void Read_bgdata(ref BGDataRecord bgdata)
{
for (int i = 0; i < 8; i++)
{
Read_bgdata(i, ref bgdata);
}
}
void Read_bgdata(ref BGDataRecord bgdata)
{
for (int i = 0; i < 8; i++)
{
Read_bgdata(i, ref bgdata);
runppu(1);
if (PPUON && i == 6)
{
ppu_was_on = true;
}
if (PPUON && i == 7)
{
if (!race_2006)
{
ppur.increment_hsc();
}
if (ppur.status.cycle == 256 && !race_2006)
{
ppur.increment_vs();
}
ppu_was_on = false;
}
}
}
void Read_bgdata(int cycle, ref BGDataRecord bgdata)
{
switch (cycle)
{
case 0:
ppu_addr_temp = ppur.get_ntread();
bgdata.nt = ppubus_read(ppu_addr_temp, true);
runppu(1);
break;
case 1:
runppu(1);
break;
case 2:
{
ppu_addr_temp = ppur.get_atread();
byte at = ppubus_read(ppu_addr_temp, true);
//modify at to get appropriate palette shift
if ((ppur.vt & 2) != 0) at >>= 4;
if ((ppur.ht & 2) != 0) at >>= 2;
at &= 0x03;
at <<= 2;
bgdata.at = at;
//horizontal scroll clocked at cycle 3 and then
//vertical scroll at 251
runppu(1);
if (reg_2001.PPUON)
{
ppur.increment_hsc();
if (ppur.status.cycle == 251)
ppur.increment_vs();
}
break;
}
case 3:
runppu(1);
break;
case 4:
ppu_addr_temp = ppur.get_ptread(bgdata.nt);
bgdata.pt_0 = ppubus_read(ppu_addr_temp, true);
runppu(1);
break;
case 5:
runppu(1);
break;
case 6:
ppu_addr_temp |= 8;
bgdata.pt_1 = ppubus_read(ppu_addr_temp, true);
runppu(1);
break;
case 7:
runppu(1);
break;
} //switch(cycle)
}
void Read_bgdata(int cycle, ref BGDataRecord bgdata)
{
switch (cycle)
{
case 0:
ppu_addr_temp = ppur.get_ntread();
bgdata.nt = ppubus_read(ppu_addr_temp, true, true);
break;
case 1:
break;
case 2:
{
ppu_addr_temp = ppur.get_atread();
byte at = ppubus_read(ppu_addr_temp, true, true);
//modify at to get appropriate palette shift
if ((ppur.vt & 2) != 0)
{
at >>= 4;
}
if ((ppur.ht & 2) != 0)
{
at >>= 2;
}
at &= 0x03;
at <<= 2;
bgdata.at = at;
break;
}
case 3:
break;
case 4:
ppu_addr_temp = ppur.get_ptread(bgdata.nt);
bgdata.pt_0 = ppubus_read(ppu_addr_temp, true, true);
break;
case 5:
break;
case 6:
ppu_addr_temp |= 8;
bgdata.pt_1 = ppubus_read(ppu_addr_temp, true, true);
break;
case 7:
break;
} //switch(cycle)
}
void Read_bgdata(int cycle, ref BGDataRecord bgdata)
{
switch (cycle)
{
case 0:
ppu_addr_temp = ppur.get_ntread();
bgdata.nt = ppubus_read(ppu_addr_temp, true, true);
runppu(1);
break;
case 1:
runppu(1);
break;
case 2:
{
ppu_addr_temp = ppur.get_atread();
byte at = ppubus_read(ppu_addr_temp, true, true);
//modify at to get appropriate palette shift
if ((ppur.vt & 2) != 0)
{
at >>= 4;
}
if ((ppur.ht & 2) != 0)
{
at >>= 2;
}
at &= 0x03;
at <<= 2;
bgdata.at = at;
//horizontal scroll clocked at cycle 3 and then
//vertical scroll at 251
runppu(1);
if (reg_2001.PPUON)
{
ppur.increment_hsc();
if (ppur.status.cycle == 251)
{
ppur.increment_vs();
}
}
break;
}
case 3:
runppu(1);
break;
case 4:
ppu_addr_temp = ppur.get_ptread(bgdata.nt);
bgdata.pt_0 = ppubus_read(ppu_addr_temp, true, true);
runppu(1);
break;
case 5:
runppu(1);
break;
case 6:
ppu_addr_temp |= 8;
bgdata.pt_1 = ppubus_read(ppu_addr_temp, true, true);
runppu(1);
break;
case 7:
runppu(1);
break;
} //switch(cycle)
}
void Read_bgdata(ref BGDataRecord bgdata)
{
for (int i = 0; i < 8; i++)
Read_bgdata(i,ref bgdata);
}
