Fixed things

main.py

@@ -1,119 +1,104 @@
 #  made by zombie
 #  02/01/21
 
-#0-255 is internal registers and flags and etc
-# program execcution starts at 256
-#stack starts at 65535 FILO
-
-#0  IP      #Instruction Pointer
-#1	EAX
-#2	EBX
-#3	ECX
-#4	EDX
-#5	ESI
-#6	EDI
-#7	ESP     #stack pointer
-#8	EBP
-#9  FLAG    #Read-Only contains the flags
-
-
-#list of opcodes
-#0 interrupt
-#1 reset
-#2 debug info (nop)
-#3 mov
-#4 push (onto stack)
-#5 pop  (off of stack into address)
-
-
 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:
+    _halted = False
+    _regs = Registers()
+    _mem = None
 
-class Zomcpu:
-    def __init__(self, memorysize=None, debug=None):
+    def __init__(self, memory, debug=None):
         print('Processor Init')
-        self._memorysize = memorysize
-        self._memory = np.zeros(memorysize)
         self._debug = debug
+        self._mem = memory
 
     def reset(self):
         print('Processor Resetting')
-        self._memory = np.zeros(self._memorysize) #clear memory
-        
-        self._memory[7] = self._memorysize - 1 #set stackpointer
-        self._memory[0] = 256 #set instructiojn pointer
+        self._regs.sp = self._mem.size() - 1  # Set stackpointer
+        self._regs.ip = 0  # Set instruction pointer
 
     def exec(self):
-        Go = 1
-        while Go: #change this to if not halt
-            #fetch
-            opcode = self._memory[int(self._memory[0])]
-            address = self._memory[int(self._memory[0] + 1)]
-            value = self._memory[int(self._memory[0] + 2)]
+        while not self._halted:
+            # 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)
 
             if self._debug:
-                print(f'Opcode: {opcode}\nAddress: {address}\nValue: {value}\nIP: {self._memory[0]}')
+                print(f'Opcode: {opcode}\nAddress: {address}\nValue: {value}\nIP: {self._regs.ip}')
 
-            if opcode == 0:
-                Go = value
-                if value == 0:
-                    print('Processor Halted')
+            if opcode == ops.NOP:     # No-op
+                pass
 
-            elif opcode == 1: #reset
+            elif opcode == ops.HLT:     # Halt
+                self._halted = True
+
+            elif opcode == ops.RST:   # Reset
                 self.reset()
 
-            elif opcode == 2: #debug (nop if debug is not set)
+            elif opcode == ops.DBG:   # Debug (nop if debug is not set)  -- This is stoopid
                 if self._debug:
                     print(f'Opcode: {opcode}\nAddress: {address}\nValue: {value}')
 
-            elif opcode == 3: #mov
-                self.write_memory(address, value)
+            elif opcode == ops.LDI:   # ldi
+                self._mem.write(address, value)
 
-            elif opcode == 4: #push
-                self.write_memory(self._memory[7], value) #put value onto stack
-                self.write_memory(7, self._memory[7] - 1) #dec stackpointer
+            elif opcode == ops.PUSH:  # push
+                self._mem.write(self._regs.sp, value)
+                self._regs.sp -= 1
 
-            elif opcode == 5: #pop
-                self.write_memory(address, self.read_memory_address(self._memory[7] + 1)) #read the last value and put it into address (not the empty space)
-                self.write_memory(7, self._memory[7] + 1) #inc stackpointer
+            elif opcode == ops.POP:   # pop
+                self._regs.sp += 1
+                self._mem.write(address, self._mem.read(self._regs.sp))
 
-            self._memory[0] += 3 #increment instruction pointer
+            else:
+                raise RuntimeException(f'Invalid Opcode: {opcode}')
 
+            #increment instruction pointer
+            self._regs.ip += 3
 
-    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 = Zomcpu(65536, True)
+    #hard coded opcodes
+    ram = Memory(65536)
+
+    ram.write(0, ops.LDI)
+    ram.write(1, 100)
+    ram.write(2, 5)
+
+    ram.write(3, ops.PUSH)
+    ram.write(4, 0)
+    ram.write(5, 69)
+
+    ram.write(6, ops.POP)
+    ram.write(7, 101)
+    ram.write(8, 0)
+
+    ram.write(9, ops.DBG)
+    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()
 
-    #hard coded opcodes
-    cpu.write_memory(256, 3)    #mov
-    cpu.write_memory(257, 27)   #address 27
-    cpu.write_memory(258, 105)  #105 into ^
-    cpu.write_memory(259, 4)    #push
-    cpu.write_memory(260, 0)    #unused in this op  
-    cpu.write_memory(261, 27)   #the value at address 27 onto the stack
-    cpu.write_memory(262, 5)    #pop
-    cpu.write_memory(263, 100)  #into 100
-    cpu.write_memory(264, 0)    #unused in this op
-    
-    
-
     cpu.exec()
-    print(cpu.read_memory_address(100))
-    print(cpu.read_memory_address(264))
-    print(cpu.read_memory_address(7))
+
+    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

@@ -0,0 +1,7 @@
+NOP  = 0  # No-op
+HLT  = 1  # Halt
+RST  = 2  # Reset
+DBG  = 3  # Debug
+LDI  = 4  # Load Immediate
+PUSH = 5  # Push
+POP  = 6  # Pop

registers.py

@@ -0,0 +1,11 @@
+class Registers:
+    ip = 0
+    ax = 0
+    bx = 0
+    cx = 0
+    dx = 0
+    si = 0
+    di = 0
+    sp = 0
+    bp = 0
+    flags = 0