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--- notes:asm:cpumem [2011/02/17 02:13] – jr018429
+++ notes:asm:cpumem [2011/05/18 23:30] (current) – jr018429
@@ Line 1: / Line 1: @@
+====== CPUMEM ======
+class library is included before the main function like this:\\
+<code>
+#include "cpumem.h"
+</code>
+\\
+CPUMEM::CPUMEM() is the constructor and automatically creates memory of the correct size, 64k (65536 elements, 0-65535), and type 1 byte (8-bits) for the 8085. The constructor is called automatically as the object is being instantiated.\\
+An object of the type CPUMEM is instatiated like this:\\
+\\
+<code>
+//Instantiates an object of type CPUMEM
+CPUMEM cpumemory;
+</code>
+\\
+CPUMEM::~CPUMEM() is the destructor and automatically deallocates the memory which was created when an object of type CPUMEM when an object of this type goes out of scope.\\
+\\
+unsigned char& CPUMEM::operator[](unsigned short int address) is a depricated member function. It uses overloaded operators to make the code that calls this method look like an array. **Do NOT use it.**\\
+\\
+unsigned char CPUMEM::read(unsigned short int address) is the member function that is used to read the 8-bit (unsigned char) value at a specific address.\\
+The **read** member function is used like this:\\
+<code>
+//reads 8-bit data from last memory address, 0xffff, or 65535
+unsigned char value = cpumemory.read(0xffff);
+</code>
+\\
+void CPUMEM::write(unsigned short int address, unsigned char value) is the member function that is used to write an 8-bit value to a specific address.\\
+The **write** member function is used like this:\\
+<code>
+//writes the value 0xff, or 255, to the last memory address 0xffff, or 65535
+cpumemory.write(0xffff, 0xff);
+</code>
+\\
+**or.h**\\
+<code>
+#ifndef _OR_H
+#define _OR_H
+class OR
+{
+        public:
+                OR();
+                void set();
+                void set(bool);
+                void set(bool, bool);
+                bool get();
+        private:
+                bool input1;
+                bool input2;
+};
+#endif
+</code>
+\\
+**ortest.cc**\\
+#include <cstdio>
+#include "or.h"
+int main()
+{
+        bool a, b;
+        a = true, b = false;
+        printf("--------------------\n");
+        printf("TRUE is: %d\n", true);
+        printf("FALSE is: %d\n", false);
+        printf("--------------------\n\n");
+        OR myOrGate;
+        printf(" a b | x \n");
+        printf("-----+---\n");
+        for(int temp = 0; temp <=3; temp++)
+        {
+                a = temp & 0x02;
+                b = temp & 0x01;
+                //if(temp & 0x02) a = true;
+                //else a = false;
+                //if(temp & 0x01) b = true;
+                //else b = false;
+                ////switch(temp)
+                ////{
+                ////    case 0:
+                ////            a = false;
+                ////            b = false;
+                ////            break;
+                ////    case 1:
+                ////            a = false;
+                ////            b = true;
+                ////            break;
+                ////    case 2:
+                ////            a = true;
+                ////            b = false;
+                ////            break;
+                ////    case 3:
+                ////            a = true;
+                ////            b = true;
+                ////            break;
+                ////}
+                myOrGate.set(a, b);
+                printf(" %d %d | %d\n", a, b, myOrGate.get());
+        }
+        printf("---------\n");
+        return(0);
+}
+</code>
+\\
+Makefile
+<code>
+CXX = g++ $(CXXFLAGS) $(INC)
+CXXFLAGS = -Wall
+INC = -I ../../include/
+SRC = or.cc
+OBJ = $(SRC:.cc=.o)
+all: $(SRC) $(OBJ)
+debug: CXX += -DDEBUG -g
+debug: DEBUG = debug
+debug: $(SRC) $(OBJ)
+.cc.o:
+ifneq ($(MAKECMDGOALS),debug)
+        @printf "[B]   %-20s ... " "$<"
+        @$(CXX) -c $< && echo "OK" || echo "FAIL"
+else
+        $(CXX) -c $<
+endif
+clean:
+        rm -f *.o $(OBJ) core
+</code>

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