// license:BSD-3-Clause // copyright-holders:R. Belmont /*************************************************************************** RasterOps ColorBoard 264/SE30 video card emulation ***************************************************************************/ #include "emu.h" #include "pds30_cb264.h" #define CB264SE30_SCREEN_NAME "cb264_screen" #define CB264SE30_ROM_REGION "cb264_rom" #define VRAM_SIZE (0x200000) MACHINE_CONFIG_FRAGMENT( cb264se30 ) MCFG_SCREEN_ADD( CB264SE30_SCREEN_NAME, RASTER) MCFG_SCREEN_UPDATE_DEVICE(DEVICE_SELF, nubus_cb264se30_device, screen_update) MCFG_SCREEN_RAW_PARAMS(25175000, 800, 0, 640, 525, 0, 480) MCFG_SCREEN_SIZE(1024,768) MCFG_SCREEN_VISIBLE_AREA(0, 640-1, 0, 480-1) MACHINE_CONFIG_END ROM_START( cb264se30 ) ROM_REGION(0x8000, CB264SE30_ROM_REGION, 0) ROM_LOAD( "0002-2019_10-02-90.bin", 0x000000, 0x008000, CRC(5b5b2fab) SHA1(0584deb38b402718f2abef456b0035b34fddb473) ) // EPROM label "264/30 V1.3 0002-2019 10/02/90" ROM_END //************************************************************************** // GLOBAL VARIABLES //************************************************************************** const device_type PDS030_CB264SE30 = &device_creator; //------------------------------------------------- // machine_config_additions - device-specific // machine configurations //------------------------------------------------- machine_config_constructor nubus_cb264se30_device::device_mconfig_additions() const { return MACHINE_CONFIG_NAME( cb264se30 ); } //------------------------------------------------- // rom_region - device-specific ROM region //------------------------------------------------- const rom_entry *nubus_cb264se30_device::device_rom_region() const { return ROM_NAME( cb264se30 ); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // nubus_cb264se30_device - constructor //------------------------------------------------- nubus_cb264se30_device::nubus_cb264se30_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, PDS030_CB264SE30, "RasterOps Colorboard 264/SE30", tag, owner, clock, "pd3_c264", __FILE__), device_video_interface(mconfig, *this), device_nubus_card_interface(mconfig, *this), m_vram32(nullptr), m_mode(0), m_vbl_disable(0), m_toggle(0), m_count(0), m_clutoffs(0), m_timer(nullptr) { m_assembled_tag = std::string(tag).append(":").append(CB264SE30_SCREEN_NAME); m_screen_tag = m_assembled_tag.c_str(); } nubus_cb264se30_device::nubus_cb264se30_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_video_interface(mconfig, *this), device_nubus_card_interface(mconfig, *this), m_vram32(nullptr), m_mode(0), m_vbl_disable(0), m_toggle(0), m_count(0), m_clutoffs(0), m_timer(nullptr) { m_assembled_tag = std::string(tag).append(":").append(CB264SE30_SCREEN_NAME); m_screen_tag = m_assembled_tag.c_str(); } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void nubus_cb264se30_device::device_start() { UINT32 slotspace; // set_nubus_device makes m_slot valid set_nubus_device(); install_declaration_rom(this, CB264SE30_ROM_REGION); slotspace = get_slotspace(); // printf("[cb264se30 %p] slotspace = %x\n", this, slotspace); m_vram.resize(VRAM_SIZE); m_vram32 = (UINT32 *)&m_vram[0]; m_nubus->install_device(slotspace, slotspace+VRAM_SIZE-1, read32_delegate(FUNC(nubus_cb264se30_device::vram_r), this), write32_delegate(FUNC(nubus_cb264se30_device::vram_w), this)); m_nubus->install_device(slotspace+0xf00000, slotspace+0xfeffff, read32_delegate(FUNC(nubus_cb264se30_device::cb264se30_r), this), write32_delegate(FUNC(nubus_cb264se30_device::cb264se30_w), this)); m_timer = timer_alloc(0, nullptr); m_timer->adjust(m_screen->time_until_pos(479, 0), 0); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void nubus_cb264se30_device::device_reset() { m_count = 0; m_clutoffs = 0; m_vbl_disable = 1; m_mode = 4; memset(&m_vram[0], 0, VRAM_SIZE); memset(m_palette, 0, sizeof(m_palette)); m_palette[0] = rgb_t(255, 255, 255); m_palette[0x80] = rgb_t(0, 0, 0); } void nubus_cb264se30_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(479, 0), 0); } /*************************************************************************** CB264 section ***************************************************************************/ UINT32 nubus_cb264se30_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) { UINT32 *scanline; int x, y; UINT8 pixels, *vram; vram = &m_vram[8*1024]; switch (m_mode) { case 0: // 1 bpp? for (y = 0; y < 480; y++) { scanline = &bitmap.pix32(y); for (x = 0; x < 640/8; x++) { pixels = vram[(y * 1024) + (BYTE4_XOR_BE(x))]; *scanline++ = m_palette[(pixels&0x80)]; *scanline++ = m_palette[((pixels<<1)&0x80)]; *scanline++ = m_palette[((pixels<<2)&0x80)]; *scanline++ = m_palette[((pixels<<3)&0x80)]; *scanline++ = m_palette[((pixels<<4)&0x80)]; *scanline++ = m_palette[((pixels<<5)&0x80)]; *scanline++ = m_palette[((pixels<<6)&0x80)]; *scanline++ = m_palette[((pixels<<7)&0x80)]; } } break; case 1: // 2 bpp for (y = 0; y < 480; y++) { scanline = &bitmap.pix32(y); for (x = 0; x < 640/4; x++) { pixels = vram[(y * 1024) + (BYTE4_XOR_BE(x))]; *scanline++ = m_palette[(pixels&0xc0)]; *scanline++ = m_palette[((pixels<<2)&0xc0)]; *scanline++ = m_palette[((pixels<<4)&0xc0)]; *scanline++ = m_palette[((pixels<<6)&0xc0)]; } } break; case 2: // 4 bpp for (y = 0; y < 480; y++) { scanline = &bitmap.pix32(y); for (x = 0; x < 640/2; x++) { pixels = vram[(y * 1024) + (BYTE4_XOR_BE(x))]; *scanline++ = m_palette[(pixels&0xf0)]; *scanline++ = m_palette[((pixels&0x0f)<<4)]; } } break; case 3: // 8 bpp for (y = 0; y < 480; y++) { scanline = &bitmap.pix32(y); for (x = 0; x < 640; x++) { pixels = vram[(y * 1024) + (BYTE4_XOR_BE(x))]; *scanline++ = m_palette[pixels]; } } break; case 4: // 24 bpp { UINT32 *vram32 = (UINT32 *)&m_vram[0]; UINT32 *base; for (y = 0; y < 480; y++) { scanline = &bitmap.pix32(y); base = &vram32[y * 1024]; for (x = 0; x < 640; x++) { *scanline++ = *base++; } } } break; default: fatalerror("cb264se30: unknown video mode %d\n", m_mode); } return 0; } WRITE32_MEMBER( nubus_cb264se30_device::cb264se30_w ) { switch (offset) { case 0x38003: // mode // if (data != 0x08000000) printf("%08x to mode\n", data); switch (data & 0xff000000) { case 0x38000000: m_mode = 0; break; case 0x39000000: m_mode = 1; break; case 0x3a000000: m_mode = 2; break; case 0x3b000000: m_mode = 3; break; case 0x3f000000: m_mode = 4; break; } break; case 0x38000: if (mem_mask == 0xff000000) { // printf("%08x to DAC control (PC=%x)\n", data, space.device().safe_pc()); m_clutoffs = (data>>24)&0xff; } else if (mem_mask == 0x0000ff00) { m_colors[m_count++] = (data>>8) & 0xff; if (m_count == 3) { // printf("RAMDAC: color %02x = %02x %02x %02x (PC=%x)\n", m_clutoffs, m_colors[0], m_colors[1], m_colors[2], space.device().safe_pc() ); m_palette[m_clutoffs] = rgb_t(m_colors[0], m_colors[1], m_colors[2]); m_clutoffs++; if (m_clutoffs > 255) { m_clutoffs = 0; } m_count = 0; } } break; case 0x2c017: // VBL control if (data & 0x06000000) { m_vbl_disable = 0; lower_slot_irq(); } else { m_vbl_disable = 1; } break; default: // printf("cb264se30_w: %08x @ %x, mask %08x (PC=%x)\n", data, offset, mem_mask, space.device().safe_pc()); break; } } READ32_MEMBER( nubus_cb264se30_device::cb264se30_r ) { return 0; } WRITE32_MEMBER( nubus_cb264se30_device::vram_w ) { COMBINE_DATA(&m_vram32[offset]); } READ32_MEMBER( nubus_cb264se30_device::vram_r ) { return m_vram32[offset]; }