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GBHawk: Initial sprite test pass

This commit is contained in:
alyosha-tas 2018-01-18 20:35:56 -05:00
parent 5bf7b060af
commit a98ebef674
1 changed files with 31 additions and 18 deletions
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49
BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/PPU.cs
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@ -60,6 +60,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
public int sprite_fetch_cycles;
public bool fetch_sprite;
public bool fetch_sprite_01;
public bool fetch_sprite_4;
public bool going_to_fetch;
public int sprite_fetch_counter;
public bool glitchy_eval;
@ -241,7 +242,6 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
cycle = 0;
LY += LY_inc;
//Console.WriteLine(Core.cpu.TotalExecutedCycles);
no_scan = false;
// here is where LY = LYC gets cleared (but only if LY isnt 0 as that's a special case
@ -589,6 +589,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
sl_use_index = 0;
fetch_sprite = false;
fetch_sprite_01 = false;
fetch_sprite_4 = false;
going_to_fetch = false;
no_sprites = false;
glitchy_eval = false;
@ -749,6 +750,10 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
{
fetch_sprite_01 = true;
}
if ((SL_sprites[i * 4 + 1] % 8) > 3)
{
fetch_sprite_4 = true;
}
}
}
}
@ -1036,35 +1041,49 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
fetch_sprite_01 = false;
}
if (fetch_sprite_4)
{
sprite_fetch_counter -= 2;
fetch_sprite_4 = false;
}
int last_eval = 0;
// at this time it is unknown what each cycle does, but we only need to accurately keep track of cycles
for (int i = 0; i < SL_sprites_index; i++)
{
if (glitchy_eval && (SL_sprites[i * 4 + 1] == 0))
if (glitchy_eval)
{
sprite_fetch_counter += 6;
evaled_sprites |= (1 << i);
if (SL_sprites[i * 4 + 1] == 0)
{
sprite_fetch_counter += 6;
evaled_sprites |= (1 << i);
last_eval = SL_sprites[i * 4 + 1];
}
}
else if ((pixel_counter >= (SL_sprites[i * 4 + 1] - 8)) &&
(pixel_counter < (SL_sprites[i * 4 + 1])) &&
!evaled_sprites.Bit(i))
{
sprite_fetch_counter += 6;
evaled_sprites |= (1 << i);
//Console.Write(SL_sprites[i * 4 + 1]);
//Console.Write(" ");
last_eval = SL_sprites[i * 4 + 1];
}
}
// if we didn't evaluate all the sprites immediately, 2 more cycles are added to restart it
if (evaled_sprites != (Math.Pow(2,SL_sprites_index) - 1))
{
sprite_fetch_counter += 2;
if ((last_eval % 8) == 0) { sprite_fetch_counter += 3; }
else if ((last_eval % 8) == 1) { sprite_fetch_counter += 2; }
else if ((last_eval % 8) == 2) { sprite_fetch_counter += 3; }
else if ((last_eval % 8) == 3) { sprite_fetch_counter += 2; }
else if ((last_eval % 8) == 4) { sprite_fetch_counter += 3; }
else { sprite_fetch_counter += 2; }
}
glitchy_eval = false;
//Console.WriteLine(sprite_fetch_counter);
}
else
{
@ -1179,14 +1198,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
public void reorder_and_assemble_sprites()
{
sprite_ordered_index = 0;
/*
for (int i = 0; i < SL_sprites_index; i++)
{
Console.Write(SL_sprites[i * 4 + 1]);
Console.Write(" ");
}
Console.WriteLine(" ");
*/
for (int i = 0; i < 256; i++)
{
for (int j = 0; j < SL_sprites_index; j++)
@ -1300,6 +1312,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
ser.Sync("sprite_fetch_cycles", ref sprite_fetch_cycles);
ser.Sync("fetch_sprite", ref fetch_sprite);
ser.Sync("fetch_sprite_01", ref fetch_sprite_01);
ser.Sync("fetch_sprite_4", ref fetch_sprite_4);
ser.Sync("going_to_fetch", ref going_to_fetch);
ser.Sync("sprite_fetch_counter", ref sprite_fetch_counter);
ser.Sync("sprite_attr_list", ref sprite_attr_list, false);