/// <summary>
/// Places the contents of the PC into AR, then places the contents of memory pointed to by AR into the IR.
/// </summary>
private void fetch()
{
// R'T0:
// AR <- PC;
AR = PC;
// T0 -> T1
timeCC++;
// R'T1:
// IR <- M[AR]
IR.HexStringValue = Memory[ +AR ];
// PC <- PC + 1
PC++;
// T1 -> T2
timeCC++;
}
/// <summary>
///
/// </summary>
private void cfi()
{
//Check for interrupts, if (IEN==1)&&(FGI==1), then R = 1
if ( IEN == 1 && FGI == 1 )
{
R = 1;
// RT0: AR<-0, TR<-PC
AR.Value = 0;
TR = PC;
timeCC++;
// RT1: M[AR]<-TR, PC<-0
Memory[AR.Value] = TR.HexStringValue;
PC.Value = 0;
timeCC++;
// RT2: PC<-PC+1, IEN<-0, R<-0
PC++;
IEN = 0;
R = 0;
timeCC++;
}
if ( interruptCursor < interruptTime.Length )
{
// Simulate Input...
if ( timeCC >= interruptTime[interruptCursor] && FGI == 0 )
{
// Copy the value into the INPR
INPR.HexStringValue = valueForINPR[interruptCursor];
// Set FGI=1
FGI = 1;
// Advance the script cursor (to the next request)
interruptCursor++;
}
}
}