// license:BSD-3-Clause // copyright-holders:R. Belmont /*************************************************************************** Sigma Designs L-View card ***************************************************************************/ #include "emu.h" #include "pds30_sigmalview.h" #include "screen.h" #include #define LVIEW_SCREEN_NAME "lview_screen" #define LVIEW_ROM_REGION "lview_rom" #define VRAM_SIZE (0x80000) // 512K? ROM_START( lview ) ROM_REGION(0x4000, LVIEW_ROM_REGION, 0) ROM_LOAD( "lv_asi_4_00.bin", 0x000000, 0x004000, CRC(b806f875) SHA1(1e58593b1a8720193d1651b0d8a0d43e4e47563d) ) ROM_END //************************************************************************** // GLOBAL VARIABLES //************************************************************************** DEFINE_DEVICE_TYPE(PDS030_LVIEW, nubus_lview_device, "pd3_lviw", "Sigma Designs L-View") //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- void nubus_lview_device::device_add_mconfig(machine_config &config) { screen_device &screen(SCREEN(config, LVIEW_SCREEN_NAME, SCREEN_TYPE_RASTER)); screen.set_screen_update(FUNC(nubus_lview_device::screen_update)); screen.set_size(832, 600); screen.set_refresh_hz(70); screen.set_visarea(0, 832-1, 0, 600-1); } //------------------------------------------------- // rom_region - device-specific ROM region //------------------------------------------------- const tiny_rom_entry *nubus_lview_device::device_rom_region() const { return ROM_NAME( lview ); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // nubus_lview_device - constructor //------------------------------------------------- nubus_lview_device::nubus_lview_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) : nubus_lview_device(mconfig, PDS030_LVIEW, tag, owner, clock) { (void)m_toggle; } nubus_lview_device::nubus_lview_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, const XTAL &clock) : device_t(mconfig, type, tag, owner, clock), device_video_interface(mconfig, *this), device_nubus_card_interface(mconfig, *this), m_vbl_disable(0), m_toggle(0), m_timer(nullptr), m_protstate(0) { set_screen(*this, LVIEW_SCREEN_NAME); } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void nubus_lview_device::device_start() { uint32_t slotspace; install_declaration_rom(LVIEW_ROM_REGION); slotspace = get_slotspace(); // printf("[lview %p] slotspace = %x\n", this, slotspace); m_vram.resize(VRAM_SIZE / sizeof(uint32_t)); nubus().install_device(slotspace, slotspace+VRAM_SIZE-1, read32s_delegate(*this, FUNC(nubus_lview_device::vram_r)), write32s_delegate(*this, FUNC(nubus_lview_device::vram_w))); nubus().install_device(slotspace+0x900000, slotspace+VRAM_SIZE-1+0x900000, read32s_delegate(*this, FUNC(nubus_lview_device::vram_r)), write32s_delegate(*this, FUNC(nubus_lview_device::vram_w))); nubus().install_device(slotspace+0xb0000, slotspace+0xbffff, read32s_delegate(*this, FUNC(nubus_lview_device::lview_r)), write32s_delegate(*this, FUNC(nubus_lview_device::lview_w))); m_timer = timer_alloc(FUNC(nubus_lview_device::vbl_tick), this); m_timer->adjust(screen().time_until_pos(599, 0), 0); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void nubus_lview_device::device_reset() { m_vbl_disable = 1; m_protstate = 0; std::fill(m_vram.begin(), m_vram.end(), 0); memset(m_palette, 0, sizeof(m_palette)); m_palette[0] = rgb_t(255, 255, 255); m_palette[0x80] = rgb_t(0, 0, 0); } TIMER_CALLBACK_MEMBER(nubus_lview_device::vbl_tick) { if (!m_vbl_disable) { raise_slot_irq(); } m_timer->adjust(screen().time_until_pos(599, 0), 0); } /*************************************************************************** CB264 section ***************************************************************************/ uint32_t nubus_lview_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) { auto const vram8 = util::big_endian_cast(&m_vram[0]) + 0x20; for (int y = 0; y < 600; y++) { uint32_t *scanline = &bitmap.pix(y); for (int x = 0; x < 832/8; x++) { uint8_t const pixels = vram8[(y * (832/8)) + 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)]; } } return 0; } uint32_t nubus_lview_device::lview_r(offs_t offset, uint32_t mem_mask) { uint32_t rv = 0; // printf("%s prot_r: @ %x, mask %08x [state %d] [PC=%x]\n", machine().describe_context().c_str(), offset, mem_mask, m_protstate, machine().device("maincpu")->pc()); if ((m_protstate == 1) || (m_protstate == 10) || (m_protstate == 17) || (m_protstate == 20) || (m_protstate == 22)) { rv = 0x02020202; } if (m_protstate == 8) { rv = 0x01010101; } m_protstate++; return rv; } void nubus_lview_device::lview_w(offs_t offset, uint32_t data, uint32_t mem_mask) { // if (offset != 0x7a && offset != 0x3ffb) logerror("prot_w: %08x @ %x, mask %08x %s\n", data, offset, mem_mask, machine().describe_context()); if (offset == 0x7a) { if (data != 1) { m_vbl_disable = 0; lower_slot_irq(); } else { m_vbl_disable = 1; } } } void nubus_lview_device::vram_w(offs_t offset, uint32_t data, uint32_t mem_mask) { COMBINE_DATA(&m_vram[offset]); } uint32_t nubus_lview_device::vram_r(offs_t offset, uint32_t mem_mask) { return m_vram[offset]; }