// license:BSD-3-Clause // copyright-holders:R. Belmont /********************************************************************* ezcgi.c "E-Z Color Graphics Interface" by Steve Ciarcia from BYTE Magazine, August, 1982 https://archive.org/details/byte-magazine-1982-08-rescan *********************************************************************/ #include "emu.h" #include "ezcgi.h" /*************************************************************************** PARAMETERS ***************************************************************************/ #define TMS_TAG "ezcgi_tms" #define SCREEN_TAG "screen" //************************************************************************** // GLOBAL VARIABLES //************************************************************************** const device_type A2BUS_EZCGI = &device_creator; const device_type A2BUS_EZCGI_9938 = &device_creator; const device_type A2BUS_EZCGI_9958 = &device_creator; MACHINE_CONFIG_FRAGMENT( ezcgi ) MCFG_DEVICE_ADD( TMS_TAG, TMS9918A, XTAL_10_738635MHz / 2 ) MCFG_TMS9928A_VRAM_SIZE(0x4000) // 16k of VRAM MCFG_TMS9928A_OUT_INT_LINE_CB(WRITELINE(a2bus_ezcgi_device, tms_irq_w)) MCFG_TMS9928A_SCREEN_ADD_NTSC( SCREEN_TAG ) MCFG_SCREEN_UPDATE_DEVICE( TMS_TAG, tms9918a_device, screen_update ) MACHINE_CONFIG_END #define MSX2_XBORDER_PIXELS 16 #define MSX2_YBORDER_PIXELS 28 #define MSX2_TOTAL_XRES_PIXELS 256 * 2 + (MSX2_XBORDER_PIXELS * 2) #define MSX2_TOTAL_YRES_PIXELS 212 * 2 + (MSX2_YBORDER_PIXELS * 2) #define MSX2_VISIBLE_XBORDER_PIXELS 8 * 2 #define MSX2_VISIBLE_YBORDER_PIXELS 14 * 2 MACHINE_CONFIG_FRAGMENT( ezcgi9938 ) MCFG_V9938_ADD(TMS_TAG, SCREEN_TAG, 0x30000, XTAL_21_4772MHz) // 192K of VRAM / typical 9938 clock, not verified MCFG_V99X8_INTERRUPT_CALLBACK(WRITELINE(a2bus_ezcgi_9938_device, tms_irq_w)) MCFG_SCREEN_ADD(SCREEN_TAG, RASTER) MCFG_SCREEN_VIDEO_ATTRIBUTES(VIDEO_UPDATE_BEFORE_VBLANK) MCFG_SCREEN_REFRESH_RATE(60) MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */ MCFG_SCREEN_UPDATE_DEVICE(TMS_TAG, v9938_device, screen_update) MCFG_SCREEN_SIZE(MSX2_TOTAL_XRES_PIXELS, 262*2) MCFG_SCREEN_VISIBLE_AREA(MSX2_XBORDER_PIXELS - MSX2_VISIBLE_XBORDER_PIXELS, MSX2_TOTAL_XRES_PIXELS - MSX2_XBORDER_PIXELS + MSX2_VISIBLE_XBORDER_PIXELS - 1, MSX2_YBORDER_PIXELS - MSX2_VISIBLE_YBORDER_PIXELS, MSX2_TOTAL_YRES_PIXELS - MSX2_YBORDER_PIXELS + MSX2_VISIBLE_YBORDER_PIXELS - 1) MCFG_SCREEN_PALETTE("ezcgi_tms:palette") MACHINE_CONFIG_END MACHINE_CONFIG_FRAGMENT( ezcgi9958 ) MCFG_V9958_ADD(TMS_TAG, SCREEN_TAG, 0x30000, XTAL_21_4772MHz) // 192K of VRAM / typcial 9938/9958 clock, not verified MCFG_V99X8_INTERRUPT_CALLBACK(WRITELINE(a2bus_ezcgi_9958_device, tms_irq_w)) MCFG_SCREEN_ADD(SCREEN_TAG, RASTER) MCFG_SCREEN_VIDEO_ATTRIBUTES(VIDEO_UPDATE_BEFORE_VBLANK) MCFG_SCREEN_REFRESH_RATE(60) MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */ MCFG_SCREEN_UPDATE_DEVICE(TMS_TAG, v9938_device, screen_update) MCFG_SCREEN_SIZE(MSX2_TOTAL_XRES_PIXELS, 262*2) MCFG_SCREEN_VISIBLE_AREA(MSX2_XBORDER_PIXELS - MSX2_VISIBLE_XBORDER_PIXELS, MSX2_TOTAL_XRES_PIXELS - MSX2_XBORDER_PIXELS + MSX2_VISIBLE_XBORDER_PIXELS - 1, MSX2_YBORDER_PIXELS - MSX2_VISIBLE_YBORDER_PIXELS, MSX2_TOTAL_YRES_PIXELS - MSX2_YBORDER_PIXELS + MSX2_VISIBLE_YBORDER_PIXELS - 1) MCFG_SCREEN_PALETTE("ezcgi_tms:palette") MACHINE_CONFIG_END //------------------------------------------------- // machine_config_additions - device-specific // machine configurations //------------------------------------------------- machine_config_constructor a2bus_ezcgi_device::device_mconfig_additions() const { return MACHINE_CONFIG_NAME( ezcgi ); } machine_config_constructor a2bus_ezcgi_9938_device::device_mconfig_additions() const { return MACHINE_CONFIG_NAME( ezcgi9938 ); } machine_config_constructor a2bus_ezcgi_9958_device::device_mconfig_additions() const { return MACHINE_CONFIG_NAME( ezcgi9958 ); } //************************************************************************** // LIVE DEVICE //************************************************************************** a2bus_ezcgi_device::a2bus_ezcgi_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, A2BUS_EZCGI, "E-Z Color Graphics Interface", tag, owner, clock, "a2ezcgi", __FILE__), device_a2bus_card_interface(mconfig, *this), m_tms(*this, TMS_TAG) { } a2bus_ezcgi_device::a2bus_ezcgi_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) { } a2bus_ezcgi_9938_device::a2bus_ezcgi_9938_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, A2BUS_EZCGI_9938, "E-Z Color Graphics Interface (TMS9938)", tag, owner, clock, "a2ezcgi3", __FILE__), device_a2bus_card_interface(mconfig, *this), m_tms(*this, TMS_TAG) { } a2bus_ezcgi_9938_device::a2bus_ezcgi_9938_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) { } a2bus_ezcgi_9958_device::a2bus_ezcgi_9958_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, A2BUS_EZCGI_9958, "E-Z Color Graphics Interface (TMS9958)", tag, owner, clock, "a2ezcgi5", __FILE__), device_a2bus_card_interface(mconfig, *this), m_tms(*this, TMS_TAG) { } a2bus_ezcgi_9958_device::a2bus_ezcgi_9958_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) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void a2bus_ezcgi_device::device_start() { // set_a2bus_device makes m_slot valid set_a2bus_device(); } void a2bus_ezcgi_device::device_reset() { } void a2bus_ezcgi_9938_device::device_start() { // set_a2bus_device makes m_slot valid set_a2bus_device(); } void a2bus_ezcgi_9938_device::device_reset() { } void a2bus_ezcgi_9958_device::device_start() { // set_a2bus_device makes m_slot valid set_a2bus_device(); } void a2bus_ezcgi_9958_device::device_reset() { } /* C0nx map: 0 - TMS read 1 - TMS write */ UINT8 a2bus_ezcgi_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); } return 0xff; } void a2bus_ezcgi_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data) { switch (offset) { case 0: m_tms->vram_write(space, 0, data); break; case 1: m_tms->register_write(space, 0, data); break; } } UINT8 a2bus_ezcgi_9938_device::read_c0nx(address_space &space, UINT8 offset) { switch (offset) { case 0: return m_tms->vram_r(); case 1: return m_tms->status_r(); } return 0xff; } void a2bus_ezcgi_9938_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data) { switch (offset) { case 0: m_tms->vram_w(data); break; case 1: m_tms->command_w(data); break; case 2: m_tms->palette_w(data); break; case 3: m_tms->register_w(data); break; } } UINT8 a2bus_ezcgi_9958_device::read_c0nx(address_space &space, UINT8 offset) { switch (offset) { case 0: return m_tms->vram_r(); case 1: return m_tms->status_r(); } return 0xff; } void a2bus_ezcgi_9958_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data) { switch (offset) { case 0: m_tms->vram_w(data); break; case 1: m_tms->command_w(data); break; case 2: m_tms->palette_w(data); break; case 3: m_tms->register_w(data); break; } } WRITE_LINE_MEMBER( a2bus_ezcgi_device::tms_irq_w ) { if (state) { raise_slot_irq(); } else { lower_slot_irq(); } } WRITE_LINE_MEMBER( a2bus_ezcgi_9938_device::tms_irq_w ) { if (state) { raise_slot_irq(); } else { lower_slot_irq(); } } WRITE_LINE_MEMBER( a2bus_ezcgi_9958_device::tms_irq_w ) { if (state) { raise_slot_irq(); } else { lower_slot_irq(); } }