Fixed things

main.py

@@ -1,151 +1,105 @@
-#made by zombie
+#  made by zombie
-#02/01/21
+#  02/01/21
-
-#0-255 is internal registers and flags and etc
-# program execcution starts at 256
-#stack starts at end of memory FILO
-
-#flags
-#nil nil nil nil nil nil negative zero
 
+import math
 import numpy as np
+
 import opcodes as ops
+from console import Console
+from memory import Memory
 from registers import Registers
 np.set_printoptions(threshold=np.inf)
 
 
-
+class ZCPU:
-class ZombieCPU:
+    _halted = False
     _regs = Registers()
-    def __init__(self, memorysize=None, debug=None):
+    _mem = None
-        self._memorysize = memorysize
+
-        self._memory = np.zeros(memorysize)
+    def __init__(self, memory, debug=None):
+        print('Processor Init')
         self._debug = debug
-        
+        self._mem = memory
-        
+
     def reset(self):
-        if self._debug:
+        print('Processor Resetting')
-            print('Processor Reseting')
+        self._regs.sp = self._mem.size() - 1  # Set stackpointer
-        self._memory = np.zeros(self._memorysize) #clear memory
+        self._regs.ip = 0  # Set instruction pointer
-        
+
-        self._regs.esp = self._memorysize - 1 #set stackpointer
-        self._regs.eip = 256 #set instructiojn pointer #fuck you thomas
-        print(self._regs.eip)
     def exec(self):
-        Halted = False
+        while not self._halted:
-        while not Halted: #change this to if not halt
+            # Fetch instruction
+            opcode  = self._mem.read(self._regs.ip)
+            address = self._mem.read(self._regs.ip + 1)
+            value   = self._mem.read(self._regs.ip + 2)
 
-            #fetch
-            opcode = self._memory[int(self._regs.eip)]
-            address = self._memory[int(self._regs.eip + 1)]
-            value = self._memory[int(self._regs.eip + 2)]
-            
             if self._debug:
-                print(f'Opcode: {opcode}\nAddress: {address}\nValue: {value}\nIP: {self._regs.eip}')
+                print(f'Opcode: {opcode}\nAddress: {address}\nValue: {value}\nIP: {self._regs.ip}')
-            
+
-            if opcode == ops.NOP:
+            if opcode == ops.NOP:     # No-op
                 pass
-            
-            elif opcode == ops.HLT:
-                Halted = True
-                if self._debug:
-                	print('Processor Halted')
 
-            elif opcode == ops.RST: #reset
+            elif opcode == ops.HLT:     # Halt
+                self._halted = True
+
+            elif opcode == ops.RST:   # Reset
                 self.reset()
-            
-            elif opcode == ops.DBG: #debug toggle
-                self._debug = value
-                
-            elif opcode == ops.LDI: #mov but actually load immediate
-                self.write_memory(address, value)
-                self.flags_zero(value)
-                self.flags_negative(value)
 
-            elif opcode == ops.PUSH: #push
+            elif opcode == ops.DBG:   # Debug (nop if debug is not set)  -- This is stoopid
-                self.write_memory(self._regs.esp, value) #put value onto stack
+                if self._debug:
-                self._regs.esp -= 1 #dec stackpointer
+                    print(f'Opcode: {opcode}\nAddress: {address}\nValue: {value}')
-                
-            elif opcode == ops.POP: #pop
-                self.write_memory(address, self.read_memory_address(self._regs.esp + 1)) #read the last value and put it into address (not the empty space)
-                self._regs.esp += 1 #inc stackpointer
-            
-            elif opcode == ops.JMP:
-                self._regs.eip = address - 3
-                
-            elif opcode == ops.JZ:
-                if self._regs.flags & 0b00000001:
-                    self._regs.eip = address - 3
-            
-            elif opcode == ops.CMP:
-                self.flags_zero(address - value)
 
-            elif opcode == ops.INC:
+            elif opcode == ops.LDI:   # ldi
-                self.write_memory(address, self.read_memory_address(address) + 1)
+                self._mem.write(address, value)
-                self.flags_zero(self.read_memory_address(address))
-                self.flags_negative(self.read_memory_address(address))
-                
-            elif opcode == ops.DEC:
-                self.write_memory(address, self.read_memory_address(address) - 1)
-                self.flags_zero(self.read_memory_address(address))
-                self.flags_negative(self.read_memory_address(address))
-                
-            self._regs.eip += 3 #increment instruction pointer
-            
 
-    #flag shit
+            elif opcode == ops.PUSH:  # push
-    def read_flags(self, i):
+                self._mem.write(self._regs.sp, value)
-        return self._regs
+                self._regs.sp -= 1
 
-    def flags_zero(self, value):
+            elif opcode == ops.POP:   # pop
-        if value == 0:
+                self._regs.sp += 1
-            self._regs.flags = self._regs.flags | 0b00000001
+                self._mem.write(address, self._mem.read(self._regs.sp))
-        else:
+
-            self._regs.flags = self._regs.flags & ~0b00000001
+            else:
-    def flags_negative(self, value):
+                raise RuntimeException(f'Invalid Opcode: {opcode}')
-        if value < 0:
+
-            self._regs.flags = self._regs.flags | 0b00000010
+            #increment instruction pointer
-        else:
+            self._regs.ip += 3
-            self._regs.flags = self._regs.flags & ~0b00000010
 
 
-
-    #memory
-    def set_memory(self, memory):
-        self._memory = memory
-    def write_memory(self, address, value):
-        self._memory[int(address)] = value
-    def read_memory(self):
-        return self._memory
-    def read_memory_address(self, address):
-        return self._memory[int(address)]
-    
 if __name__ == "__main__":
-    cpu = ZombieCPU(65536, False)
-    cpu.reset()
-    
     #hard coded opcodes
-    cpu.write_memory(256, ops.LDI)    #mov
+    ram = Memory(65536)
-    cpu.write_memory(257, 27)   #address 27
+
-    cpu.write_memory(258, 105)  #105 into ^
+    ram.write(0, ops.LDI)
-    cpu.write_memory(259, ops.PUSH)    #push
+    ram.write(1, 100)
-    cpu.write_memory(260, 0)    #unused in this op  
+    ram.write(2, 5)
-    cpu.write_memory(261, 27)   #the value at address 27 onto the stack
+
-    cpu.write_memory(262, ops.POP)    #pop
+    ram.write(3, ops.PUSH)
-    cpu.write_memory(263, 100)  #into 100
+    ram.write(4, 0)
-    cpu.write_memory(264, 0)    #unused in this op
+    ram.write(5, 69)
-    cpu.write_memory(265, ops.CMP)
+
-    cpu.write_memory(266, 10)
+    ram.write(6, ops.POP)
-    cpu.write_memory(267, 11)   #should set the zero flag
+    ram.write(7, 101)
-    cpu.write_memory(268, ops.INC) #increment
+    ram.write(8, 0)
-    cpu.write_memory(269, 100)
+
-    cpu.write_memory(270, 0) #unused
+    ram.write(9, ops.DBG)
-    cpu.write_memory(271, ops.HLT)
+    ram.write(10, 1)
+    ram.write(11, 2)
+
+    ram.write(12, ops.HLT)
+    ram.write(13, 0)
+    ram.write(14, 0)
+
+    cpu = ZCPU(ram, False)
+    cpu.reset()
 
     cpu.exec()
-    
+
-    print(cpu.read_memory_address(100))
+    print(ram.read(100))
+    print(ram.read(101))
+    print(ram.read(102))
 
     #c = Console(cpu.read_memory()) ima finish this later
     #c.draw()
-    
+

memory.py

@@ -0,0 +1,27 @@
+import numpy as np
+
+class Memory:
+    def __init__(self, size):
+        self._memory = np.zeros(size)
+
+    def write(self, address, data):
+        address = int(address)
+        if 0 > address >= self._memory.size:
+            # TODO: Raise an exception and throw an interrupt here
+            raise RuntimeException('Invalid write address')
+
+        self._memory[address] = data
+
+    def read(self, address):
+        address = int(address)
+        if 0 > address >= self._memory.size:
+            # TODO: Raise an exception and throw an interrupt here
+            raise RuntimeException('Invalid write address')
+
+        return self._memory[address]
+
+    def clear(self, data=0):
+        self._memory.fill(data)
+
+    def size(self):
+        return self._memory.size

opcodes.py

@@ -1,12 +1,7 @@
-NOP     = 0 # No operation
+NOP  = 0  # No-op
-HLT     = 1 # Halt
+HLT  = 1  # Halt
-RST     = 2 # Reset
+RST  = 2  # Reset
-DBG     = 3 # Enables Debug
+DBG  = 3  # Debug
-LDI     = 4 # Load Immediate
+LDI  = 4  # Load Immediate
-PUSH    = 5 # Push
+PUSH = 5  # Push
-POP     = 6 # Pop 
+POP  = 6  # Pop
-JMP     = 7 # Jump to address
-JZ      = 8 # Jump to address if zero
-CMP     = 9 # Compare and set zero flag
-INC     = 10    # increment
-DEC     = 11    # decrement

registers.py

@@ -1,11 +1,11 @@
 class Registers:
-    eip = 0 # instruction pointer
+    ip = 0
-    eax = 0
+    ax = 0
-    ebx = 0
+    bx = 0
-    ecx = 0
+    cx = 0
-    edx = 0
+    dx = 0
-    esi = 0 # source
+    si = 0
-    edi = 0 # destination
+    di = 0
-    esp = 0 # stack pointer
+    sp = 0
-    ebp = 0
+    bp = 0
-    flags = 0b00000000	#flags ob
+    flags = 0