// license:BSD-3-Clause // copyright-holders:R. Belmont /*************************************************************************** Micron/XCEED Technologies Color 30HR Fs800000 - Mode A FsA00000 - Mode B FsC00000 - RAMDAC write offset FsC00004 - RAMDAC write data FsC00008 - RAMDAC write mask FsC0000C - RAMDAC read offset ***************************************************************************/ #include "emu.h" #include "pds30_30hr.h" #define XCEED30HR_SCREEN_NAME "x30hr_screen" #define XCEED30HR_ROM_REGION "x30hr_rom" #define VRAM_SIZE (0x100000) // 1 MB VRAM - max mode is 1024x768 @ 8bpp MACHINE_CONFIG_FRAGMENT( xceed30hr ) MCFG_SCREEN_ADD( XCEED30HR_SCREEN_NAME, RASTER) MCFG_SCREEN_UPDATE_DEVICE(DEVICE_SELF, nubus_xceed30hr_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( xceed30hr ) ROM_REGION(0x8000, XCEED30HR_ROM_REGION, 0) ROM_LOAD( "369c.rom", 0x000000, 0x008000, CRC(b22f0a89) SHA1(be34c8604b8a1ae9c9f3b0b90faba9a1a64a5855) ) ROM_END //************************************************************************** // GLOBAL VARIABLES //************************************************************************** const device_type PDS030_XCEED30HR = &device_creator; //------------------------------------------------- // machine_config_additions - device-specific // machine configurations //------------------------------------------------- machine_config_constructor nubus_xceed30hr_device::device_mconfig_additions() const { return MACHINE_CONFIG_NAME( xceed30hr ); } //------------------------------------------------- // rom_region - device-specific ROM region //------------------------------------------------- const rom_entry *nubus_xceed30hr_device::device_rom_region() const { return ROM_NAME( xceed30hr ); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // nubus_xceed30hr_device - constructor //------------------------------------------------- nubus_xceed30hr_device::nubus_xceed30hr_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, PDS030_XCEED30HR, "Micron/XCEED Technology Color 30HR", tag, owner, clock, "pd3_30hr", __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(XCEED30HR_SCREEN_NAME); m_screen_tag = m_assembled_tag.c_str(); } nubus_xceed30hr_device::nubus_xceed30hr_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(XCEED30HR_SCREEN_NAME); m_screen_tag = m_assembled_tag.c_str(); } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void nubus_xceed30hr_device::device_start() { UINT32 slotspace; // set_nubus_device makes m_slot valid set_nubus_device(); install_declaration_rom(this, XCEED30HR_ROM_REGION); slotspace = get_slotspace(); // printf("[xceed30hr %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_xceed30hr_device::vram_r), this), write32_delegate(FUNC(nubus_xceed30hr_device::vram_w), this)); m_nubus->install_device(slotspace+0x800000, slotspace+0xefffff, read32_delegate(FUNC(nubus_xceed30hr_device::xceed30hr_r), this), write32_delegate(FUNC(nubus_xceed30hr_device::xceed30hr_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_xceed30hr_device::device_reset() { m_count = 0; m_clutoffs = 0; m_vbl_disable = 1; m_mode = 0; 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_xceed30hr_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_xceed30hr_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) { UINT32 *scanline; int x, y; UINT8 pixels, *vram; vram = &m_vram[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>>7)&1]; *scanline++ = m_palette[(pixels>>6)&1]; *scanline++ = m_palette[(pixels>>5)&1]; *scanline++ = m_palette[(pixels>>4)&1]; *scanline++ = m_palette[(pixels>>3)&1]; *scanline++ = m_palette[(pixels>>2)&1]; *scanline++ = m_palette[(pixels>>1)&1]; *scanline++ = m_palette[pixels&1]; } } 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>>6)&3)]; *scanline++ = m_palette[((pixels>>4)&3)]; *scanline++ = m_palette[((pixels>>2)&3)]; *scanline++ = m_palette[(pixels&3)]; } } 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>>4)]; *scanline++ = m_palette[(pixels&0xf)]; } } 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; default: fatalerror("xceed30hr: unknown video mode %d\n", m_mode); } return 0; } WRITE32_MEMBER( nubus_xceed30hr_device::xceed30hr_w ) { switch (offset) { case 0x80000: // mode switch (data & 0xff000000) { case 0xfc000000: m_mode = 0; break; case 0xfd000000: m_mode = 1; break; case 0xfe000000: m_mode = 2; break; case 0xff000000: m_mode = 3; break; } break; case 0x80005: // ack VBL lower_slot_irq(); break; case 0x100000: // printf("%08x to DAC control (PC=%x)\n", data, space.device().safe_pc()); m_clutoffs = (data&0xff); m_count = 0; break; case 0x100001: // printf("%08x to DAC data (PC=%x)\n", data, space.device().safe_pc()); m_colors[m_count++] = (data & 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 0x100002: // VBL control if (data & 0x06000000) { m_vbl_disable = 0; lower_slot_irq(); } else { m_vbl_disable = 1; } break; default: // printf("xceed30hr_w: %08x @ %x, mask %08x (PC=%x)\n", data, offset, mem_mask, space.device().safe_pc()); break; } } READ32_MEMBER( nubus_xceed30hr_device::xceed30hr_r ) { // printf("xceed30hr_r: @ %x, mask %08x [PC=%x]\n", offset, mem_mask, machine().device("maincpu")->safe_pc()); if (offset == 0x80008) { m_toggle ^= 0x80; return m_toggle; } return 0; } WRITE32_MEMBER( nubus_xceed30hr_device::vram_w ) { COMBINE_DATA(&m_vram32[offset]); } READ32_MEMBER( nubus_xceed30hr_device::vram_r ) { return m_vram32[offset]; }