// license:BSD-3-Clause // copyright-holders:David Haywood,Alex Marshall /*************************************************************************** NMK004 emulation ***************************************************************************/ #include "emu.h" #include "nmk004.h" WRITE8_MEMBER( nmk004_device::write ) { space.machine().scheduler().synchronize(); to_nmk004 = data; } READ8_MEMBER( nmk004_device::read ) { space.machine().scheduler().synchronize(); return to_main; } WRITE8_MEMBER(nmk004_device::nmk004_port4_w) { // bit 0x08 toggles frequently but is connected to nothing? // bit 0x01 is set to reset the 68k m_systemcpu->set_input_line(INPUT_LINE_RESET, (data & 1) ? ASSERT_LINE : CLEAR_LINE); } WRITE8_MEMBER(nmk004_device::nmk004_oki0_bankswitch_w) { UINT8 *rom = memregion(":oki1")->base(); data++; // so that 3 wraps around data &= 3; memcpy(rom + 0x20000,rom + 0x20000 + data * 0x20000,0x20000); } WRITE8_MEMBER(nmk004_device::nmk004_oki1_bankswitch_w) { UINT8 *rom = memregion(":oki2")->base(); data++; // so that 3 wraps around data &= 3; memcpy(rom + 0x20000,rom + 0x20000 + data * 0x20000,0x20000); } READ8_MEMBER(nmk004_device::nmk004_tonmk004_r) { space.machine().scheduler().synchronize(); return to_nmk004; } WRITE8_MEMBER(nmk004_device::nmk004_tomain_w) { space.machine().scheduler().synchronize(); to_main = data; } void nmk004_device::ym2203_irq_handler(int irq) { m_cpu->set_input_line(0, irq ? ASSERT_LINE : CLEAR_LINE); } static ADDRESS_MAP_START( nmk004_sound_mem_map, AS_PROGRAM, 8, nmk004_device ) //AM_RANGE(0x0000, 0x1fff) AM_ROM /* 0x0000 - 0x1fff = internal ROM */ AM_RANGE(0x2000, 0xefff) AM_ROM AM_REGION(":audiocpu", 0x2000 ) AM_RANGE(0xf000, 0xf7ff) AM_RAM AM_RANGE(0xf800, 0xf801) AM_DEVREADWRITE(":ymsnd", ym2203_device, read, write) AM_RANGE(0xf900, 0xf900) AM_DEVREADWRITE(":oki1", okim6295_device, read, write) AM_RANGE(0xfa00, 0xfa00) AM_DEVREADWRITE(":oki2", okim6295_device, read, write) AM_RANGE(0xfb00, 0xfb00) AM_READ(nmk004_tonmk004_r) // from main cpu AM_RANGE(0xfc00, 0xfc00) AM_WRITE(nmk004_tomain_w) // to main cpu AM_RANGE(0xfc01, 0xfc01) AM_WRITE(nmk004_oki0_bankswitch_w) AM_RANGE(0xfc02, 0xfc02) AM_WRITE(nmk004_oki1_bankswitch_w) ADDRESS_MAP_END static ADDRESS_MAP_START( nmk004_sound_io_map, AS_IO, 8, nmk004_device ) AM_RANGE(0xFFC8, 0xFFC8) AM_WRITE(nmk004_port4_w) ADDRESS_MAP_END static MACHINE_CONFIG_FRAGMENT( nmk004 ) MCFG_CPU_ADD("mcu",TMP90840, DERIVED_CLOCK(1,1)) // Toshiba TMP90C840AF in QFP64 package with 8Kbyte internal ROM MCFG_CPU_PROGRAM_MAP(nmk004_sound_mem_map) MCFG_CPU_IO_MAP(nmk004_sound_io_map) MACHINE_CONFIG_END ROM_START( nmk004 ) ROM_REGION( 0x2000, "mcu", 0 ) ROM_LOAD( "nmk004.bin", 0x00000, 0x02000, CRC(83b6f611) SHA1(bb7ddc00affe8a066002ecd6858dbd2854af8940) ) ROM_END const device_type NMK004 = &device_creator; nmk004_device::nmk004_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, NMK004, "NMK004", tag, owner, clock, "nmk004", __FILE__), m_cpu(*this, "mcu"), m_systemcpu(*this, ":maincpu"), to_nmk004(0xff), to_main(0xff) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void nmk004_device::device_start() { } //------------------------------------------------- // device_mconfig_additions - return a pointer to // the device's machine fragment //------------------------------------------------- machine_config_constructor nmk004_device::device_mconfig_additions() const { return MACHINE_CONFIG_NAME( nmk004 ); } //------------------------------------------------- // device_rom_region - return a pointer to the // the device's ROM definitions //------------------------------------------------- const rom_entry *nmk004_device::device_rom_region() const { return ROM_NAME(nmk004 ); }