//stores word to memory address:
public override void Execute(uint Rn, uint Rd, Offset offst)
{
int EA = GetEffAddr(Rn, offst); //((int)Rn + (U == 1 ? offst.GetValue() : -offst.GetValue())) & 0xFFFFFFFF;
if (EA == 0x100000)
{
I_Console_Ref.Append((char)CPU.GetRegr(I_Reg, (int)Rd));
}
else
{
if (B == 1)
{
byte b = Convert.ToByte(CPU.GetRegr(I_Reg, (int)Rd) & 0xFF);
I_RAM.WriteByte(b, EA);
}
else
{
I_RAM.WriteWord(CPU.GetRegr(I_Reg, (int)Rd), EA);
}
if (W == 1)
{
CPU.SetReg(I_Reg, (int)Rn, EA);
}
}
}
//Loads word from memory address:
public override void Execute(uint Rn, uint Rd, Offset offst)
{
//LDR <Rd>, <addressing_mode>
int EA = GetEffAddr(Rn, offst); //((int)Rn + (U == 1 ? offst.GetValue(): -offst.GetValue())) & 0xFFFFFFFF;
if (EA == 0x100001)
{
//check after check if input buff is empty
I_Last_Char = I_Input_Buff.Count != 0 ? I_Input_Buff[I_Input_Buff.Count - 1] : (char)0;
CPU.SetReg(I_Reg, (int)Rd, Convert.ToInt32(I_Last_Char));
}
else
{
if (B == 1)
{
CPU.SetReg(I_Reg, (int)Rd, I_RAM.ReadByte((uint)EA));
}
else
{
CPU.SetReg(I_Reg, (int)Rd, I_RAM.ReadWord(EA)); //Remember to check what memreads return if invalid EA
}
if (W == 1)
{
CPU.SetReg(I_Reg, (int)Rn, EA);
}
}
}
public override void Execute(uint Rn, List <int> Reglist)
{
int EA = CPU.GetRegr(I_Reg, (int)Rn);
foreach (int i in Reglist)
{
int val = I_RAM.ReadWord(EA);
CPU.SetReg(I_Reg, i, val);
EA += 4;
}
if (W == 1)
{
CPU.SetReg(I_Reg, (int)Rn, EA);
}
}
//pushes register list onto stack
public override void Execute(uint Rn, List <int> Reglist)
{
int EA = CPU.GetRegr(I_Reg, (int)Rn);
EA -= (4 * Reglist.Count);
if (W == 1)
{
CPU.SetReg(I_Reg, (int)Rn, EA);
}
foreach (int i in Reglist)
{
int val = CPU.GetRegr(I_Reg, i);
I_RAM.WriteWord(val, EA);
EA += 4;
}
}