mame/src/emu/bus/nubus/nubus_specpdq.c
2014-04-07 06:04:18 +00:00

490 lines
13 KiB
C

/***************************************************************************
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 "nubus_specpdq.h"
#define SPECPDQ_SCREEN_NAME "specpdq_screen"
#define SPECPDQ_ROM_REGION "specpdq_rom"
#define VRAM_SIZE (0x400000)
MACHINE_CONFIG_FRAGMENT( specpdq )
MCFG_SCREEN_ADD( SPECPDQ_SCREEN_NAME, RASTER)
MCFG_SCREEN_UPDATE_DEVICE(DEVICE_SELF, nubus_specpdq_device, screen_update)
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)
MCFG_PALETTE_ADD("palette", 256)
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, "nb_spdq", __FILE__),
device_video_interface(mconfig, *this),
device_nubus_card_interface(mconfig, *this),
m_assembled_tag(tag, ":", SPECPDQ_SCREEN_NAME),
m_palette(*this, "palette")
{
m_screen_tag = m_assembled_tag;
}
nubus_specpdq_device::nubus_specpdq_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(tag, ":", SPECPDQ_SCREEN_NAME),
m_palette(*this, "palette")
{
m_screen_tag = m_assembled_tag;
}
//-------------------------------------------------
// 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.resize(VRAM_SIZE);
m_vram32 = (UINT32 *)&m_vram[0];
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_timer->adjust(m_screen->time_until_pos(843, 0), 0);
}
//-------------------------------------------------
// 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_val, 0, sizeof(m_palette_val));
m_palette_val[0] = rgb_t(255, 255, 255);
m_palette_val[0x80] = rgb_t(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
***************************************************************************/
UINT32 nubus_specpdq_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
vram = m_vram + 0x9000;
switch (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++ = m_palette_val[(pixels&0x80)];
*scanline++ = m_palette_val[((pixels<<1)&0x80)];
*scanline++ = m_palette_val[((pixels<<2)&0x80)];
*scanline++ = m_palette_val[((pixels<<3)&0x80)];
*scanline++ = m_palette_val[((pixels<<4)&0x80)];
*scanline++ = m_palette_val[((pixels<<5)&0x80)];
*scanline++ = m_palette_val[((pixels<<6)&0x80)];
*scanline++ = m_palette_val[((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++ = m_palette_val[(pixels&0xc0)];
*scanline++ = m_palette_val[((pixels<<2)&0xc0)];
*scanline++ = m_palette_val[((pixels<<4)&0xc0)];
*scanline++ = m_palette_val[((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++ = m_palette_val[(pixels&0xf0)];
*scanline++ = m_palette_val[((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++ = m_palette_val[pixels];
}
}
break;
default:
fatalerror("specpdq: unknown video mode %d\n", 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, space.device().safe_pc());
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], space.device().safe_pc() );
m_palette->set_pen_color(m_clutoffs, rgb_t(m_colors[0], m_colors[1], m_colors[2]));
m_palette_val[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;
// 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, space.device().safe_pc());
break;
case 0x182008:
// printf("%08x (%d) to blitter ctrl 2 (PC=%x)\n", data^0xffffffff, data^0xffffffff, space.device().safe_pc());
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, space.device().safe_pc());
m_width = data ^ 0xffffffff;
break;
case 0x18200b:
// printf("%08x (%d) to blitter ctrl 4 (PC=%x)\n", data^0xffffffff, data^0xffffffff, space.device().safe_pc());
m_height = (data ^ 0xffffffff) & 0xffff;
break;
case 0x18200a:
data ^= 0xffffffff;
// printf("%08x to blitter ctrl 5 (PC=%x)\n", data, space.device().safe_pc());
m_vram_src = data>>2;
break;
case 0x182009:
data ^= 0xffffffff;
// printf("%08x to blitter ctrl 6 (PC=%x)\n", data, space.device().safe_pc());
m_vram_addr = data>>2;
break;
case 0x182007:
data ^= 0xffffffff;
// printf("%08x to blitter ctrl 7 (PC=%x)\n", data, space.device().safe_pc());
// 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, space.device().safe_pc());
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, space.device().safe_pc());
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;
}