From 8422925312cf5d64d0411378e19444254d51541a Mon Sep 17 00:00:00 2001
From: august <august@klinegareth.com>
Date: Fri, 2 Feb 2024 13:44:15 -0500
Subject: [PATCH] Added writing binary file to memory

---
 src/main.rs | 69 ++++++++++++++++++++++++++++++-----------------------
 1 file changed, 39 insertions(+), 30 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 15cffa1..a762028 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,6 +1,13 @@
 #![allow(dead_code)]
-use core::panic;
-use std::{collections::HashMap, ptr::addr_of, thread::sleep, time::Duration, u16};
+use std::{
+    collections::HashMap,
+    fs::{self, File},
+    io::Read,
+    path::PathBuf,
+    thread::sleep,
+    time::Duration,
+    u16,
+};
 
 type Byte = u8;
 type Word = u16;
@@ -27,7 +34,7 @@ impl MemArea {
         }
     }
     fn contains(&self, address: Word) -> bool {
-        self.start <= address && self.end >= address
+        self.start <= address && self.end > address
     }
     fn swap_page(&mut self, page: usize) -> Result<(), MappingError> {
         match page > self.pages {
@@ -53,6 +60,7 @@ struct Mem {
 enum MemoryError {
     Unmapped,
     NoDataAtAddress,
+    Unwritable,
 }
 
 #[derive(Debug)]
@@ -98,6 +106,17 @@ impl Mem {
         }
         Err(MemoryError::Unmapped)
     }
+
+    fn from_bin(&mut self, f: File) -> Result<(), MemoryError> {
+        let bytes = f.bytes();
+        for (address, byte) in bytes.enumerate() {
+            match byte {
+                Ok(value) => self.write(address as u16, value)?,
+                Err(_) => return Err(MemoryError::Unwritable),
+            }
+        }
+        Ok(())
+    }
 }
 #[derive(Debug)]
 enum ExecutionError {
@@ -312,6 +331,9 @@ impl Cpu {
                                     "Cpu tried to read from address {:#06x} but there was no data",
                                     self.pc
                                 ),
+                                _ => {
+                                    unimplemented!()
+                                }
                             },
                             ExecutionError::InterruptsDisabled => panic!("InterruptsDisabled"),
                             ExecutionError::IncompatibleAddrMode => {
@@ -3396,44 +3418,31 @@ impl Opcode {
 
 fn main() {
     let ram = MemArea::new(0x0000, 0x3FFF, 2, "ram".into());
-    let rom = MemArea::new(0xE000, 0xFFFF, 4, "rom".into());
+    let control = MemArea::new(0x4000, 0x5FFF, 4, "rom".into());
     let vram = MemArea::new(0x6000, 0xDFFF, 1, "vram".into());
+    let rom = MemArea::new(0xE000, 0xFFFF, 4, "rom".into());
     let mut memory = Mem::new(ram);
-    match memory.add_area(rom) {
-        Err(error) => println!("Error adding rom: {:?}", error),
+    match memory.add_area(control) {
+        Err(error) => println!("Error adding vram: {:?}", error),
         Ok(()) => {}
     };
     match memory.add_area(vram) {
         Err(error) => println!("Error adding vram: {:?}", error),
         Ok(()) => {}
     };
-    match memory.write(0xFFFC, 0x00) {
-        Err(error) => println!("Error writing to memory at address 0xFFFC: {:?}", error),
+    match memory.add_area(rom) {
+        Err(error) => println!("Error adding rom: {:?}", error),
         Ok(()) => {}
     };
-    match memory.write(0xFFFD, 0x00) {
-        Err(error) => println!("Error writing to memory at address 0xFFFD: {:?}", error),
-        Ok(()) => {}
+    let binary = match fs::File::open(PathBuf::from(
+        "/Users/kline/projects/winter/georgeemu/src/george.bin",
+    )) {
+        Ok(file) => file,
+        Err(error) => panic!("Couldn't open binary file! {:?}", error),
     };
-    match memory.write(0x0000, 0xEA) {
-        Err(error) => println!("Error writing to memory at address 0x0000: {:?}", error),
-        Ok(()) => {}
-    };
-    match memory.write(0x0001, 0xA0) {
-        Err(error) => println!("Error writing to memory at address 0x0000: {:?}", error),
-        Ok(()) => {}
-    };
-    match memory.write(0x0002, 0xAE) {
-        Err(error) => println!("Error writing to memory at address 0x0000: {:?}", error),
-        Ok(()) => {}
-    };
-    match memory.write(0x0003, 0xA2) {
-        Err(error) => println!("Error writing to memory at address 0x0000: {:?}", error),
-        Ok(()) => {}
-    };
-    match memory.write(0x0004, 0xA2) {
-        Err(error) => println!("Error writing to memory at address 0x0000: {:?}", error),
-        Ok(()) => {}
+    match memory.from_bin(binary) {
+        Err(error) => println!("{:?}", error),
+        Ok(_) => {}
     };
     let mut cpu = Cpu::new(memory);
     match cpu.reset() {