/*************************************************************************** Sigma Designs L-View card ***************************************************************************/ #include "emu.h" #include "video/pds30_sigmalview.h" #define LVIEW_SCREEN_NAME "lview_screen" #define LVIEW_ROM_REGION "lview_rom" #define VRAM_SIZE (0x80000) // 512K? MACHINE_CONFIG_FRAGMENT( lview ) MCFG_SCREEN_ADD( LVIEW_SCREEN_NAME, RASTER) MCFG_SCREEN_UPDATE_DEVICE(DEVICE_SELF, nubus_lview_device, screen_update) MCFG_SCREEN_SIZE(832,600) MCFG_SCREEN_REFRESH_RATE(70) MCFG_SCREEN_VISIBLE_AREA(0, 832-1, 0, 600-1) MACHINE_CONFIG_END 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 //************************************************************************** const device_type PDS030_LVIEW = &device_creator; //------------------------------------------------- // machine_config_additions - device-specific // machine configurations //------------------------------------------------- machine_config_constructor nubus_lview_device::device_mconfig_additions() const { return MACHINE_CONFIG_NAME( lview ); } //------------------------------------------------- // rom_region - device-specific ROM region //------------------------------------------------- const 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, UINT32 clock) : device_t(mconfig, PDS030_LVIEW, "Sigma Designs L-View", tag, owner, clock, "pd3_lviw", __FILE__), device_nubus_card_interface(mconfig, *this) { } nubus_lview_device::nubus_lview_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_nubus_card_interface(mconfig, *this) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void nubus_lview_device::device_start() { UINT32 slotspace; // set_nubus_device makes m_slot valid set_nubus_device(); install_declaration_rom(this, LVIEW_ROM_REGION); slotspace = get_slotspace(); // printf("[lview %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_lview_device::vram_r), this), write32_delegate(FUNC(nubus_lview_device::vram_w), this)); m_nubus->install_device(slotspace+0x900000, slotspace+VRAM_SIZE-1+0x900000, read32_delegate(FUNC(nubus_lview_device::vram_r), this), write32_delegate(FUNC(nubus_lview_device::vram_w), this)); m_nubus->install_device(slotspace+0xb0000, slotspace+0xbffff, read32_delegate(FUNC(nubus_lview_device::lview_r), this), write32_delegate(FUNC(nubus_lview_device::lview_w), this)); m_timer = timer_alloc(0, NULL); m_screen = NULL; // can we look this up now? } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void nubus_lview_device::device_reset() { m_vbl_disable = 1; m_protstate = 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_lview_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(599, 0), 0); } /*************************************************************************** CB264 section ***************************************************************************/ UINT32 nubus_lview_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) { UINT32 *scanline; int x, y; UINT8 pixels, *vram; // first time? kick off the VBL timer if (!m_screen) { m_screen = &screen; m_timer->adjust(m_screen->time_until_pos(599, 0), 0); } vram = m_vram + 0x20; for (y = 0; y < 600; y++) { scanline = &bitmap.pix32(y); for (x = 0; x < 832/8; x++) { pixels = vram[(y * (832/8)) + (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)]; } } return 0; } READ32_MEMBER( nubus_lview_device::lview_r ) { UINT32 rv = 0; // printf("prot_r: @ %x, mask %08x [PC=%x state %d]\n", offset, mem_mask, machine().device("maincpu")->safe_pc(), m_protstate); if ((m_protstate == 1) || (m_protstate == 10) || (machine().device("maincpu")->safe_pc() == 0x5aac)) { rv = 0x02020202; } if (m_protstate == 8) { rv = 0x01010101; } m_protstate++; return rv; } WRITE32_MEMBER( nubus_lview_device::lview_w ) { // if (offset != 0x7a && offset != 0x3ffb) printf("prot_w: %08x @ %x, mask %08x (PC=%x)\n", data, offset, mem_mask, space.device().safe_pc()); if (offset == 0x7a) { if (data == 1) { m_vbl_disable = 0; lower_slot_irq(); } else { m_vbl_disable = 1; } } } WRITE32_MEMBER( nubus_lview_device::vram_w ) { COMBINE_DATA(&m_vram32[offset]); } READ32_MEMBER( nubus_lview_device::vram_r ) { return m_vram32[offset]; }