/// <summary>
/// Constructs a
/// <see cref="DynamicTable.Entry"/> for the atrribute phase of a
/// bidirectional screen load.
/// </summary>
/// <param name='attrLine'>
/// The attribute line, numbered from zero.
/// </param>
/// <param name='backwards'>
/// Set if the block is to be loaded backwards.
/// </param>
/// <param name='change'>
/// Set if the load direction is to be changed before loading the block.
/// </param>
/// <returns>
/// The <see cref="DynamicTable.Entry"/> instance.
/// </returns>
private static DynamicTable.Entry MakeBidiEntry
(byte attrLine, bool backwards = false, bool change = false)
{
int address = 0x5800 + (attrLine * 32);
if (backwards)
{
address += 31;
}
var entry = new DynamicTable.Entry((ushort)address, 32, change);
return(entry);
}
/// <summary>
/// Constructs a
/// <see cref="DynamicTable.Entry"/> for the pixmap phase of a
/// bidirectional screen load.
/// </summary>
/// <param name='third'>
/// The third of the screen, numbered from zero.
/// </param>
/// <param name='line'>
/// The pixel line within the third, numbered from zero.
/// </param>
/// <param name='backwards'>
/// Set if the block is to be loaded backwards.
/// </param>
/// <param name='change'>
/// Set if the load direction is to be changed before loading the block.
/// </param>
private static DynamicTable.Entry MakeBidiEntry
(byte third, byte line, bool backwards = false, bool change = false)
{
int address = 16384 + (third * 2048);
address += (line * 256);
if (backwards)
{
address += 255;
}
var entry = new DynamicTable.Entry((ushort)address, 256, change);
return(entry);
}