From 96ea02db8906a20c82a9765e33270f1e12e8ae2b Mon Sep 17 00:00:00 2001
From: BayThylacine <ethan.r.turner@gmail.com>
Date: Fri, 14 Feb 2025 19:13:32 +1100
Subject: [PATCH] fixed the graphical issue

---
 src/main.rs | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 0aaa0d7..4c0b518 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -155,10 +155,13 @@ impl Chip8 {
                     self.registers[0x0f] = 0;
                     for n in 0..opcodes[3] {
                         let spritedata = self.ram[self.index_register as usize + n as usize];
-                        for i in 0..7 {
+                        let mut checkdata: u8 = 0;
+                        for i in 0..8 {
                             let bit = get_bit_u8(spritedata, i);
+                            checkdata += (bit as u8) << (7 - i);
                             self.display[(y + n) as usize] = self.display[(y + n) as usize] ^ ((bit as u64) << (x + i));
                         }
+                        //info!("{},{}", spritedata, checkdata);
                     }
                 },
                 0x0e => {
@@ -229,9 +232,12 @@ fn main() {
                 _ => {}
             },
             Event::MainEventsCleared => {
-                info!(chip8.pc);
+                //info!(chip8.pc);
                 chip8.update(40);
-                info!(chip8.pc);
+                //info!(chip8.pc);
+                //for i in chip8.display {
+                //    println!("{:#64b}", i);
+                //}
                 window.request_redraw();
             }
             Event::RedrawRequested(_) => {
@@ -297,8 +303,9 @@ fn get_bit(num: u64, bit: u8) -> bool {
 
 fn get_bit_u8(num: u8, bit: u8) -> bool {
     if bit <= 8 {
-        let mask: u8 = 128 >> bit;
+        let mask: u8 = 1 << (7 - bit);
         let bitvalue = (num & mask) != 0;
+        //info!("{},{},{},{}", num, bit, mask, bitvalue);
         bitvalue
     } else {
         false