@Override
protected void onRisingClockEdge(Microinstruction m) {
AccMicroinstr mi = (AccMicroinstr) getCurrentMicroinstruction();
if (mi.pcw) {
PC.clock();
}
if (mi.irw) {
IR.clock();
}
if (mi.psww) {
psw.clock();
}
if (mi.aw) {
A.clock();
}
if (mi.mwr) {
try {
systemBus.write(ab, db, SystemBus.M_16);
} catch (Exception ex) {
System.out.println(ex.getMessage());
System.exit(1);
}
}
}
@Override
protected void onLogic(Microinstruction mi) {
AccMicroinstr m = (AccMicroinstr) mi;
short op1 = 0, op2 = 0;
ab =
(short)
((!m.aoe)
? 0xFFFF
: (m.asel == 0) ? IR.getQ() : (m.asel == 1) ? PC.getQ() : 0x10);
if (m.moe) {
if (!m.aoe) {
java.lang.System.out.printf("Error: address bus in Z state\n");
java.lang.System.exit(1);
}
if (m.doe) {
java.lang.System.out.printf(
"Error: bus conflict on DB (moe and doe active simultaneously)\n");
java.lang.System.exit(1);
}
try {
db = systemBus.read(ab, SystemBus.M_16);
} catch (Exception ex) {
System.out.println(ex.getMessage());
System.exit(1);
}
}
switch (m.src1s) {
case 0:
op1 = IR.getQ();
break;
case 1:
op1 = db;
break;
case 2:
op1 = (short) m.k;
break;
}
switch (m.src2s) {
case 0:
op2 = IR.getQ();
break;
case 1:
op2 = PC.getQ();
break;
case 2:
op2 = A.getQ();
break;
case 3:
op2 = psw.output();
break;
}
aluo = alu.exec(m.aluop, op1, op2, aluo, psw);
if (m.asel == 2 && m.aoe) {
ab = aluo;
}
if (m.doe) {
db = aluo;
} else if (!m.moe) {
db = (short) 0xFFFF;
}
// BUSes -> Registers
PC.setD(aluo);
IR.setD(db);
A.setD(aluo);
if (controller.getState() == 0) {
print(true);
}
print(false);
}