Small changes

.gitignore

@@ -1 +1,2 @@
 /target
+Cargo.lock

Cargo.lock

@@ -1,7 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-version = 3
-
-[[package]]
-name = "salt-n-vinegar"
-version = "0.1.0"

notes/registers.txt

@@ -0,0 +1,8 @@
+16 8-bit general registers, V0 -> VF
+1 16-bit register I, only 12 bits are used
+
+Program counter (PC) should be 16-bit, and is used to store the currently executing address. 
+The stack pointer (SP) can be 8-bit, it is used to point to the topmost level of the stack.
+The stack is an array of 16 16-bit values, used to store the address that the interpreter shoud return to when finished with a subroutine.
+Chip-8 allows for up to 16 levels of nested subroutines.
+

src/chip8.rs

@@ -0,0 +1,7 @@
+// Miscellanious registers
+static mut program_counter: u16 = 0;
+static mut stack_ptr: u8 = 0;
+
+// General purpose registers
+static mut registers: [u8; 16] = [0; 16];
+