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Code Issues Releases Wiki Activity

Readme updates, installer updates. A couple of smallish (10%) performance enhancements.

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This commit is contained in:
Josh Dersch
2016-03-14 16:50:41 -07:00
parent a79fd5f016
commit dc0a85aed8
19 changed files with 258 additions and 82 deletions
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62
Contralto/Display/DisplayController.cs
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@@ -8,7 +8,7 @@ namespace Contralto.Display
/// as it scans across the screen. It implements the logic of the display's sync generator
/// and wakes up the DVT and DHT tasks as necessary during a display field.
/// </summary>
public class DisplayController : IClockable
public class DisplayController
{
public DisplayController(AltoSystem system)
{
@@ -35,13 +35,21 @@ namespace Contralto.Display
public bool DWTBLOCK
{
get { return _dwtBlocked; }
set { _dwtBlocked = value; }
set
{
_dwtBlocked = value;
CheckWordWakeup();
}
}
public bool DHTBLOCK
{
get { return _dhtBlocked; }
set { _dhtBlocked = value; }
set
{
_dhtBlocked = value;
CheckWordWakeup();
}
}
public bool FIFOFULL
@@ -59,6 +67,12 @@ namespace Contralto.Display
_word = 0;
_dwtBlocked = true;
_dhtBlocked = false;
_dataBuffer.Clear();
if (_system.CPU != null)
{
CheckWordWakeup();
}
_whiteOnBlack = _whiteOnBlackLatch = false;
_lowRes = _lowResLatch = false;
@@ -133,8 +147,8 @@ namespace Contralto.Display
_dataBuffer.Clear();
_dwtBlocked = false;
_dhtBlocked = false;
DWTBLOCK = false;
DHTBLOCK = false;
// Run CURT
_system.CPU.WakeupTask(TaskType.Cursor);
@@ -188,6 +202,7 @@ namespace Contralto.Display
if (_dataBuffer.Count > 0)
{
displayWord = _whiteOnBlack ? _dataBuffer.Dequeue() : (ushort)~_dataBuffer.Dequeue();
CheckWordWakeup();
}
_display.DrawDisplayWord(_scanline, _word, displayWord, _lowRes);
@@ -232,7 +247,7 @@ namespace Contralto.Display
// Schedule HBlank wakeup for end of next HBlank
_horizontalWakeup.TimestampNsec = _horizontalBlankDuration - skewNsec;
_system.Scheduler.Schedule(_horizontalWakeup);
_dwtBlocked = false;
DWTBLOCK = false;
_dataBuffer.Clear();
// Deal with SWMODE latches for the scanline we're about to draw
@@ -261,21 +276,28 @@ namespace Contralto.Display
}
}
public void Clock()
{
//
// "If the DWT has not executed a BLOCK, if DHT is not blocked, and if the
// buffer is not full, DWT wakeups are generated."
//
// TODO: move this logic elsewhere so it doesn't have to be polled.
if (_dataBuffer.Count < 16 &&
!_dhtBlocked &&
!_dwtBlocked)
{
private void CheckWordWakeup()
{
if (FIFOFULL ||
DHTBLOCK ||
DWTBLOCK)
{
// If the fifo is full or either the horizontal or word tasks have blocked,
// the word task must be blocked.
_system.CPU.BlockTask(TaskType.DisplayWord);
}
else if (!FIFOFULL &&
!DHTBLOCK &&
!DWTBLOCK)
{
//
// "If the DWT has not executed a BLOCK, if DHT is not blocked, and if the
// buffer is not full, DWT wakeups are generated."
//
_system.CPU.WakeupTask(TaskType.DisplayWord);
}
}
}
public void LoadDDR(ushort word)
{
_dataBuffer.Enqueue(word);
@@ -285,6 +307,8 @@ namespace Contralto.Display
{
_dataBuffer.Dequeue();
}
CheckWordWakeup();
}
public void LoadXPREG(ushort word)