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Basic implementation of player 0 graphics

This commit is contained in:
pjgat09 2012-03-10 08:34:04 +00:00
parent 5493904312
commit 8a73d50e0b
1 changed files with 98 additions and 46 deletions
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78
BizHawk.Emulation/Consoles/Atari/2600/TIA.cs
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@ -11,8 +11,12 @@ namespace BizHawk.Emulation.Consoles.Atari
{
MOS6502 Cpu;
UInt32 PF; // PlayField data
byte background;
UInt32 BKcolor, PFcolor;
byte BKcolor, PFcolor, P0color;
byte grp0;
byte resetP0 = 0;
bool PFpriority = false;
bool P0Reflect = false;
int[] frameBuffer;
public bool frameComplete;
@ -20,9 +24,6 @@ namespace BizHawk.Emulation.Consoles.Atari
uint[] scanline = new uint[160];
int scanlinePos;
int drawClocksStart;
int drawLastUpdate;
UInt32[] palette = new UInt32[]{
0x000000, 0, 0x4a4a4a, 0, 0x6f6f6f, 0, 0x8e8e8e, 0,
0xaaaaaa, 0, 0xc0c0c0, 0, 0xd6d6d6, 0, 0xececec, 0,
@ -94,14 +95,32 @@ namespace BizHawk.Emulation.Consoles.Atari
}
UInt32 color;
color = palette[BKcolor];
if ((PF & PFmask) != 0)
{
color = palette[PFcolor];
}
else
// Player 1
if (pixelPos >= resetP0 && pixelPos < (resetP0 + 8))
{
color = palette[BKcolor];
byte mask = (byte)(0x80 >> (pixelPos - resetP0));
if (P0Reflect)
{
mask = reverseBits(mask);
}
if ((grp0 & mask) != 0)
{
color = palette[P0color];
}
}
if ((PF & PFmask) != 0 && PFpriority == true)
{
color = palette[PFcolor];
}
scanline[pixelPos] = color;
scanlinePos++;
@ -120,7 +139,7 @@ namespace BizHawk.Emulation.Consoles.Atari
{
for (int col = 0; col < 320; col++)
{
if (scanlinesBuffer.Count != null && scanlinesBuffer.Count > row)
if (scanlinesBuffer.Count > row)
{
frameBuffer[row * 320 + col] = (int)(scanlinesBuffer[row][col / 2]);
}
@ -181,6 +200,40 @@ namespace BizHawk.Emulation.Consoles.Atari
execute(1);
}
}
else if (maskedAddr == 0x06) // COLUP0
{
P0color = value;
}
else if (maskedAddr == 0x08) // COLUPF
{
PFcolor = value;
}
else if (maskedAddr == 0x09) // COLUBK
{
BKcolor = value;
}
else if (maskedAddr == 0x0A) // CTRLPF
{
if ((value & 0x04) != 0)
{
PFpriority = true;
}
else
{
PFpriority = false;
}
}
else if (maskedAddr == 0x0B) // REFP0
{
if ((value & 0x04) != 0)
{
P0Reflect = true;
}
else
{
P0Reflect = false;
}
}
else if (maskedAddr == 0x0D) // PF0
{
PF = (UInt32)((PF & 0x0FFFF) + ((reverseBits(value) & 0x0F) << 16));
@ -193,15 +246,14 @@ namespace BizHawk.Emulation.Consoles.Atari
{
PF = (UInt32)((PF & 0xFFF00) + reverseBits(value));
}
else if (maskedAddr == 0x08) // COLUPF
else if (maskedAddr == 0x10) // RESP0
{
PFcolor = (UInt32)(value);
resetP0 = (byte)(scanlinePos - 68);
}
else if (maskedAddr == 0x09) // COLUBK
else if (maskedAddr == 0x1B) // GRP0
{
BKcolor = (UInt32)(value);
grp0 = value;
}
}
public byte reverseBits(byte value)