95 lines
2.1 KiB
C#
95 lines
2.1 KiB
C#
using BizHawk.Common;
|
|
|
|
namespace BizHawk.Emulation.Cores.Atari.Atari2600
|
|
{
|
|
public partial class TIA
|
|
{
|
|
private struct MissileData
|
|
{
|
|
public bool Enabled;
|
|
public bool ResetToPlayer;
|
|
public byte HPosCnt;
|
|
public byte Size;
|
|
public byte Number;
|
|
public byte Hm;
|
|
public byte Collisions;
|
|
|
|
// Resp commands do not trugger start signals for main copies. We need to model this
|
|
public bool Draw_Main;
|
|
|
|
public bool Tick()
|
|
{
|
|
var result = false;
|
|
|
|
// At hPosCnt == 0, start drawing the missile, if enabled
|
|
if (HPosCnt < (1 << Size) && Draw_Main == true)
|
|
{
|
|
if (Enabled && !ResetToPlayer)
|
|
{
|
|
// Draw the missile
|
|
result = true;
|
|
}
|
|
}
|
|
|
|
if ((Number & 0x07) == 0x01 || ((Number & 0x07) == 0x03))
|
|
{
|
|
if (HPosCnt >= 16 && HPosCnt <= (16 + (1 << Size) - 1))
|
|
{
|
|
if (Enabled && !ResetToPlayer)
|
|
{
|
|
// Draw the missile
|
|
result = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((Number & 0x07) == 0x02 || ((Number & 0x07) == 0x03) || ((Number & 0x07) == 0x06))
|
|
{
|
|
if (HPosCnt >= 32 && HPosCnt <= (32 + (1 << Size) - 1))
|
|
{
|
|
if (Enabled && !ResetToPlayer)
|
|
{
|
|
// Draw the missile
|
|
result = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((Number & 0x07) == 0x04 || (Number & 0x07) == 0x06)
|
|
{
|
|
if (HPosCnt >= 64 && HPosCnt <= (64 + (1 << Size) - 1))
|
|
{
|
|
if (Enabled && !ResetToPlayer)
|
|
{
|
|
// Draw the missile
|
|
result = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Increment the counter
|
|
HPosCnt++;
|
|
|
|
// Counter loops at 160
|
|
HPosCnt %= 160;
|
|
|
|
return result;
|
|
}
|
|
|
|
public void SyncState(Serializer ser)
|
|
{
|
|
ser.BeginSection("Missile");
|
|
ser.Sync("enabled", ref Enabled);
|
|
ser.Sync("resetToPlayer", ref ResetToPlayer);
|
|
ser.Sync("hPosCnt", ref HPosCnt);
|
|
ser.Sync("size", ref Size);
|
|
ser.Sync("number", ref Number);
|
|
ser.Sync("HM", ref Hm);
|
|
ser.Sync("collisions", ref Collisions);
|
|
ser.Sync("draw_main", ref Draw_Main);
|
|
ser.EndSection();
|
|
}
|
|
}
|
|
}
|
|
}
|