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BizHawk
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alyosha-tas 2017-09-09 15:44:41 -04:00 committed by GitHub
parent ab3a246412
commit f42b8e2d7f
1 changed files with 23 additions and 24 deletions
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47
BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/PPU.cs
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@ -602,8 +602,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
// otherwise, just restart the whole process as if starting BG again
window_pre_render = true;
read_case = 4;
window_counter = 0;
}
window_counter = 0;
window_x_tile = (int)Math.Floor((float)(pixel_counter - (window_x - 7)) / 8);
@ -833,29 +833,16 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
}
else
{
if (window_started)
{
read_case = 4;
}
else
{
read_case = 0;
}
read_case = 0;
latch_new_data = true;
}
if (window_started) { window_counter++; }
break;
case 4: // read from window data
if ((window_counter % 2) == 0)
{
temp_fetch = window_y_tile * 32 + (window_x_tile + window_tile_inc) % 32;
tile_byte = LCDC.Bit(6) ? Core.BG_map_2[temp_fetch] : Core.BG_map_1[temp_fetch];
}
else
{
@ -863,19 +850,21 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
{
window_tile_inc++;
}
read_case = 6;
read_case = 5;
}
window_counter++;
break;
case 6: // read from tile graphics (for the window)
case 5: // read from tile graphics (for the window)
if ((window_counter % 2) == 0)
{
y_scroll_offset = (window_y_tile_inc) % 8;
if (LCDC.Bit(4))
{
tile_data[0] = Core.CHR_RAM[tile_byte * 16 + y_scroll_offset * 2];
}
else
{
@ -884,18 +873,18 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
{
tile_byte -= 256;
}
tile_data[0] = Core.CHR_RAM[0x1000 + tile_byte * 16 + y_scroll_offset * 2];
}
}
else
{
read_case = 7;
read_case = 6;
}
window_counter++;
break;
case 7: // read from tile graphics (for the window)
case 6: // read from tile graphics (for the window)
if ((window_counter % 2) == 0)
{
y_scroll_offset = (window_y_tile_inc) % 8;
@ -934,18 +923,29 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
}
else
{
read_case = 3;
read_case = 7;
}
}
window_counter++;
break;
case 7: // read from sprite data
if ((window_counter % 2) == 0)
{
// nothing to do if not fetching
}
else
{
read_case = 4;
latch_new_data = true;
}
window_counter++;
break;
case 8: // done reading, we are now in phase 0
pre_render = true;
// the other interrupts appear to be delayed by 1 CPU cycle, so do the same here
if (hbl_countdown > 0)
{
@ -966,7 +966,6 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
break;
}
internal_cycle++;
}