diff options
Diffstat (limited to 'src/devices/bus/nubus/pds30_mc30.c')
-rw-r--r-- | src/devices/bus/nubus/pds30_mc30.c | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/src/devices/bus/nubus/pds30_mc30.c b/src/devices/bus/nubus/pds30_mc30.c new file mode 100644 index 00000000000..ddc063bbb8f --- /dev/null +++ b/src/devices/bus/nubus/pds30_mc30.c @@ -0,0 +1,336 @@ +// license:BSD-3-Clause +// copyright-holders:R. Belmont +/*************************************************************************** + + Micron/XCEED Technologies MacroColor 30 + + Similar to the 30HR, but registers are rearranged and 24bpp support + was added. + +***************************************************************************/ + +#include "emu.h" +#include "pds30_mc30.h" + +#define XCEEDMC30_SCREEN_NAME "x30hr_screen" +#define XCEEDMC30_ROM_REGION "x30hr_rom" + +#define VRAM_SIZE (0x200000) // 16 42C4256 256Kx4 VRAMs on the board = 2MB + +MACHINE_CONFIG_FRAGMENT( xceedmc30 ) + MCFG_SCREEN_ADD( XCEEDMC30_SCREEN_NAME, RASTER) + MCFG_SCREEN_UPDATE_DEVICE(DEVICE_SELF, nubus_xceedmc30_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( xceedmc30 ) + ROM_REGION(0x8000, XCEEDMC30_ROM_REGION, 0) + ROM_LOAD( "0390.bin", 0x000000, 0x008000, CRC(adea7a18) SHA1(9141eb1a0e5061e0409d65a89b4eaeb119ee4ffb) ) +ROM_END + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +const device_type PDS030_XCEEDMC30 = &device_creator<nubus_xceedmc30_device>; + + +//------------------------------------------------- +// machine_config_additions - device-specific +// machine configurations +//------------------------------------------------- + +machine_config_constructor nubus_xceedmc30_device::device_mconfig_additions() const +{ + return MACHINE_CONFIG_NAME( xceedmc30 ); +} + +//------------------------------------------------- +// rom_region - device-specific ROM region +//------------------------------------------------- + +const rom_entry *nubus_xceedmc30_device::device_rom_region() const +{ + return ROM_NAME( xceedmc30 ); +} + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// nubus_xceedmc30_device - constructor +//------------------------------------------------- + +nubus_xceedmc30_device::nubus_xceedmc30_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, PDS030_XCEEDMC30, "Micron/XCEED Technology MacroColor 30", tag, owner, clock, "pd3_mclr", __FILE__), + device_video_interface(mconfig, *this), + device_nubus_card_interface(mconfig, *this) +{ + m_assembled_tag = std::string(tag).append(":").append(XCEEDMC30_SCREEN_NAME); + m_screen_tag = m_assembled_tag.c_str(); +} + +nubus_xceedmc30_device::nubus_xceedmc30_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_assembled_tag = std::string(tag).append(":").append(XCEEDMC30_SCREEN_NAME); + m_screen_tag = m_assembled_tag.c_str(); +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void nubus_xceedmc30_device::device_start() +{ + UINT32 slotspace; + + // set_nubus_device makes m_slot valid + set_nubus_device(); + install_declaration_rom(this, XCEEDMC30_ROM_REGION); + + slotspace = get_slotspace(); + +// printf("[xceedmc30 %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_xceedmc30_device::vram_r), this), write32_delegate(FUNC(nubus_xceedmc30_device::vram_w), this)); + m_nubus->install_device(slotspace+0x800000, slotspace+0xefffff, read32_delegate(FUNC(nubus_xceedmc30_device::xceedmc30_r), this), write32_delegate(FUNC(nubus_xceedmc30_device::xceedmc30_w), this)); + + m_timer = timer_alloc(0, NULL); + m_timer->adjust(m_screen->time_until_pos(479, 0), 0); +} + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void nubus_xceedmc30_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_xceedmc30_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_xceedmc30_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) +{ + UINT32 *scanline; + int x, y; + UINT8 pixels, *vram; + + vram = &m_vram[4*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; + + case 4: // 24 bpp + { + UINT32 *vram32 = (UINT32 *)vram; + 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("xceedmc30: unknown video mode %d\n", m_mode); + } + return 0; +} + +WRITE32_MEMBER( nubus_xceedmc30_device::xceedmc30_w ) +{ + switch (offset) + { + case 0x80000: // mode + switch (data & 0xff000000) + { + case 0xfb000000: + m_mode = 0; + break; + + case 0xfa000000: + m_mode = 1; + break; + + case 0xf9000000: + m_mode = 2; + break; + + case 0xf8000000: + m_mode = 3; + break; + + case 0xff000000: + m_mode = 4; + 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>>24) & 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 0x80002: // VBL control + if (data == 0xdcef0000) + { + m_vbl_disable = 0; + lower_slot_irq(); + } + else + { + m_vbl_disable = 1; + } + break; + + default: +// printf("xceedmc30_w: %08x @ %x, mask %08x (PC=%x)\n", data, offset, mem_mask, space.device().safe_pc()); + break; + } +} + +READ32_MEMBER( nubus_xceedmc30_device::xceedmc30_r ) +{ +// printf("xceedmc30_r: @ %x, mask %08x [PC=%x]\n", offset, mem_mask, machine().device("maincpu")->safe_pc()); + if (offset == 0x80008) + { + m_toggle ^= 0x04; + return m_toggle; + } + + return 0; +} + +WRITE32_MEMBER( nubus_xceedmc30_device::vram_w ) +{ + COMBINE_DATA(&m_vram32[offset]); +} + +READ32_MEMBER( nubus_xceedmc30_device::vram_r ) +{ + return m_vram32[offset]; +} |