From 95dde6e2c9295eefe7298f4ce028cd21648ed426 Mon Sep 17 00:00:00 2001
From: Jan-Peter von Hunnius <jan@hunnius.net>
Date: Mon, 29 Sep 2025 12:48:35 +0200
Subject: [PATCH] Re-created the fibonacci code and put programs into their own
 folder

---
 fibonacci.bin          |   1 -
 programs/README.md     |  34 ++++++++++++++++++++++++++++++++++
 programs/fibonacci.bin | Bin 0 -> 33 bytes
 src/main.rs            |   4 ++--
 4 files changed, 36 insertions(+), 3 deletions(-)
 delete mode 100644 fibonacci.bin
 create mode 100644 programs/README.md
 create mode 100644 programs/fibonacci.bin

diff --git a/fibonacci.bin b/fibonacci.bin
deleted file mode 100644
index a875cfe..0000000
--- a/fibonacci.bin
+++ /dev/null
@@ -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' 
diff --git a/programs/README.md b/programs/README.md
new file mode 100644
index 0000000..17f9b54
--- /dev/null
+++ b/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.
\ No newline at end of file
diff --git a/programs/fibonacci.bin b/programs/fibonacci.bin
new file mode 100644
index 0000000000000000000000000000000000000000..f9c38472326a1b2cdd146933aae89f3db2582303
GIT binary patch
literal 33
kcmY#j5MT&UWE5ZwU|=d^U}9hZu^1T`fLsF(2Ob6n05J9fwg3PC

literal 0
HcmV?d00001

diff --git a/src/main.rs b/src/main.rs
index af35b5e..deee288 100644
--- a/src/main.rs
+++ b/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