From c00c806c7fe248d006dfe44a7925ce1e969a7a30 Mon Sep 17 00:00:00 2001
From: Michael Preisach <michael@preisach.at>
Date: Tue, 22 May 2018 01:11:21 +0200
Subject: [PATCH] basic definition of data structure

---
 src/main.rs | 90 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 src/main.rs

diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..09980a0
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,90 @@
+use std::prelude;
+use std::ops::*;
+
+fn main() {
+    println!("Hello World!");
+    let mut s = Vec::new();
+    s.push(9);
+    println!("{}",s.pop().unwrap());
+}
+
+struct Cpu {
+    stack: Vec<u16>,
+    mem: Vec<u16>,
+    reg: Vec<u16>,
+    pc: Number,
+}
+
+impl Cpu {
+    fn new() -> Cpu {
+        Cpu {
+            stack: Vec::new(),
+            mem: Vec::with_capacity(32768),
+            reg: Vec::with_capacity(8),
+            pc: Number::new(),
+        }
+    }
+}
+
+//15Bit numbers for the ALU
+#[derive(Eq, PartialEq, Copy, Clone)]
+struct Number {
+    value: u16,
+}
+
+//Operator Overloading - Div not needed since it works without modification.
+impl Add for Number {
+    type Output = Number;
+    fn add(self, other: Number) -> Number {
+        Number {
+            value: (self.value + other.value) % 32768,
+        }
+    }
+}
+
+impl Sub for Number {
+    type Output = Number;
+    fn sub(self, other: Number) -> Number {
+        Number {
+            value: (self.value - other.value) % 32768,
+        }
+    }
+}
+
+impl Mul for Number {
+    type Output = Number;
+    fn mul(self, other: Number) -> Number {
+        Number {
+            value: (self.value * other.value) % 32768,
+        }
+    }
+}
+
+impl Not for Number {
+    type Output = Number;
+    fn not(self) -> Number {
+        Number {
+            value: (!self.value) % 32768,
+        }
+    }
+}
+
+impl Number {
+    //little Endian ->
+    fn new() -> Number {
+        Number {
+            value: 0,
+        }
+    }
+    fn get_first_byte(&self) -> u8 {
+        (self.value & 0xFF) as u8
+    }
+    fn get_second_byte(&self) -> u8 {
+        ((self.value >> 8) & 0x7F) as u8
+    }
+    fn set_bytes(&mut self, first: u8, second: u8) {
+        let mut newval:u16 = (second & 0x7F) as u16;
+        newval <<= 8;
+        self.value = newval + (first as u16);
+    }
+}