From 01117af4113157c6de79c0e766b3bea897ebb170 Mon Sep 17 00:00:00 2001
From: Jan-Peter von Hunnius <jan@hunnius.net>
Date: Wed, 24 Sep 2025 17:39:11 +0200
Subject: [PATCH] Reset instead of setting program counter

---
 src/components/cpu/intel_4004.rs |  8 ++++----
 src/main.rs                      |  6 +-----
 src/systems/intel_mcs_4.rs       | 14 +-------------
 3 files changed, 6 insertions(+), 22 deletions(-)

diff --git a/src/components/cpu/intel_4004.rs b/src/components/cpu/intel_4004.rs
index 87dc456..468e130 100644
--- a/src/components/cpu/intel_4004.rs
+++ b/src/components/cpu/intel_4004.rs
@@ -193,7 +193,7 @@ impl Intel4004 {
         self.program_counter.inc();
 
         // Every 10 cycles, "calculate" next Fibonacci number
-        if self.cycle_count % 10 == 0 {
+        if self.cycle_count % 1000 == 0 {
             // Simple Fibonacci simulation
             let fib_index = (self.cycle_count / 10) as u8;
             self.accumulator = self.simulate_fibonacci(fib_index);
@@ -207,12 +207,12 @@ impl Intel4004 {
             _ => {
                 let mut a = 0;
                 let mut b = 1;
-                for _ in 2..=n {
-                    let next = a + b;
+                for _ in 2..=n%32 {
+                    let next: u32 = a + b;
                     a = b;
                     b = next;
                 }
-                b % 16 // Keep it in 4-bit range for demo
+                (b % 16) as u8 // Keep it in 4-bit range for demo
             }
         }
     }
diff --git a/src/main.rs b/src/main.rs
index 90bb9be..f14a300 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -40,11 +40,7 @@ fn main() {
         return;
     }
 
-    // Set starting program counter
-    if let Err(e) = mcs4.set_cpu_program_counter(U12::from(0x000)) {
-        eprintln!("Failed to set program counter: {}", e);
-        return;
-    }
+    mcs4.reset_system();
 
     // Display system information
     let info = mcs4.get_system_info();
diff --git a/src/systems/intel_mcs_4.rs b/src/systems/intel_mcs_4.rs
index 3215ccb..68e9102 100644
--- a/src/systems/intel_mcs_4.rs
+++ b/src/systems/intel_mcs_4.rs
@@ -9,7 +9,6 @@ use crate::component::Component;
 use crate::components::memory::intel_4001::Intel4001;
 use crate::components::memory::intel_4002::Intel4002;
 use crate::pin::Pin;
-use crate::types::U12;
 
 pub struct IntelMcs4 {
     components: HashMap<String, Arc<Mutex<dyn Component>>>,
@@ -147,18 +146,6 @@ impl IntelMcs4 {
 
         Err("RAM component not found".to_string())
     }
-    pub fn set_cpu_program_counter(&mut self, address: U12) -> Result<(), String> {
-        if let Some(cpu_component) = self.components.get_mut("cpu") {
-            if let Some(cpu) = cpu_component.as_any_mut().downcast_mut::<Intel4004>() {
-                cpu.program_counter = address;
-                Ok(())
-            } else {
-                Err("CPU component is not of type Intel 4004".to_string())
-            }
-        } else {
-            Err("CPU component not found".to_string())
-        }
-    }
     pub fn get_cpu_state(&self) -> Result<CpuState, String> {
         if let Some(cpu_component) = self.components.get("cpu") {
             if let Some(cpu) = cpu_component.as_any().downcast_ref::<Intel4004>() {
@@ -257,6 +244,7 @@ impl Component for IntelMcs4 {
 
     fn stop(&mut self) {
         self.stop();
+
     }
 
     fn is_running(&self) -> bool {