/********************************************************************* a2arcadeboard.c Implementation of the Third Millenium Engineering Arcade Board TODO: - VDPTEST program seems to want more than 16K of RAM, but docs/ads/press releases say 16k, period - MLDEMO program needs vsync IRQ from the TMS but doesn't program the registers the way our emulation wants to enable IRQs *********************************************************************/ #include "emu.h" #include "machine/a2arcadebd.h" /*************************************************************************** PARAMETERS ***************************************************************************/ #define TMS_TAG "arcbd_tms" #define AY_TAG "arcbd_ay" #define SCREEN_TAG "screen" //************************************************************************** // GLOBAL VARIABLES //************************************************************************** const device_type A2BUS_ARCADEBOARD = &device_creator; static const ay8910_interface arcadeboard_ay8910_interface = { AY8910_LEGACY_OUTPUT, AY8910_DEFAULT_LOADS, DEVCB_NULL }; static TMS9928A_INTERFACE(arcadeboard_tms9918a_interface) { SCREEN_TAG, 0x4000, // 16k of VRAM DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, a2bus_arcboard_device, tms_irq_w) }; MACHINE_CONFIG_FRAGMENT( arcadeboard ) MCFG_TMS9928A_ADD( TMS_TAG, TMS9918A, arcadeboard_tms9918a_interface ) MCFG_TMS9928A_SCREEN_ADD_NTSC( SCREEN_TAG ) MCFG_SCREEN_UPDATE_DEVICE( TMS_TAG, tms9918a_device, screen_update ) MCFG_SPEAKER_STANDARD_MONO("mono") MCFG_SOUND_ADD(AY_TAG, AY8910, 1022727) MCFG_SOUND_CONFIG(arcadeboard_ay8910_interface) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0) MACHINE_CONFIG_END //------------------------------------------------- // machine_config_additions - device-specific // machine configurations //------------------------------------------------- machine_config_constructor a2bus_arcboard_device::device_mconfig_additions() const { return MACHINE_CONFIG_NAME( arcadeboard ); } //************************************************************************** // LIVE DEVICE //************************************************************************** a2bus_arcboard_device::a2bus_arcboard_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, A2BUS_ARCADEBOARD, "Third Millenium Engineering Arcade Board", tag, owner, clock, "a2arcbd", __FILE__), device_a2bus_card_interface(mconfig, *this), m_tms(*this, TMS_TAG), m_ay(*this, AY_TAG) { } a2bus_arcboard_device::a2bus_arcboard_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source) : device_t(mconfig, type, name, tag, owner, clock, shortname, source), device_a2bus_card_interface(mconfig, *this), m_tms(*this, TMS_TAG), m_ay(*this, AY_TAG) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void a2bus_arcboard_device::device_start() { // set_a2bus_device makes m_slot valid set_a2bus_device(); } void a2bus_arcboard_device::device_reset() { } /* C0nx map: 0 - TMS read vram 1 - TMS read status 2 - TMS write vram 3 - TMS write register 5 - AY register select 6 - AY data */ UINT8 a2bus_arcboard_device::read_c0nx(address_space &space, UINT8 offset) { switch (offset) { case 0: return m_tms->vram_read(space, 0); case 1: return m_tms->register_read(space, 0); case 6: return m_ay->data_r(space, 0); } return 0xff; } void a2bus_arcboard_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data) { switch (offset) { case 2: m_tms->vram_write(space, 0, data); break; case 3: m_tms->register_write(space, 0, data); break; case 5: m_ay->address_w(space, 0, data); break; case 6: m_ay->data_w(space, 0, data); break; } } WRITE_LINE_MEMBER( a2bus_arcboard_device::tms_irq_w ) { if (state) { raise_slot_irq(); } else { lower_slot_irq(); } }