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Intellivision implement BackTab calls 

Correct timing for background drawing, not sure if any game uses it though
This commit is contained in:
alyosha-tas 2016-12-23 20:07:12 -05:00 committed by GitHub
parent 35d86388a4
commit 585f35b29e
3 changed files with 77 additions and 69 deletions
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15
BizHawk.Emulation.Cores/Consoles/Intellivision/Intellivision.IEmulator.cs
View File

@ -25,11 +25,12 @@ namespace BizHawk.Emulation.Cores.Intellivision
_psg.sample_count = 0;
_frame++;
stic_row = -1;
// read the controller state here for now
get_controller_state();
// this timer tracks cycles stolen by the STIC during the visible part of the frame, quite a large number of them actually
int delay_cycles = 0;
int delay_cycles = 600;
int delay_timer = -1;
_cpu.PendingCycles = (14934 - 3791 + _cpu.GetPendingCycles());
@ -53,13 +54,19 @@ namespace BizHawk.Emulation.Cores.Intellivision
}
}
if (delay_cycles>= 800 && _stic.active_display)
if (delay_cycles>= 750 && _stic.active_display)
{
delay_cycles = -1;
delay_timer = 110;
_stic.ToggleSr2();
if (stic_row >= 0)
{
_stic.in_vb_2 = true;
_stic.Background(stic_row);
_stic.in_vb_2 = false;
}
stic_row++;
}
Connect();
}
@ -69,7 +76,6 @@ namespace BizHawk.Emulation.Cores.Intellivision
if (_stic.active_display)
{
_stic.Background();
_stic.Mobs();
}
@ -100,6 +106,7 @@ namespace BizHawk.Emulation.Cores.Intellivision
}
private int _frame;
private int stic_row;
public int Frame { get { return _frame; } }
public string SystemId

1
BizHawk.Emulation.Cores/Consoles/Intellivision/Intellivision.IStatable.cs
View File

@ -50,6 +50,7 @@ namespace BizHawk.Emulation.Cores.Intellivision
ser.BeginSection("Intellivision");
ser.Sync("version", ref version);
ser.Sync("Frame", ref _frame);
ser.Sync("stic_row", ref stic_row);
ser.Sync("ScratchpadRam", ref ScratchpadRam, false);
ser.Sync("SystemRam", ref SystemRam, false);

4
BizHawk.Emulation.Cores/Consoles/Intellivision/STIC.cs
View File

@ -319,7 +319,7 @@ namespace BizHawk.Emulation.Cores.Intellivision
throw new ArgumentException("Specified color does not exist.");
}
public void Background()
public void Background(int input_row)
{
// here we will also need to apply the 'delay' register values.
// this shifts the background portion of the screen relative to the mobs
@ -328,7 +328,7 @@ namespace BizHawk.Emulation.Cores.Intellivision
ColorSP = 0x0028;
// The background is a 20x12 grid of "cards".
for (int card_row = 0; card_row < 12; card_row++)
for (int card_row = input_row; card_row < (input_row+1); card_row++)
{
for (int card_col = 0; card_col < 20; card_col++)
{