// license:BSD-3-Clause // copyright-holders:Ryan Holtz /*************************************************************************** Sun bwtwo monochrome video controller ***************************************************************************/ #include "emu.h" #include "bwtwo.h" #include "screen.h" DEFINE_DEVICE_TYPE(SBUS_BWTWO, sbus_bwtwo_device, "bwtwo", "Sun bwtwo SBus Video") void sbus_bwtwo_device::mem_map(address_map &map) { map(0x00000000, 0x00007fff).r(FUNC(sbus_bwtwo_device::rom_r)); map(0x00400000, 0x0040001f).rw(FUNC(sbus_bwtwo_device::regs_r), FUNC(sbus_bwtwo_device::regs_w)); map(0x00800000, 0x008fffff).rw(FUNC(sbus_bwtwo_device::vram_r), FUNC(sbus_bwtwo_device::vram_w)); } ROM_START( sbus_bwtwo ) ROM_REGION32_BE(0x8000, "prom", ROMREGION_ERASEFF) ROM_SYSTEM_BIOS(0, "1081", "P/N 525-1081-01") ROMX_LOAD( "bw2_525-1081-01.bin", 0x0000, 0x8000, CRC(8b70c8c7) SHA1(fd750ad2fd6efdde957f8b0f9abf962e14fe221a), ROM_BIOS(0) ) ROM_SYSTEM_BIOS(1, "1124", "P/N 525-1124-01") ROMX_LOAD( "bw2_525-1124-01.bin", 0x0000, 0x0800, CRC(e37a3314) SHA1(78761bd2369cb0c58ef1344c697a47d3a659d4bc), ROM_BIOS(1) ) ROM_END const tiny_rom_entry *sbus_bwtwo_device::device_rom_region() const { return ROM_NAME( sbus_bwtwo ); } void sbus_bwtwo_device::device_add_mconfig(machine_config &config) { screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER)); screen.set_screen_update(FUNC(sbus_bwtwo_device::screen_update)); screen.set_size(1152, 900); screen.set_visarea(0, 1152-1, 0, 900-1); screen.set_refresh_hz(72); } sbus_bwtwo_device::sbus_bwtwo_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, SBUS_BWTWO, tag, owner, clock) , device_sbus_card_interface(mconfig, *this) , m_rom(*this, "prom") , m_screen(*this, "screen") { } void sbus_bwtwo_device::device_start() { m_vram = std::make_unique(0x100000); save_pointer(NAME(m_vram), 0x100000); for (int i = 0; i < 0x100; i++) { for (int bit = 7; bit >= 0; bit--) { m_mono_lut[i][7 - bit] = BIT(i, bit) ? 0 : ~0; } } } void sbus_bwtwo_device::install_device() { m_sbus->install_device(m_base, m_base + 0x1ffffff, *this, &sbus_bwtwo_device::mem_map); } uint32_t sbus_bwtwo_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) { uint8_t *line = &m_vram[0]; for (int y = 0; y < 900; y++) { uint32_t *scanline = &bitmap.pix32(y); for (int x = 0; x < 1152/8; x++) { memcpy(scanline, m_mono_lut[*line], sizeof(uint32_t) * 8); line++; scanline += 8; } } return 0; } READ8_MEMBER(sbus_bwtwo_device::regs_r) { logerror("%s: regs_r (unimplemented): %08x\n", machine().describe_context(), 0x400000 + offset); return 0; } WRITE8_MEMBER(sbus_bwtwo_device::regs_w) { logerror("%s: regs_w (unimplemented): %08x = %02x\n", machine().describe_context(), 0x400000 + offset, data); } READ32_MEMBER(sbus_bwtwo_device::rom_r) { return ((uint32_t*)m_rom->base())[offset]; } READ8_MEMBER(sbus_bwtwo_device::vram_r) { return m_vram[offset]; } WRITE8_MEMBER(sbus_bwtwo_device::vram_w) { m_vram[offset] = data; }