36 lines
914 B
Java
36 lines
914 B
Java
package de.darkress.pic16f84sim.commands;
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import de.darkress.pic16f84sim.microcontroller.Cycles;
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import de.darkress.pic16f84sim.microcontroller.Memory;
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import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
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public class Decfsz extends FileRegisterCommandUtils implements Command
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{
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private final int address;
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private final boolean destinationBit;
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public Decfsz(int input)
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{
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address = input & 0x007F;
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destinationBit = checkDestinationBit(input);
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}
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@Override
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public void execute()
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{
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ProgramCounter.incPC();
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Cycles.incCycles();
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int result = Memory.getRegister(address) + 255; // Allow underflow
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checkZeroBit(result);
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writeToDestination(destinationBit, address, result % 256); // Catch underflow
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if((result % 256) == 0)
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{
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Nop nop = new Nop();
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nop.execute();
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}
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}
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}
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