/// <summary>
/// Leaves the load mode. Stops the device that playes EAR pulses
/// </summary>
private void LeaveLoadMode()
{
_currentMode = TapeOperationMode.Passive;
_tapePlayer = null;
ContentProvider?.Reset();
HostVm.BeeperDevice.SetTapeOverride(false);
}
/// <summary>
/// Leaves the load mode. Stops the device that playes EAR pulses
/// </summary>
private void LeaveLoadMode()
{
_currentMode = TapeOperationMode.Passive;
_tapePlayer = null;
TapeProvider?.Reset();
HostVm.BeeperDevice.SetTapeOverride(false);
LeftLoadMode?.Invoke(this, EventArgs.Empty);
}
/// <summary>
/// Resets the tape device
/// </summary>
public void Reset()
{
TapeProvider?.Reset();
_tapePlayer = null;
_currentMode = TapeOperationMode.Passive;
_savePhase = SavePhase.None;
_micBitState = true;
}
/// <summary>
/// Puts the device in load mode. From now on, EAR pulses are played by a device
/// </summary>
private void EnterLoadMode()
{
_currentMode = TapeOperationMode.Load;
var contentReader = ContentProvider?.GetTapeContent();
if (contentReader == null)
{
return;
}
// --- Play the content
_tapePlayer = new CommonTapeFilePlayer(contentReader);
_tapePlayer.ReadContent();
_tapePlayer.InitPlay(_cpu.Tacts);
HostVm.BeeperDevice.SetTapeOverride(true);
}
/// <summary>
/// Puts the device in load mode. From now on, EAR pulses are played by a device
/// </summary>
private void EnterLoadMode()
{
_currentMode = TapeOperationMode.Load;
EnteredLoadMode?.Invoke(this, EventArgs.Empty);
var contentReader = TapeLoadLoadProvider?.GetTapeContent();
if (contentReader == null)
{
return;
}
// --- Play the content
_tapePlayer = new CommonTapeFilePlayer(contentReader);
_tapePlayer.ReadContent();
contentReader.Dispose();
_tapePlayer.InitPlay(_cpu.Tacts);
HostVm.BeeperDevice.SetTapeOverride(true);
}
/// <summary>
/// Tests if the specified file is a valid ZX Spectrum screen file
/// </summary>
/// <param name="filename">File name to check</param>
/// <returns></returns>
public static bool CheckScreenFile(string filename)
{
try
{
using (var reader = new BinaryReader(File.OpenRead(filename)))
{
var player = new CommonTapeFilePlayer(reader);
player.ReadContent();
// --- Test if file is a screen file
// --- Two data blocks
if (player.DataBlocks.Count != 2)
{
return(false);
}
// --- Block lenghts should be 19 and 6914
var header = ((ITapeData)player.DataBlocks[0]).Data;
if (header.Length != 19 ||
((ITapeData)player.DataBlocks[1]).Data.Length != 6914)
{
return(false);
}
// --- Test header bytes
return(header[0] == 0x00 && header[1] == 0x03 && // --- Code header
header[12] == 0x00 && header[13] == 0x1B && // --- Length: 0x1B00
header[14] == 0x00 && header[15] == 0x40 && // --- Address: 0x4000
header[16] == 0x00 && header[17] == 0x80); // --- Param2: 0x8000
}
}
catch (Exception)
{
// --- If we cannot read the file, we consider it an invalid screen file.
return(false);
}
}