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Diffstat (limited to 'src/mess/video/nubus_specpdq.c')
-rw-r--r--src/mess/video/nubus_specpdq.c490
1 files changed, 490 insertions, 0 deletions
diff --git a/src/mess/video/nubus_specpdq.c b/src/mess/video/nubus_specpdq.c
new file mode 100644
index 00000000000..820e54eb098
--- /dev/null
+++ b/src/mess/video/nubus_specpdq.c
@@ -0,0 +1,490 @@
+/***************************************************************************
+
+ SuperMac Spectrum PDQ video card
+
+ Accelerated only in 256 color mode. Accleration is not yet emulated
+ properly (pattern fill works but has glitches). Use in B&W or 16 colors
+ for full functionality right now.
+
+ blitter info:
+
+ ctrl 1 = ?
+ ctrl 2 = low 3 bits of Y position in bits 3-5, low 3 bits of X position in bits 0-2
+ ctrl 3 = width
+ ctrl 4 = height
+ ctrl 5 = ?
+ ctrl 6 = VRAM offset * 4
+ ctrl 7 = command/execute (00000002 for pattern fill, 00000100 for copy)
+
+ Busy flag at Fs800000 (bit 8)
+
+ There is 256 bytes of pattern RAM arranged as 32 pixels horizontally by 8
+ vertically.
+
+***************************************************************************/
+
+#include "emu.h"
+#include "video/nubus_specpdq.h"
+
+#define SPECPDQ_SCREEN_NAME "specpdq_screen"
+#define SPECPDQ_ROM_REGION "specpdq_rom"
+
+#define VRAM_SIZE (0x400000)
+
+static SCREEN_UPDATE_RGB32( specpdq );
+
+MACHINE_CONFIG_FRAGMENT( specpdq )
+ MCFG_SCREEN_ADD( SPECPDQ_SCREEN_NAME, RASTER)
+ MCFG_SCREEN_UPDATE_STATIC(specpdq)
+ MCFG_SCREEN_RAW_PARAMS(25175000, 800, 0, 640, 525, 0, 480)
+ MCFG_SCREEN_SIZE(1280,1024)
+ MCFG_SCREEN_VISIBLE_AREA(0, 1152-1, 0, 844-1)
+MACHINE_CONFIG_END
+
+ROM_START( specpdq )
+ ROM_REGION(0x10000, SPECPDQ_ROM_REGION, 0)
+ ROM_LOAD( "specpdq.bin", 0x000000, 0x010000, CRC(82a35f78) SHA1(9511c2df47140f4279196d3b8836b53429879dd9) )
+ROM_END
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+const device_type NUBUS_SPECPDQ = &device_creator<nubus_specpdq_device>;
+
+
+//-------------------------------------------------
+// machine_config_additions - device-specific
+// machine configurations
+//-------------------------------------------------
+
+machine_config_constructor nubus_specpdq_device::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( specpdq );
+}
+
+//-------------------------------------------------
+// rom_region - device-specific ROM region
+//-------------------------------------------------
+
+const rom_entry *nubus_specpdq_device::device_rom_region() const
+{
+ return ROM_NAME( specpdq );
+}
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// nubus_specpdq_device - constructor
+//-------------------------------------------------
+
+nubus_specpdq_device::nubus_specpdq_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, NUBUS_SPECPDQ, "SuperMac Spectrum PDQ video card", tag, owner, clock),
+ device_nubus_card_interface(mconfig, *this)
+{
+ m_shortname = "nb_spdq";
+}
+
+nubus_specpdq_device::nubus_specpdq_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, type, name, tag, owner, clock),
+ device_nubus_card_interface(mconfig, *this)
+{
+ m_shortname = "nb_spdq";
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void nubus_specpdq_device::device_start()
+{
+ UINT32 slotspace;
+
+ // set_nubus_device makes m_slot valid
+ set_nubus_device();
+ install_declaration_rom(this, SPECPDQ_ROM_REGION);
+
+ slotspace = get_slotspace();
+
+// printf("[specpdq %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_specpdq_device::vram_r), this), write32_delegate(FUNC(nubus_specpdq_device::vram_w), this));
+ m_nubus->install_device(slotspace+0x400000, slotspace+0xfbffff, read32_delegate(FUNC(nubus_specpdq_device::specpdq_r), this), write32_delegate(FUNC(nubus_specpdq_device::specpdq_w), this));
+
+ m_timer = timer_alloc(0, NULL);
+ m_screen = NULL; // can we look this up now?
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void nubus_specpdq_device::device_reset()
+{
+ m_count = 0;
+ m_clutoffs = 0;
+ m_vbl_disable = 1;
+ m_mode = 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_specpdq_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(843, 0), 0);
+}
+
+/***************************************************************************
+
+ Spectrum 24 PDQ section
+
+***************************************************************************/
+
+static SCREEN_UPDATE_RGB32( specpdq )
+{
+ UINT32 *scanline;
+ int x, y;
+ nubus_specpdq_device *card = downcast<nubus_specpdq_device *>(screen.owner());
+ UINT8 pixels, *vram;
+
+ // first time? kick off the VBL timer
+ if (!card->m_screen)
+ {
+ card->m_screen = &screen;
+ card->m_timer->adjust(card->m_screen->time_until_pos(843, 0), 0);
+ }
+ vram = card->m_vram + 0x9000;
+
+ switch (card->m_mode)
+ {
+ case 0: // 1 bpp
+ for (y = 0; y < 844; y++)
+ {
+ scanline = &bitmap.pix32(y);
+ for (x = 0; x < 1152/8; x++)
+ {
+ pixels = vram[(y * 512) + (BYTE4_XOR_BE(x))];
+
+ *scanline++ = card->m_palette[(pixels&0x80)];
+ *scanline++ = card->m_palette[((pixels<<1)&0x80)];
+ *scanline++ = card->m_palette[((pixels<<2)&0x80)];
+ *scanline++ = card->m_palette[((pixels<<3)&0x80)];
+ *scanline++ = card->m_palette[((pixels<<4)&0x80)];
+ *scanline++ = card->m_palette[((pixels<<5)&0x80)];
+ *scanline++ = card->m_palette[((pixels<<6)&0x80)];
+ *scanline++ = card->m_palette[((pixels<<7)&0x80)];
+ }
+ }
+ break;
+
+ case 1: // 2 bpp
+ for (y = 0; y < 844; y++)
+ {
+ scanline = &bitmap.pix32(y);
+ for (x = 0; x < 1152/4; x++)
+ {
+ pixels = vram[(y * 512) + (BYTE4_XOR_BE(x))];
+
+ *scanline++ = card->m_palette[(pixels&0xc0)];
+ *scanline++ = card->m_palette[((pixels<<2)&0xc0)];
+ *scanline++ = card->m_palette[((pixels<<4)&0xc0)];
+ *scanline++ = card->m_palette[((pixels<<6)&0xc0)];
+ }
+ }
+ break;
+
+ case 2: // 4 bpp
+ for (y = 0; y < 844; y++)
+ {
+ scanline = &bitmap.pix32(y);
+
+ for (x = 0; x < 1152/2; x++)
+ {
+ pixels = vram[(y * 1024) + (BYTE4_XOR_BE(x))];
+
+ *scanline++ = card->m_palette[(pixels&0xf0)];
+ *scanline++ = card->m_palette[((pixels<<4)&0xf0)];
+ }
+ }
+ break;
+
+ case 3: // 8 bpp
+ for (y = 0; y < 844; y++)
+ {
+ scanline = &bitmap.pix32(y);
+
+ for (x = 0; x < 1152; x++)
+ {
+ pixels = vram[(y * 1152) + (BYTE4_XOR_BE(x))];
+ *scanline++ = card->m_palette[pixels];
+ }
+ }
+ break;
+
+ default:
+ fatalerror("specpdq: unknown video mode %d", card->m_mode);
+ break;
+
+ }
+ return 0;
+}
+
+WRITE32_MEMBER( nubus_specpdq_device::specpdq_w )
+{
+ if (offset >= 0xc0000 && offset < 0x100000)
+ {
+ COMBINE_DATA(&m_7xxxxx_regs[offset-0xc0000]);
+ }
+
+ switch (offset)
+ {
+ case 0xc0054: // mode 1
+// printf("%x to mode1\n", data);
+ break;
+
+ case 0xc005c: // interrupt control
+ if (!(data & 0x8000))
+ {
+ m_vbl_disable = 1;
+ }
+ else
+ {
+ m_vbl_disable = 0;
+ lower_slot_irq();
+ }
+ break;
+
+ case 0xc005e: // not sure, interrupt related?
+ break;
+
+ case 0xc007a:
+// printf("%x to mode2\n", data);
+
+ switch (data)
+ {
+ case 0xff7fffff:
+ m_mode = 0;
+ break;
+
+ case 0xfeffffff:
+ m_mode = 2;
+ break;
+
+ case 0xfedfffff:
+ m_mode = 3;
+ break;
+ }
+
+// printf("m_mode = %d\n", m_mode);
+ break;
+
+ case 0x120000: // DAC address
+// printf("%08x to DAC control (PC=%x)\n", data, cpu_get_pc(&space.device()));
+ m_clutoffs = ((data>>8)&0xff)^0xff;
+ break;
+
+ case 0x120001: // DAC data
+ m_colors[m_count++] = ((data>>8)&0xff)^0xff;
+
+ if (m_count == 3)
+ {
+// printf("RAMDAC: color %d = %02x %02x %02x (PC=%x)\n", m_clutoffs, m_colors[0], m_colors[1], m_colors[2], cpu_get_pc(&space.device()) );
+ palette_set_color(space.machine(), m_clutoffs, MAKE_RGB(m_colors[0], m_colors[1], m_colors[2]));
+ m_palette[m_clutoffs] = MAKE_RGB(m_colors[0], m_colors[1], m_colors[2]);
+ m_clutoffs++;
+ if (m_clutoffs > 255)
+ {
+ m_clutoffs = 0;
+ }
+ m_count = 0;
+ }
+ break;
+
+ // blitter texture? pattern? 256 pixels worth at 8bpp
+ case 0x181000:
+ case 0x181001:
+ case 0x181002:
+ case 0x181003:
+ case 0x181004:
+ case 0x181005:
+ case 0x181006:
+ case 0x181007:
+ case 0x181008:
+ case 0x181009:
+ case 0x18100a:
+ case 0x18100b:
+ case 0x18100c:
+ case 0x18100d:
+ case 0x18100e:
+ case 0x18100f:
+ case 0x181010:
+ case 0x181011:
+ case 0x181012:
+ case 0x181013:
+ case 0x181014:
+ case 0x181015:
+ case 0x181016:
+ case 0x181017:
+ case 0x181018:
+ case 0x181019:
+ case 0x18101a:
+ case 0x18101b:
+ case 0x18101c:
+ case 0x18101d:
+ case 0x18101e:
+ case 0x18101f:
+ case 0x181020:
+ case 0x181021:
+ case 0x181022:
+ case 0x181023:
+ case 0x181024:
+ case 0x181025:
+ case 0x181026:
+ case 0x181027:
+ case 0x181028:
+ case 0x181029:
+ case 0x18102a:
+ case 0x18102b:
+ case 0x18102c:
+ case 0x18102d:
+ case 0x18102e:
+ case 0x18102f:
+ case 0x181030:
+ case 0x181031:
+ case 0x181032:
+ case 0x181033:
+ case 0x181034:
+ case 0x181035:
+ case 0x181036:
+ case 0x181037:
+ case 0x181038:
+ case 0x181039:
+ case 0x18103a:
+ case 0x18103b:
+ case 0x18103c:
+ case 0x18103d:
+ case 0x18103e:
+ case 0x18103f:
+// printf("Pattern %08x @ %x\n", data ^ 0xffffffff, offset);
+ m_fillbytes[((offset&0x3f)*4)] = ((data>>24) & 0xff) ^ 0xff;
+ m_fillbytes[((offset&0x3f)*4)+1] = ((data>>16) & 0xff) ^ 0xff;
+ m_fillbytes[((offset&0x3f)*4)+2] = ((data>>8) & 0xff) ^ 0xff;
+ m_fillbytes[((offset&0x3f)*4)+3] = (data& 0xff) ^ 0xff;
+ break;
+
+ // blitter control
+ case 0x182006:
+// printf("%08x (%d) to blitter ctrl 1 (PC=%x)\n", data^0xffffffff, data^0xffffffff, cpu_get_pc(&space.device()));
+ break;
+
+ case 0x182008:
+// printf("%08x (%d) to blitter ctrl 2 (PC=%x)\n", data^0xffffffff, data^0xffffffff, cpu_get_pc(&space.device()));
+ m_patofsx = (data ^ 0xffffffff) & 7;
+ m_patofsy = ((data ^ 0xffffffff)>>3) & 7;
+ break;
+
+ case 0x18200e:
+// printf("%08x (%d) to blitter ctrl 3 (PC=%x)\n", data^0xffffffff, data^0xffffffff, cpu_get_pc(&space.device()));
+ m_width = data ^ 0xffffffff;
+ break;
+
+ case 0x18200b:
+// printf("%08x (%d) to blitter ctrl 4 (PC=%x)\n", data^0xffffffff, data^0xffffffff, cpu_get_pc(&space.device()));
+ m_height = (data ^ 0xffffffff) & 0xffff;
+ break;
+
+ case 0x18200a:
+ data ^= 0xffffffff;
+// printf("%08x to blitter ctrl 5 (PC=%x)\n", data, cpu_get_pc(&space.device()));
+ m_vram_src = data>>2;
+ break;
+
+ case 0x182009:
+ data ^= 0xffffffff;
+// printf("%08x to blitter ctrl 6 (PC=%x)\n", data, cpu_get_pc(&space.device()));
+ m_vram_addr = data>>2;
+ break;
+
+ case 0x182007:
+ data ^= 0xffffffff;
+// printf("%08x to blitter ctrl 7 (PC=%x)\n", data, cpu_get_pc(&space.device()));
+
+ // fill rectangle
+ if (data == 2)
+ {
+ int x, y;
+ UINT8 *vram = m_vram + m_vram_addr + m_patofsx; // m_vram_addr is missing the low 2 bits, we add them back here
+
+// printf("Fill rectangle with %02x %02x %02x %02x, width %d height %d\n", m_fillbytes[0], m_fillbytes[1], m_fillbytes[2], m_fillbytes[3], m_width, m_height);
+
+ for (y = 0; y < m_height; y++)
+ {
+ for (x = 0; x < m_width; x++)
+ {
+ vram[(y * 1152)+x] = m_fillbytes[((m_patofsx + x) & 0x1f)+(((m_patofsy + y) & 0x7)*32)];
+ }
+ }
+ }
+ else if ((data == 0x101) || (data == 0x100))
+ {
+ int x, y;
+ UINT8 *vram = m_vram + m_vram_addr;
+ UINT8 *vramsrc = m_vram + m_vram_src;
+
+// printf("Copy rectangle, width %d height %d src %x dst %x\n", m_width, m_height, m_vram_addr, m_vram_src);
+
+ for (y = 0; y < m_height; y++)
+ {
+ for (x = 0; x < m_width; x++)
+ {
+ vram[(y * 1152)+x] = vramsrc[(y * 1152)+x];
+ }
+ }
+ }
+ else
+ {
+ printf("Unknown blitter command %08x\n", data);
+ }
+ break;
+
+ default:
+// printf("specpdq_w: %08x @ %x (mask %08x PC=%x)\n", data^0xffffffff, offset, mem_mask, cpu_get_pc(&space.device()));
+ break;
+ }
+}
+
+READ32_MEMBER( nubus_specpdq_device::specpdq_r )
+{
+// if (offset != 0xc005c && offset != 0xc005e) printf("specpdq_r: @ %x (mask %08x PC=%x)\n", offset, mem_mask, cpu_get_pc(&space.device()));
+
+ if (offset >= 0xc0000 && offset < 0x100000)
+ {
+ return m_7xxxxx_regs[offset-0xc0000];
+ }
+
+ return 0;
+}
+
+WRITE32_MEMBER( nubus_specpdq_device::vram_w )
+{
+ data ^= 0xffffffff;
+ COMBINE_DATA(&m_vram32[offset]);
+}
+
+READ32_MEMBER( nubus_specpdq_device::vram_r )
+{
+ return m_vram32[offset] ^ 0xffffffff;
+}