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Intellivision implement STIC masking

This commit is contained in:
alyosha-tas 2016-12-19 10:27:36 -05:00 committed by GitHub
parent 36daa01ad6
commit 97a8430f5d
1 changed files with 79 additions and 14 deletions
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93
BizHawk.Emulation.Cores/Consoles/Intellivision/STIC.cs
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@ -56,6 +56,11 @@ namespace BizHawk.Emulation.Cores.Intellivision
{
Sr1 = true;
Sr2 = true;
for (int i=0;i<64;i++)
{
Register[i] = register_mask(i, 0);
}
}
public bool GetSr1()
@ -78,6 +83,54 @@ namespace BizHawk.Emulation.Cores.Intellivision
Sst = value;
}
// mask off appropriate STIC bits
private ushort register_mask(int reg, ushort value)
{
if (reg < 8)
{
return (ushort)((value & 0x7FF) | 0x3800);
}
else if (reg < 16)
{
return (ushort)((value & 0xFFF) | 0x3000);
}
else if (reg < 24)
{
return (ushort)(value & 0x3FFF);
}
else if (reg < 32)
{
return (ushort)((value & 0x3FF) | 0x3C00);
}
else if (reg < 40)
{
return (ushort)(0x3FFF);
}
else if (reg < 45)
{
return (ushort)((value & 0xF) | 0x3FF0);
}
else if (reg < 48)
{
return (ushort)(0x3FFF);
}
else if (reg < 51)
{
if (reg==50)
{
return (ushort)((value & 0x3) | 0x3FFC);
}
else
return (ushort)((value & 0x7) | 0x3FF8);
}
else if (reg < 64)
{
return (ushort)(0x3FFF);
}
return value;
}
public ushort? ReadSTIC(ushort addr)
{
switch (addr & 0xF000)
@ -144,7 +197,10 @@ namespace BizHawk.Emulation.Cores.Intellivision
{
Fgbg = true;
}
Register[addr] = value;
//Console.WriteLine(value);
//Console.WriteLine(addr);
Register[addr] = register_mask(addr,value);
return true;
}
else if (addr <= 0x007F)
@ -161,7 +217,7 @@ namespace BizHawk.Emulation.Cores.Intellivision
{
Fgbg = true;
}
Register[addr - 0x4000] = value;
Register[addr - 0x4000] = register_mask(addr - 0x4000, value);
return true;
}
break;
@ -173,7 +229,7 @@ namespace BizHawk.Emulation.Cores.Intellivision
{
Fgbg = true;
}
Register[addr & 0x003F] = value;
Register[addr & 0x003F] = register_mask(addr & 0x003F, value);
return true;
}
break;
@ -185,7 +241,7 @@ namespace BizHawk.Emulation.Cores.Intellivision
{
Fgbg = true;
}
Register[addr - 0xC000] = value;
Register[addr - 0xC000] = register_mask(addr - 0xC000, value);
return true;
}
break;
@ -413,8 +469,8 @@ namespace BizHawk.Emulation.Cores.Intellivision
// there is a trick here in that we move the displayed area of the screen relative to the BG buffer
// this is done using the delay registers
int x_delay = Register[0x30];
int y_delay = Register[0x31];
int x_delay = Register[0x30] & 0x7;
int y_delay = Register[0x31] & 0x7;
int x_border = (Register[0x32] & 0x0001) * 8;
int y_border = ((Register[0x32] >> 1) & 0x0001) * 8;
@ -484,8 +540,8 @@ namespace BizHawk.Emulation.Cores.Intellivision
ushort attr;
byte row;
int x_delay = Register[0x30];
int y_delay = Register[0x31];
int x_delay = Register[0x30] & 0x7;
int y_delay = Register[0x31] & 0x7;
int cur_x, cur_y;
@ -515,6 +571,8 @@ namespace BizHawk.Emulation.Cores.Intellivision
bool intr = x.Bit(8);
ushort x_size = x.Bit(10) ? (ushort)2 : (ushort)1;
//Console.WriteLine(intr);
ushort y_size = (ushort)(ysiz2 * ysiz4);
// setting yres implicitly uses an even card first
if (yres>1)
@ -729,8 +787,8 @@ namespace BizHawk.Emulation.Cores.Intellivision
// by now we have collision information for all 8 mobs and the BG
// so we can store data in the collision registers here
int x_border = Register[0x32].Bit(0) ? 16 : 8;
int y_border = Register[0x32].Bit(1) ? 32 : 16;
int x_border = Register[0x32].Bit(0) ? 16-x_delay : 8-x_delay;
int y_border = Register[0x32].Bit(1) ? 32-y_delay*2 : 16-y_delay*2;
int x_border_2 = Register[0x32].Bit(0) ? 8 : 0;
int y_border_2 = Register[0x32].Bit(1) ? 16 : 0;
@ -740,11 +798,11 @@ namespace BizHawk.Emulation.Cores.Intellivision
for (int j = 0; j < 210; j++)
{
// while we are here we can set collision detection bits for the border region
if (i<x_border || i==166)
if (i == x_border || i == (165-x_delay))
{
Collision[i, j] |= (1 << 9);
}
if (j < y_border || j >= 208)
if ((j == y_border || j == y_border-1) || (j == (207-y_delay*2) || j == (207 - y_delay * 2+1)))
{
Collision[i, j] |= (1 << 9);
}
@ -753,10 +811,10 @@ namespace BizHawk.Emulation.Cores.Intellivision
if ((i-x_delay)>=0 && (i-x_delay)<159 && (j-y_delay*2)>=0 && (j-y_delay*2)<192)
{
if ((i-x_delay) < x_border_2)
FrameBuffer[(j - y_delay*2) * 159 + (i - x_delay)] = ColorToRGBA(Register[0x2C]);
FrameBuffer[(j - y_delay*2) * 159 + (i - x_delay)] = ColorToRGBA(Register[0x2C] & 0xF);
if ((j - y_delay*2) < y_border_2)
FrameBuffer[(j - y_delay*2) * 159 + (i - x_delay)] = ColorToRGBA(Register[0x2C]);
FrameBuffer[(j - y_delay*2) * 159 + (i - x_delay)] = ColorToRGBA(Register[0x2C] & 0xF);
}
// the extra condition here is to ignore only border collsion bit set
@ -778,6 +836,13 @@ namespace BizHawk.Emulation.Cores.Intellivision
}
}
for (int z=0;z<8;z++)
{
//Console.WriteLine(z);
//Console.WriteLine(Register[z + 24]);
}
}
// end of Mobs function, we now have collision and graphics data for the mobs