// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** TIKI-100 8/16 8088/8087 expansion card emulation **********************************************************************/ #include "emu.h" #include "8088.h" //************************************************************************** // MACROS/CONSTANTS //************************************************************************** #define I8088_TAG "u3" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(TIKI100_8088, tiki100_8088_device, "tiki100_8088", "TIKI-100 8/16") //------------------------------------------------- // ROM( tiki100_8088 ) //------------------------------------------------- ROM_START( tiki100_8088 ) ROM_REGION( 0x1000, I8088_TAG, 0 ) ROM_LOAD( "boot 1.0.u3", 0x0000, 0x1000, CRC(436974aa) SHA1(837087b3ab982d047e4f15799fef3daa37dd6c01) ) ROM_REGION( 0x100, "u26", 0 ) ROM_LOAD( "53ls140.u26", 0x000, 0x100, CRC(fc5902e1) SHA1(afb9cb54ab6fc449e7544ddb3cbebc3770c4f937) ) ROM_END //------------------------------------------------- // rom_region - device-specific ROM region //------------------------------------------------- const tiny_rom_entry *tiki100_8088_device::device_rom_region() const { return ROM_NAME( tiki100_8088 ); } void tiki100_8088_device::i8088_mem(address_map &map) { map(0x00000, 0xbffff).ram(); //map(0xc0000, 0xcffff).rw(m_bus, FUNC(tiki100_bus_device::exin_mrq_r), FUNC(tiki100_bus_device::exin_mrq_w)); don't have m_bus until start map(0xff000, 0xfffff).rom().region(I8088_TAG, 0); } void tiki100_8088_device::i8088_io(address_map &map) { map(0x7f, 0x7f).rw(FUNC(tiki100_8088_device::read), FUNC(tiki100_8088_device::write)); } //------------------------------------------------- // device_add_mconfig() //------------------------------------------------- void tiki100_8088_device::device_add_mconfig(machine_config &config) { I8088(config, m_maincpu, 6000000); m_maincpu->set_addrmap(AS_PROGRAM, &tiki100_8088_device::i8088_mem); m_maincpu->set_addrmap(AS_IO, &tiki100_8088_device::i8088_io); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // tiki100_8088_device - constructor //------------------------------------------------- tiki100_8088_device::tiki100_8088_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, TIKI100_8088, tag, owner, clock), device_tiki100bus_card_interface(mconfig, *this), m_maincpu(*this, I8088_TAG), m_data(0) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void tiki100_8088_device::device_start() { m_maincpu->space(AS_PROGRAM).install_readwrite_handler( 0xc0000, 0xcffff, read8sm_delegate(*m_bus, FUNC(tiki100_bus_device::exin_mrq_r)), write8sm_delegate(*m_bus, FUNC(tiki100_bus_device::exin_mrq_w))); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void tiki100_8088_device::device_reset() { m_maincpu->reset(); m_data = 0; } //------------------------------------------------- // tiki100bus_iorq_r - I/O read //------------------------------------------------- uint8_t tiki100_8088_device::iorq_r(offs_t offset, uint8_t data) { if ((offset & 0xff) == 0x7f) { data = m_data; } return data; } //------------------------------------------------- // tiki100bus_iorq_w - I/O write //------------------------------------------------- void tiki100_8088_device::iorq_w(offs_t offset, uint8_t data) { if ((offset & 0xff) == 0x7f) { m_data = data & 0x0f; if (BIT(data, 5)) { device_reset(); } } } //------------------------------------------------- // read - //------------------------------------------------- uint8_t tiki100_8088_device::read() { return m_busak << 4 | m_data; } //------------------------------------------------- // write - //------------------------------------------------- void tiki100_8088_device::write(uint8_t data) { m_data = data & 0x0f; m_bus->busrq_w(BIT(data, 4)); }