/// <summary>
/// Trap Transfer
/// 2 TTR Y +0021
/// This instruction causes the calculator to take its next instruction from location Y and to
/// proceed from there whether in the trapping mode or not. This makes it possible to have an
/// ordinary transfer even when in the trapping mode.
/// </summary>
/// <param name="cpu"></param>
private static void TTR(CPU cpu)
{
cpu.InstructionCounter.Value = cpu.IndexedAddress;
}
private static void NOP(CPU cpu) //No Operation
{
//Increment IR
cpu.InstructionCounter.Increment(1);
}
/// <summary>
/// Leave Trapping Mode 2 LTM —0760... 007
///
/// This instruction turns off the trapping indicator and the trap light on the operator's console.
/// The calculator will not operate in the trapping mode until another enter trapping mode operation is executed.
/// NOTE: When the calculator is operating in the trapping mode, the location of every transfer
/// instruc¬tion (except trap transfer instructions) replaces the address part of location 0000,
/// whether or not the conditions for transfer of control are met. If the condition is met, the
/// calculator takes the next in¬struction from location 0001 and proceeds from that point. The
/// location of each transfer instruction re¬places the address part of location 0000.
/// </summary>
/// <param name="cpu"></param>
private static void LTM(CPU cpu)
{
cpu.TrappingModeIndicator = false;
cpu.InstructionCounter.Increment(1);
}
/// <summary>
/// Halt and Transfer 2 HTR Y +0000
/// This instruction stops the calculator. When the start key on the operator's console is depressed,
/// the calculator starts again, taking the next instruction from location Y and proceeding from there.
/// When the calculator stops, the effective address of the HTR instruction is placed in the instruction
/// loca¬tion counter before executing any instruction. If TSX is manually executed, the 2's complement
/// of this effective address is placed in the specified index reg¬ister, and the transfer is executed.
/// </summary>
/// <param name="cpu"></param>
private static void HTR(CPU cpu)
{
cpu.Running = false;
cpu.InstructionCounter.Value = cpu.IndexedAddress;
}
public void Execute(CPU cpu)
{
_executeMethod.Invoke(cpu);
}