOAD( "459_4.bin", 0x8000, 0x2000, CRC(4038aa89) SHA1(caf33c1f87aa396860324b9c73b35e4221f03d2e) ) ROM_REGION(0x1000, "chargen", 0) ROM_LOAD( "202510b.bin", 0x0000, 0x1000, CRC(deda4aa4) SHA1(0bce5a8dc260ba51f3e431d8da408eac1f41acf7) ) ROM_END COMP( 1981, aaa, 0, 0, aaa, aaa, aaa_state, empty_init, "Ann Arbor", "Ambassador", MACHINE_IS_SKELETON )