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Diffstat (limited to 'src/devices/bus/nubus/pds30_mc30.c')
-rw-r--r--src/devices/bus/nubus/pds30_mc30.c336
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];
+}