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implemented Goto Instruction; Increment ProgramCounter; (#2)

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Co-authored-by: Darkress <30271678+DarkressX@users.noreply.github.com>
Reviewed-on: darkress/pic16f84-sim#2
This commit was merged in pull request #2.
This commit is contained in:
darkress
2023-05-29 18:07:48 +02:00
parent bfbec8d525
commit 1b3529c403
6 changed files with 78 additions and 10 deletions
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25
de/darkress/pic16f84sim/microcontroller/Memory.java
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@@ -91,6 +91,28 @@ public class Memory
return memory[0x4];
}
public static int getPCL()
{
return memory[0x2];
}
public static void setPCL(int data)
{
memory[0x2] = data;
memory[0x82] = data;
}
public static int getPCLATH()
{
return memory[0xA] & 0x1F;
}
public static void setPCLATH(int data)
{
memory[0xA] = data & 0x1F;
memory[0x8A] = data & 0x1F;
}
public static boolean getZeroBit()
{
return (memory[0x03] & 0x04) == 0x04;
@@ -99,6 +121,7 @@ public class Memory
public static void setZeroBit()
{
memory[0x03] |= 0x04;
memory[0x83] |= 0x04;
}
public static void clearZeroBit()
@@ -114,6 +137,7 @@ public class Memory
public static void setDigitCarryBit()
{
memory[0x03] |= 0x02;
memory[0x83] |= 0x02;
}
public static void clearDigitCarryBit()
@@ -129,6 +153,7 @@ public class Memory
public static void setCarryBit()
{
memory[0x03] |= 0x01;
memory[0x83] |= 0x01;
}
public static void clearCarryBit()

29
de/darkress/pic16f84sim/microcontroller/ProgramCounter.java
View File

@@ -4,20 +4,35 @@ public class ProgramCounter
//This class is not actual part of the µC. It is a storage for the current value of the PC
{
private static int PC = 0;
private static int pc = 0;
public static int getPC()
public static int getPc()
{
return PC;
return pc;
}
public static void setPC(int PC)
public static void setPcForGotoCall(int data)
{
ProgramCounter.PC = PC;
int pcl = data & 0x00FF;
int pch = Memory.getPCLATH();
pch = ((pch & 0xF8) <<8) + (data & 0x700);
Memory.setPCL(pcl);
pc = (pch) + pcl;
}
public static void incPC()
public static void incPC() //is called after every instruction execution
{
PC++;
int pcl = Memory.getPCL();
int pclath = Memory.getPCLATH();
if(pcl == 0xFF)
{
pclath++;
pcl = 0;
} else {
pcl++;
}
Memory.setPCL(pcl);
Memory.setPCLATH(pclath);
pc = (pclath <<8) + pcl;
}
}