/*************************************************************************** SuperMac Spectrum PDQ video card Accelerated only in 256 color mode. Accleration is not yet emulated properly (pattern fill works but has glitches). Use in B&W or 16 colors for full functionality right now. blitter info: ctrl 1 = ? ctrl 2 = low 3 bits of Y position in bits 3-5, low 3 bits of X position in bits 0-2 ctrl 3 = width ctrl 4 = height ctrl 5 = ? ctrl 6 = VRAM offset * 4 ctrl 7 = command/execute (00000002 for pattern fill, 00000100 for copy) Busy flag at Fs800000 (bit 8) There is 256 bytes of pattern RAM arranged as 32 pixels horizontally by 8 vertically. ***************************************************************************/ #include "emu.h" #include "video/nubus_specpdq.h" #define SPECPDQ_SCREEN_NAME "specpdq_screen" #define SPECPDQ_ROM_REGION "specpdq_rom" #define VRAM_SIZE (0x400000) static SCREEN_UPDATE_RGB32( specpdq ); MACHINE_CONFIG_FRAGMENT( specpdq ) MCFG_SCREEN_ADD( SPECPDQ_SCREEN_NAME, RASTER) MCFG_SCREEN_UPDATE_STATIC(specpdq) MCFG_SCREEN_RAW_PARAMS(25175000, 800, 0, 640, 525, 0, 480) MCFG_SCREEN_SIZE(1280,1024) MCFG_SCREEN_VISIBLE_AREA(0, 1152-1, 0, 844-1) MACHINE_CONFIG_END ROM_START( specpdq ) ROM_REGION(0x10000, SPECPDQ_ROM_REGION, 0) ROM_LOAD( "specpdq.bin", 0x000000, 0x010000, CRC(82a35f78) SHA1(9511c2df47140f4279196d3b8836b53429879dd9) ) ROM_END //************************************************************************** // GLOBAL VARIABLES //************************************************************************** const device_type NUBUS_SPECPDQ = &device_creator; //------------------------------------------------- // machine_config_additions - device-specific // machine configurations //------------------------------------------------- machine_config_constructor nubus_specpdq_device::device_mconfig_additions() const { return MACHINE_CONFIG_NAME( specpdq ); } //------------------------------------------------- // rom_region - device-specific ROM region //------------------------------------------------- const rom_entry *nubus_specpdq_device::device_rom_region() const { return ROM_NAME( specpdq ); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // nubus_specpdq_device - constructor //------------------------------------------------- nubus_specpdq_device::nubus_specpdq_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, NUBUS_SPECPDQ, "SuperMac Spectrum PDQ video card", tag, owner, clock), device_nubus_card_interface(mconfig, *this) { m_shortname = "nb_spdq"; } nubus_specpdq_device::nubus_specpdq_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, type, name, tag, owner, clock), device_nubus_card_interface(mconfig, *this) { m_shortname = "nb_spdq"; } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void nubus_specpdq_device::device_start() { UINT32 slotspace; // set_nubus_device makes m_slot valid set_nubus_device(); install_declaration_rom(this, SPECPDQ_ROM_REGION); slotspace = get_slotspace(); // printf("[specpdq %p] slotspace = %x\n", this, slotspace); m_vram = auto_alloc_array(machine(), UINT8, VRAM_SIZE); m_vram32 = (UINT32 *)m_vram; m_nubus->install_device(slotspace, slotspace+VRAM_SIZE-1, read32_delegate(FUNC(nubus_specpdq_device::vram_r), this), write32_delegate(FUNC(nubus_specpdq_device::vram_w), this)); m_nubus->install_device(slotspace+0x400000, slotspace+0xfbffff, read32_delegate(FUNC(nubus_specpdq_device::specpdq_r), this), write32_delegate(FUNC(nubus_specpdq_device::specpdq_w), this)); m_timer = timer_alloc(0, NULL); m_screen = NULL; // can we look this up now? } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void nubus_specpdq_device::device_reset() { m_count = 0; m_clutoffs = 0; m_vbl_disable = 1; m_mode = 0; memset(m_vram, 0, VRAM_SIZE); memset(m_palette, 0, sizeof(m_palette)); m_palette[0] = MAKE_RGB(255, 255, 255); m_palette[0x80] = MAKE_RGB(0, 0, 0); } void nubus_specpdq_device::device_timer(emu_timer &timer, device_timer_id tid, int param, void *ptr) { if (!m_vbl_disable) { raise_slot_irq(); } m_timer->adjust(m_screen->time_until_pos(843, 0), 0); } /*************************************************************************** Spectrum 24 PDQ section ***************************************************************************/ static SCREEN_UPDATE_RGB32( specpdq ) { UINT32 *scanline; int x, y; nubus_specpdq_device *card = downcast(screen.owner()); UINT8 pixels, *vram; // first time? kick off the VBL timer if (!card->m_screen) { card->m_screen = &screen; card->m_timer->adjust(card->m_screen->time_until_pos(843, 0), 0); } vram = card->m_vram + 0x9000; switch (card->m_mode) { case 0: // 1 bpp for (y = 0; y < 844; y++) { scanline = &bitmap.pix32(y); for (x = 0; x < 1152/8; x++) { pixels = vram[(y * 512) + (BYTE4_XOR_BE(x))]; *scanline++ = card->m_palette[(pixels&0x80)]; *scanline++ = card->m_palette[((pixels<<1)&0x80)]; *scanline++ = card->m_palette[((pixels<<2)&0x80)]; *scanline++ = card->m_palette[((pixels<<3)&0x80)]; *scanline++ = card->m_palette[((pixels<<4)&0x80)]; *scanline++ = card->m_palette[((pixels<<5)&0x80)]; *scanline++ = card->m_palette[((pixels<<6)&0x80)]; *scanline++ = card->m_palette[((pixels<<7)&0x80)]; } } break; case 1: // 2 bpp for (y = 0; y < 844; y++) { scanline = &bitmap.pix32(y); for (x = 0; x < 1152/4; x++) { pixels = vram[(y * 512) + (BYTE4_XOR_BE(x))]; *scanline++ = card->m_palette[(pixels&0xc0)]; *scanline++ = card->m_palette[((pixels<<2)&0xc0)]; *scanline++ = card->m_palette[((pixels<<4)&0xc0)]; *scanline++ = card->m_palette[((pixels<<6)&0xc0)]; } } break; case 2: // 4 bpp for (y = 0; y < 844; y++) { scanline = &bitmap.pix32(y); for (x = 0; x < 1152/2; x++) { pixels = vram[(y * 1024) + (BYTE4_XOR_BE(x))]; *scanline++ = card->m_palette[(pixels&0xf0)]; *scanline++ = card->m_palette[((pixels<<4)&0xf0)]; } } break; case 3: // 8 bpp for (y = 0; y < 844; y++) { scanline = &bitmap.pix32(y); for (x = 0; x < 1152; x++) { pixels = vram[(y * 1152) + (BYTE4_XOR_BE(x))]; *scanline++ = card->m_palette[pixels]; } } break; default: fatalerror("specpdq: unknown video mode %d\n", card->m_mode); break; } return 0; } WRITE32_MEMBER( nubus_specpdq_device::specpdq_w ) { if (offset >= 0xc0000 && offset < 0x100000) { COMBINE_DATA(&m_7xxxxx_regs[offset-0xc0000]); } switch (offset) { case 0xc0054: // mode 1 // printf("%x to mode1\n", data); break; case 0xc005c: // interrupt control if (!(data & 0x8000)) { m_vbl_disable = 1; } else { m_vbl_disable = 0; lower_slot_irq(); } break; case 0xc005e: // not sure, interrupt related? break; case 0xc007a: // printf("%x to mode2\n", data); switch (data) { case 0xff7fffff: m_mode = 0; break; case 0xfeffffff: m_mode = 2; break; case 0xfedfffff: m_mode = 3; break; } // printf("m_mode = %d\n", m_mode); break; case 0x120000: // DAC address // printf("%08x to DAC control (PC=%x)\n", data, space.device().safe_pc()); m_clutoffs = ((data>>8)&0xff)^0xff; break; case 0x120001: // DAC data m_colors[m_count++] = ((data>>8)&0xff)^0xff; if (m_count == 3) { // printf("RAMDAC: color %d = %02x %02x %02x (PC=%x)\n", m_clutoffs, m_colors[0], m_colors[1], m_colors[2], space.device().safe_pc() ); palette_set_color(space.machine(), m_clutoffs, MAKE_RGB(m_colors[0], m_colors[1], m_colors[2])); m_palette[m_clutoffs] = MAKE_RGB(m_colors[0], m_colors[1], m_colors[2]); m_clutoffs++; if (m_clutoffs > 255) { m_clutoffs = 0; } m_count = 0; } break; // blitter texture? pattern? 256 pixels worth at 8bpp case 0x181000: case 0x181001: case 0x181002: case 0x181003: case 0x181004: case 0x181005: case 0x181006: case 0x181007: case 0x181008: case 0x181009: case 0x18100a: case 0x18100b: case 0x18100c: case 0x18100d: case 0x18100e: case 0x18100f: case 0x181010: case 0x181011: case 0x181012: case 0x181013: case 0x181014: case 0x181015: case 0x181016: case 0x181017: case 0x181018: case 0x181019: case 0x18101a: case 0x18101b: case 0x18101c: case 0x18101d: case 0x18101e: case 0x18101f: case 0x181020: case 0x181021: case 0x181022: case 0x181023: case 0x181024: case 0x181025: case 0x181026: case 0x181027: case 0x181028: case 0x181029: case 0x18102a: case 0x18102b: case 0x18102c: case 0x18102d: case 0x18102e: case 0x18102f: case 0x181030: case 0x181031: case 0x181032: case 0x181033: case 0x181034: case 0x181035: case 0x181036: case 0x181037: case 0x181038: case 0x181039: case 0x18103a: case 0x18103b: case 0x18103c: case 0x18103d: case 0x18103e: case 0x18103f: // printf("Pattern %08x @ %x\n", data ^ 0xffffffff, offset); m_fillbytes[((offset&0x3f)*4)] = ((data>>24) & 0xff) ^ 0xff; m_fillbytes[((offset&0x3f)*4)+1] = ((data>>16) & 0xff) ^ 0xff; m_fillbytes[((offset&0x3f)*4)+2] = ((data>>8) & 0xff) ^ 0xff; m_fillbytes[((offset&0x3f)*4)+3] = (data& 0xff) ^ 0xff; break; // blitter control case 0x182006: // printf("%08x (%d) to blitter ctrl 1 (PC=%x)\n", data^0xffffffff, data^0xffffffff, space.device().safe_pc()); break; case 0x182008: // printf("%08x (%d) to blitter ctrl 2 (PC=%x)\n", data^0xffffffff, data^0xffffffff, space.device().safe_pc()); m_patofsx = (data ^ 0xffffffff) & 7; m_patofsy = ((data ^ 0xffffffff)>>3) & 7; break; case 0x18200e: // printf("%08x (%d) to blitter ctrl 3 (PC=%x)\n", data^0xffffffff, data^0xffffffff, space.device().safe_pc()); m_width = data ^ 0xffffffff; break; case 0x18200b: // printf("%08x (%d) to blitter ctrl 4 (PC=%x)\n", data^0xffffffff, data^0xffffffff, space.device().safe_pc()); m_height = (data ^ 0xffffffff) & 0xffff; break; case 0x18200a: data ^= 0xffffffff; // printf("%08x to blitter ctrl 5 (PC=%x)\n", data, space.device().safe_pc()); m_vram_src = data>>2; break; case 0x182009: data ^= 0xffffffff; // printf("%08x to blitter ctrl 6 (PC=%x)\n", data, space.device().safe_pc()); m_vram_addr = data>>2; break; case 0x182007: data ^= 0xffffffff; // printf("%08x to blitter ctrl 7 (PC=%x)\n", data, space.device().safe_pc()); // fill rectangle if (data == 2) { int x, y; UINT8 *vram = m_vram + m_vram_addr + m_patofsx; // m_vram_addr is missing the low 2 bits, we add them back here // printf("Fill rectangle with %02x %02x %02x %02x, width %d height %d\n", m_fillbytes[0], m_fillbytes[1], m_fillbytes[2], m_fillbytes[3], m_width, m_height); for (y = 0; y < m_height; y++) { for (x = 0; x < m_width; x++) { vram[(y * 1152)+x] = m_fillbytes[((m_patofsx + x) & 0x1f)+(((m_patofsy + y) & 0x7)*32)]; } } } else if ((data == 0x101) || (data == 0x100)) { int x, y; UINT8 *vram = m_vram + m_vram_addr; UINT8 *vramsrc = m_vram + m_vram_src; // printf("Copy rectangle, width %d height %d src %x dst %x\n", m_width, m_height, m_vram_addr, m_vram_src); for (y = 0; y < m_height; y++) { for (x = 0; x < m_width; x++) { vram[(y * 1152)+x] = vramsrc[(y * 1152)+x]; } } } else { printf("Unknown blitter command %08x\n", data); } break; default: // printf("specpdq_w: %08x @ %x (mask %08x PC=%x)\n", data^0xffffffff, offset, mem_mask, space.device().safe_pc()); break; } } READ32_MEMBER( nubus_specpdq_device::specpdq_r ) { // if (offset != 0xc005c && offset != 0xc005e) printf("specpdq_r: @ %x (mask %08x PC=%x)\n", offset, mem_mask, space.device().safe_pc()); if (offset >= 0xc0000 && offset < 0x100000) { return m_7xxxxx_regs[offset-0xc0000]; } return 0; } WRITE32_MEMBER( nubus_specpdq_device::vram_w ) { data ^= 0xffffffff; COMBINE_DATA(&m_vram32[offset]); } READ32_MEMBER( nubus_specpdq_device::vram_r ) { return m_vram32[offset] ^ 0xffffffff; }