Re-created the fibonacci code and put programs into their own folder

fibonacci.bin

@@ -1 +0,0 @@
--n -e '\x20\x00\x10\x00\x50\x21\x01\x10\x01\x50\x00\x02\x76\x00\x02\x00\x00\x10\x01\x50\x00\x01\x00\x00\x50\x00\x02\x30\x08\x40\x0C\x00\x00' 

programs/README.md

@@ -0,0 +1,34 @@
+# MCS-4 Programs
+
+This directory contains binary program files for the Intel MCS-4 emulator.
+
+## Available Programs
+
+### fibonacci.bin
+- **Size:** 33 bytes (16 instructions × 2 bytes each + 1 extra byte)
+- **Description:** Fibonacci sequence generator
+- **Algorithm:** Calculates first 8 Fibonacci numbers using registers and RAM
+- **Instructions Used:** LDM, LD, WRM, IAC, ADD, JCN, NOP
+
+## Usage
+
+Programs are automatically loaded by the emulator. Use the `--file` option to specify a different program:
+
+```bash
+# Use default fibonacci program
+cargo run -- --system basic
+
+# Use specific program
+cargo run -- --system basic --file programs/myprogram.bin
+```
+
+## Adding New Programs
+
+1. Create your MCS-4 assembly program
+2. Assemble it into raw binary format (big-endian byte pairs)
+3. Save as `.bin` file in this directory
+4. Update this README with program details
+
+## Program Format
+
+MCS-4 programs are stored as raw binary data where each instruction is represented as 8-bit bytes. Multi-byte instructions (like addresses) use big-endian format.

src/main.rs

@@ -9,7 +9,7 @@ fn main() {
     // Parse command line arguments
     let args: Vec<String> = env::args().collect();
     let mut system_type = "basic".to_string();
-    let mut program_file = "fibonacci.bin".to_string();
+    let mut program_file = "programs/fibonacci.bin".to_string();
 
     let mut i = 1;
     while i < args.len() {
@@ -119,7 +119,7 @@ fn load_program_data(filename: &str) -> Result<Vec<u8>, String> {
         }
         Err(e) => {
             // If file doesn't exist, try to use default program
-            if filename == "fibonacci.bin" {
+            if filename == "programs/fibonacci.bin" {
                 println!(
                     "DEBUG: File {} not found ({}), using default fibonacci program",
                     filename, e