diff --git a/core/src/cartridge/backup/backup_file.rs b/core/src/cartridge/backup/backup_file.rs
index adfb320..d8a8165 100644
--- a/core/src/cartridge/backup/backup_file.rs
+++ b/core/src/cartridge/backup/backup_file.rs
@@ -64,7 +64,7 @@ impl<'de> Deserialize<'de> for BackupFile {
             }
         }
 
-        const FIELDS: &'static [&'static str] = &["size", "path"];
+        const FIELDS: &[&str] = &["size", "path"];
         deserializer.deserialize_struct("BackupFile", FIELDS, BackupFileVisitor)
     }
 }
@@ -75,7 +75,7 @@ impl BackupFile {
         let mut file: Option<File> = None;
         let buffer = if let Some(path) = &path {
             if !path.is_file() {
-                write_bin_file(&path, &vec![0xff; size]).unwrap();
+                write_bin_file(path, &vec![0xff; size]).unwrap();
             }
 
             let mut _file = OpenOptions::new()
@@ -98,8 +98,8 @@ impl BackupFile {
         BackupFile {
             size,
             path,
-            file: file,
-            buffer: buffer,
+            file,
+            buffer,
         }
     }
 
diff --git a/core/src/cartridge/backup/eeprom.rs b/core/src/cartridge/backup/eeprom.rs
index f590c5a..b7de9c3 100644
--- a/core/src/cartridge/backup/eeprom.rs
+++ b/core/src/cartridge/backup/eeprom.rs
@@ -95,7 +95,7 @@ impl EepromChip {
     fn new(eeprom_type: EepromType, mut memory: BackupFile) -> EepromChip {
         memory.resize(eeprom_type.size());
         EepromChip {
-            memory: memory,
+            memory,
             addr_bits: eeprom_type.bits(),
 
             state: SpiState::RxInstruction,
@@ -130,7 +130,7 @@ impl EepromChip {
     fn fill_tx_buffer(&mut self) {
         let mut tx_buffer = 0u64;
         for i in 0..8 {
-            tx_buffer = tx_buffer << 8;
+            tx_buffer <<= 8;
             tx_buffer |= self.memory.read(self.address + i) as u64;
         }
         self.tx_buffer = tx_buffer;
@@ -152,10 +152,8 @@ impl EepromChip {
             RxInstruction => {
                 // If instruction was recvd, proceed to recv the address
                 if self.rx_count >= 2 {
-                    let insn = SpiInstruction::from_u64(self.rx_buffer).expect(&format!(
-                        "invalid spi command {:#010b}",
-                        self.rx_buffer as u8
-                    ));
+                    let insn = SpiInstruction::from_u64(self.rx_buffer).unwrap_or_else(|| panic!("invalid spi command {:#010b}",
+                        self.rx_buffer as u8));
                     next_state = Some(RxAddress(insn));
                     self.reset_rx_buffer();
                 }
@@ -193,7 +191,7 @@ impl EepromChip {
                     for i in 0..8 {
                         self.memory
                             .write(self.address + (7 - i), (data & 0xff) as u8);
-                        data = data >> 8;
+                        data >>= 8;
                     }
                     next_state = Some(StopBit(Write));
                     self.reset_rx_buffer();
@@ -445,7 +443,7 @@ mod tests {
             let mut byte = value[i];
             for j in 0..8 {
                 let bit = byte >> 7;
-                byte = byte << 1;
+                byte <<= 1;
                 bit_stream[8 + i * 8 + j] = bit as u16;
             }
         }
@@ -464,11 +462,11 @@ mod tests {
         {
             let mut chip = spi.chip.borrow_mut();
             let bytes = chip.memory.bytes_mut();
-            bytes[16] = 'T' as u8;
-            bytes[17] = 'E' as u8;
-            bytes[18] = 'S' as u8;
-            bytes[19] = 'T' as u8;
-            bytes[20] = '!' as u8;
+            bytes[16] = b'T';
+            bytes[17] = b'E';
+            bytes[18] = b'S';
+            bytes[19] = b'T';
+            bytes[20] = b'!';
             drop(bytes);
             chip.memory.flush();
         }
diff --git a/core/src/cartridge/backup/flash.rs b/core/src/cartridge/backup/flash.rs
index 6ea655e..d3731d2 100644
--- a/core/src/cartridge/backup/flash.rs
+++ b/core/src/cartridge/backup/flash.rs
@@ -76,12 +76,12 @@ impl Flash {
         let memory = BackupFile::new(size, flash_path);
 
         Flash {
-            chip_id: chip_id,
+            chip_id,
             wrseq: FlashWriteSequence::Initial,
             mode: FlashMode::Initial,
-            size: size,
+            size,
             bank: 0,
-            memory: memory,
+            memory,
         }
     }
 
@@ -144,12 +144,14 @@ impl Flash {
     #[inline]
     fn flash_offset(&self, offset: usize) -> usize {
         let offset = (offset & 0xffff) as usize;
-        return self.bank * BANK_SIZE + offset;
+        self.bank * BANK_SIZE + offset
     }
 
     pub fn read(&self, addr: u32) -> u8 {
         let offset = (addr & 0xffff) as usize;
-        let result = if self.mode == FlashMode::ChipId {
+        
+
+        if self.mode == FlashMode::ChipId {
             match offset {
                 0 => (self.chip_id & 0xff) as u8,
                 1 => (self.chip_id >> 8) as u8,
@@ -157,9 +159,7 @@ impl Flash {
             }
         } else {
             self.memory.read(self.flash_offset(offset))
-        };
-
-        result
+        }
     }
 
     pub fn write(&mut self, addr: u32, value: u8) {
diff --git a/core/src/cartridge/backup/mod.rs b/core/src/cartridge/backup/mod.rs
index 9c6a423..cbab666 100644
--- a/core/src/cartridge/backup/mod.rs
+++ b/core/src/cartridge/backup/mod.rs
@@ -6,7 +6,7 @@ pub use backup_file::BackupFile;
 pub mod eeprom;
 pub mod flash;
 
-#[derive(Debug, Primitive, Serialize, Deserialize, Copy, Clone, PartialEq)]
+#[derive(Debug, Primitive, Serialize, Deserialize, Copy, Clone, PartialEq, Eq)]
 pub enum BackupType {
     Eeprom = 0,
     Sram = 1,
diff --git a/core/src/cartridge/builder.rs b/core/src/cartridge/builder.rs
index addaa24..684ce99 100644
--- a/core/src/cartridge/builder.rs
+++ b/core/src/cartridge/builder.rs
@@ -109,7 +109,7 @@ impl GamepakBuilder {
                 LoadRom::Raw(data) => Ok((data, None)),
             }
         } else if let Some(path) = &self.path {
-            match load_from_file(&path)? {
+            match load_from_file(path)? {
                 #[cfg(feature = "elf_support")]
                 LoadRom::Elf { data, symbols } => Ok((data, Some(symbols))),
                 LoadRom::Raw(data) => Ok((data, None)),
@@ -187,17 +187,17 @@ impl GamepakBuilder {
 
         let size = bytes.len();
         Ok(Cartridge {
-            header: header,
-            gpio: gpio,
+            header,
+            gpio,
             bytes: bytes.into_boxed_slice(),
-            size: size,
-            backup: backup,
-            symbols: symbols,
+            size,
+            backup,
+            symbols,
         })
     }
 }
 
-const BACKUP_FILE_EXT: &'static str = "sav";
+const BACKUP_FILE_EXT: &str = "sav";
 fn create_backup(backup_type: BackupType, rom_path: Option<PathBuf>) -> BackupMedia {
     let backup_path = if let Some(rom_path) = rom_path {
         Some(rom_path.with_extension(BACKUP_FILE_EXT))
@@ -216,7 +216,7 @@ fn create_backup(backup_type: BackupType, rom_path: Option<PathBuf>) -> BackupMe
 }
 
 fn detect_backup_type(bytes: &[u8]) -> Option<BackupType> {
-    const ID_STRINGS: &'static [&'static str] =
+    const ID_STRINGS: &[&str] =
         &["EEPROM", "SRAM", "FLASH_", "FLASH512_", "FLASH1M_"];
 
     for i in 0..5 {
diff --git a/core/src/cartridge/gpio.rs b/core/src/cartridge/gpio.rs
index fba4cc0..0449e8c 100644
--- a/core/src/cartridge/gpio.rs
+++ b/core/src/cartridge/gpio.rs
@@ -4,7 +4,7 @@ use super::{GPIO_PORT_CONTROL, GPIO_PORT_DATA, GPIO_PORT_DIRECTION};
 use bit::BitIndex;
 use serde::{Deserialize, Serialize};
 
-#[derive(Serialize, Deserialize, Copy, Clone, Debug, PartialEq)]
+#[derive(Serialize, Deserialize, Copy, Clone, Debug, PartialEq, Eq)]
 pub enum GpioDirection {
     /// GPIO to GBA
     In = 0,
diff --git a/core/src/cartridge/header.rs b/core/src/cartridge/header.rs
index 67c6bd7..d527d04 100644
--- a/core/src/cartridge/header.rs
+++ b/core/src/cartridge/header.rs
@@ -83,7 +83,7 @@ pub fn parse(bytes: &[u8]) -> GBAResult<CartridgeHeader> {
         game_code: String::from(game_code),
         maker_code: String::from(maker_code),
         software_version: bytes[0xbc],
-        checksum: checksum,
+        checksum,
         // ram_entry_point: ram_entry_point,
         // joybus_entry_point: joybus_entry_point,
     })
diff --git a/core/src/cartridge/rtc.rs b/core/src/cartridge/rtc.rs
index 309e33b..8311fac 100644
--- a/core/src/cartridge/rtc.rs
+++ b/core/src/cartridge/rtc.rs
@@ -18,7 +18,7 @@ fn num2bcd(mut num: u8) -> u8 {
     while num > 0 {
         let x = num % 10;
         bcd += x * digit;
-        digit = digit << 4;
+        digit <<= 4;
         num /= 10;
     }
     bcd
@@ -168,7 +168,7 @@ impl SerialBuffer {
             } else {
                 (1 << self.counter) - 1
             };
-            Some(self.byte & u8::from(mask))
+            Some(self.byte & mask)
         }
     }
 
@@ -236,7 +236,7 @@ impl Rtc {
             RegisterKind::DateTime => {
                 let local: DateTime<Local> = Local::now();
                 let year = local.year();
-                assert!(year >= 2000 && year <= 2099); // Wonder if I will live to see this one fail
+                assert!((2000..=2099).contains(&year)); // Wonder if I will live to see this one fail
 
                 let hour = if self.status.mode_24h() {
                     local.hour()
@@ -498,16 +498,16 @@ mod tests {
     use super::*;
 
     fn transmit(rtc: &mut Rtc, gpio_state: &GpioState, bit: u8) {
-        rtc.write(&gpio_state, 0b0100_u16 | (u16::from(bit) << 1));
-        rtc.write(&gpio_state, 0b0101_u16);
+        rtc.write(gpio_state, 0b0100_u16 | (u16::from(bit) << 1));
+        rtc.write(gpio_state, 0b0101_u16);
     }
 
     fn receive_bytes(rtc: &mut Rtc, gpio_state: &GpioState, bytes: &mut [u8]) {
         for byte in bytes.iter_mut() {
             for i in 0..8 {
-                rtc.write(&gpio_state, 0b0100_u16);
-                let data = rtc.read(&gpio_state);
-                rtc.write(&gpio_state, 0b0101_u16);
+                rtc.write(gpio_state, 0b0100_u16);
+                let data = rtc.read(gpio_state);
+                rtc.write(gpio_state, 0b0101_u16);
                 byte.set_bit(i, data.bit(Port::Sio.index()));
             }
         }
@@ -523,11 +523,11 @@ mod tests {
         assert_eq!(rtc.state, RtcState::Idle);
 
         // set CS low,
-        rtc.write(&gpio_state, 0b0001);
+        rtc.write(gpio_state, 0b0001);
         assert_eq!(rtc.state, RtcState::WaitForChipSelectHigh);
 
         // set CS high, SCK rising edge
-        rtc.write(&gpio_state, 0b0101);
+        rtc.write(gpio_state, 0b0101);
         assert_eq!(rtc.state, RtcState::GetCommandByte);
     }
 
diff --git a/core/src/dma.rs b/core/src/dma.rs
index e32f282..bf40e89 100644
--- a/core/src/dma.rs
+++ b/core/src/dma.rs
@@ -39,7 +39,7 @@ impl DmaChannel {
             panic!("invalid dma id {}", id);
         }
         DmaChannel {
-            id: id,
+            id,
             irq: Interrupt::from_usize(id + 8).unwrap(),
             running: false,
             src: 0,
@@ -115,7 +115,7 @@ impl DmaChannel {
             self.running = false;
         }
         self.ctrl = ctrl;
-        return start_immediately;
+        start_immediately
     }
 
     fn transfer(&mut self, sb: &mut SysBus) {
diff --git a/core/src/gba.rs b/core/src/gba.rs
index f1fbdf3..bf06260 100644
--- a/core/src/gba.rs
+++ b/core/src/gba.rs
@@ -112,13 +112,13 @@ impl GameBoyAdvance {
             io_devs,
 
             #[cfg(not(feature = "no_video_interface"))]
-            video_device: video_device,
-            audio_device: audio_device,
-            input_device: input_device,
+            video_device,
+            audio_device,
+            input_device,
 
-            scheduler: scheduler,
+            scheduler,
 
-            interrupt_flags: interrupt_flags,
+            interrupt_flags,
         };
 
         gba.sysbus.init(gba.cpu.weak_ptr());
@@ -160,15 +160,15 @@ impl GameBoyAdvance {
 
         Ok(GameBoyAdvance {
             cpu: arm7tdmi,
-            sysbus: sysbus,
+            sysbus,
             io_devs,
 
             interrupt_flags: interrupts,
 
             #[cfg(not(feature = "no_video_interface"))]
-            video_device: video_device,
-            audio_device: audio_device,
-            input_device: input_device,
+            video_device,
+            audio_device,
+            input_device,
 
             scheduler,
         })
diff --git a/core/src/gpu/layer.rs b/core/src/gpu/layer.rs
index 9e5b7a4..c3d8d6c 100644
--- a/core/src/gpu/layer.rs
+++ b/core/src/gpu/layer.rs
@@ -25,7 +25,7 @@ impl RenderLayerKind {
     }
 }
 
-#[derive(Debug, PartialEq, Clone, Copy)]
+#[derive(Debug, PartialEq, Eq, Clone, Copy)]
 pub struct RenderLayer {
     pub kind: RenderLayerKind,
     pub priority: u16,
@@ -36,23 +36,23 @@ impl RenderLayer {
     pub fn background(bg: usize, pixel: Rgb15, priority: u16) -> RenderLayer {
         RenderLayer {
             kind: RenderLayerKind::from_usize(1 << bg).unwrap(),
-            pixel: pixel,
-            priority: priority,
+            pixel,
+            priority,
         }
     }
 
     pub fn objects(pixel: Rgb15, priority: u16) -> RenderLayer {
         RenderLayer {
             kind: RenderLayerKind::Objects,
-            pixel: pixel,
-            priority: priority,
+            pixel,
+            priority,
         }
     }
 
     pub fn backdrop(pixel: Rgb15) -> RenderLayer {
         RenderLayer {
             kind: RenderLayerKind::Backdrop,
-            pixel: pixel,
+            pixel,
             priority: 4,
         }
     }
diff --git a/core/src/gpu/mod.rs b/core/src/gpu/mod.rs
index d65d46e..c315784 100644
--- a/core/src/gpu/mod.rs
+++ b/core/src/gpu/mod.rs
@@ -39,8 +39,8 @@ use std::fmt;
 pub mod consts {
     pub use super::VRAM_ADDR;
     pub const VIDEO_RAM_SIZE: usize = 128 * 1024;
-    pub const PALETTE_RAM_SIZE: usize = 1 * 1024;
-    pub const OAM_SIZE: usize = 1 * 1024;
+    pub const PALETTE_RAM_SIZE: usize = 1024;
+    pub const OAM_SIZE: usize = 1024;
 
     pub const DISPLAY_WIDTH: usize = 240;
     pub const DISPLAY_HEIGHT: usize = 160;
diff --git a/core/src/gpu/regs.rs b/core/src/gpu/regs.rs
index 25f4033..835ceae 100644
--- a/core/src/gpu/regs.rs
+++ b/core/src/gpu/regs.rs
@@ -10,7 +10,7 @@ pub trait GpuMemoryMappedIO {
     fn write(&mut self, value: u16);
 }
 
-#[derive(Debug, PartialEq)]
+#[derive(Debug, PartialEq, Eq)]
 pub enum ObjMapping {
     TwoDimension,
     OneDimension,
@@ -112,7 +112,7 @@ impl GpuMemoryMappedIO for DisplayStatus {
     }
     #[inline]
     fn read(&self) -> u16 {
-        u16::from(self.vblank_flag) << 0
+        u16::from(self.vblank_flag)
             | u16::from(self.hblank_flag) << 1
             | u16::from(self.vcount_flag) << 2
             | u16::from(self.vblank_irq_enable) << 3
@@ -136,7 +136,7 @@ pub struct BgControl {
 impl GpuMemoryMappedIO for BgControl {
     #[inline]
     fn write(&mut self, value: u16) {
-        self.priority = (value >> 0) & 0b11;
+        self.priority = value & 0b11;
         self.character_base_block = (value >> 2) & 0b11;
         self.mosaic = (value >> 6) & 1 != 0;
         self.palette256 = (value >> 7) & 1 != 0;
@@ -231,7 +231,7 @@ impl BlendFlags {
     }
 }
 
-#[derive(SmartDefault, Debug, Serialize, Deserialize, Primitive, PartialEq, Clone, Copy)]
+#[derive(SmartDefault, Debug, Serialize, Deserialize, Primitive, PartialEq, Eq, Clone, Copy)]
 pub enum BlendMode {
     #[default]
     BldNone = 0b00,
@@ -250,14 +250,14 @@ pub struct BlendControl {
 impl GpuMemoryMappedIO for BlendControl {
     #[inline]
     fn write(&mut self, value: u16) {
-        self.target1 = BlendFlags::from_bits_truncate((value >> 0) & 0x3f);
+        self.target1 = BlendFlags::from_bits_truncate(value & 0x3f);
         self.target2 = BlendFlags::from_bits_truncate((value >> 8) & 0x3f);
         self.mode = BlendMode::from_u16((value >> 6) & 0b11).unwrap_or_else(|| unreachable!());
     }
 
     #[inline]
     fn read(&self) -> u16 {
-        (self.target1.bits() << 0) | (self.mode as u16) << 6 | (self.target2.bits() << 8)
+        self.target1.bits() | (self.mode as u16) << 6 | (self.target2.bits() << 8)
     }
 }
 
diff --git a/core/src/gpu/render.rs b/core/src/gpu/render.rs
index eed2449..d5b3724 100644
--- a/core/src/gpu/render.rs
+++ b/core/src/gpu/render.rs
@@ -15,8 +15,8 @@ impl ViewPort {
     pub fn new(w: i32, h: i32) -> ViewPort {
         ViewPort {
             origin: (0, 0),
-            w: w,
-            h: h,
+            w,
+            h,
         }
     }
 
diff --git a/core/src/gpu/render/obj.rs b/core/src/gpu/render/obj.rs
index b76b6b7..dc09846 100644
--- a/core/src/gpu/render/obj.rs
+++ b/core/src/gpu/render/obj.rs
@@ -72,7 +72,7 @@ impl Gpu {
 
     fn read_obj_attrs(&mut self, obj: usize) -> ObjAttrs {
         let addr = ATTRS_SIZE * (obj as u32);
-        let attr0 = Attribute0(self.oam.read_16(addr + 0));
+        let attr0 = Attribute0(self.oam.read_16(addr));
         let attr1 = Attribute1(self.oam.read_16(addr + 2));
         let attr2 = Attribute2(self.oam.read_16(addr + 4));
         ObjAttrs(attr0, attr1, attr2)
@@ -305,7 +305,7 @@ impl Gpu {
     }
 }
 
-#[derive(Debug, Primitive, Copy, Clone, PartialEq)]
+#[derive(Debug, Primitive, Copy, Clone, PartialEq, Eq)]
 pub enum ObjMode {
     Normal = 0b00,
     Sfx = 0b01,
diff --git a/core/src/gpu/render/text.rs b/core/src/gpu/render/text.rs
index b90a6b0..10b3df7 100644
--- a/core/src/gpu/render/text.rs
+++ b/core/src/gpu/render/text.rs
@@ -80,7 +80,7 @@ impl Gpu {
                     }
                     se_row = 0;
                     if bg_width == 512 {
-                        sbb = sbb ^ 1;
+                        sbb ^= 1;
                     }
                 }
             };
diff --git a/core/src/gpu/rgb15.rs b/core/src/gpu/rgb15.rs
index 107ab10..862cb83 100644
--- a/core/src/gpu/rgb15.rs
+++ b/core/src/gpu/rgb15.rs
@@ -4,7 +4,7 @@ use serde::{Deserialize, Serialize};
 
 bitfield! {
     #[repr(transparent)]
-    #[derive(Serialize, Deserialize, Copy, Clone, Default, PartialEq)]
+    #[derive(Serialize, Deserialize, Copy, Clone, Default, PartialEq, Eq)]
     pub struct Rgb15(u16);
     impl Debug;
     pub r, set_r: 4, 0;
diff --git a/core/src/gpu/window.rs b/core/src/gpu/window.rs
index 9e8a497..3cd76ba 100644
--- a/core/src/gpu/window.rs
+++ b/core/src/gpu/window.rs
@@ -57,7 +57,7 @@ impl Window {
     }
 }
 
-#[derive(Debug, PartialEq, Copy, Clone)]
+#[derive(Debug, PartialEq, Eq, Copy, Clone)]
 pub enum WindowType {
     Win0,
     Win1,
diff --git a/core/src/interrupt.rs b/core/src/interrupt.rs
index 34226dd..35d1fb4 100644
--- a/core/src/interrupt.rs
+++ b/core/src/interrupt.rs
@@ -8,7 +8,7 @@ pub trait InterruptConnect {
     fn connect_irq(&mut self, interrupt_flags: SharedInterruptFlags);
 }
 
-#[derive(Serialize, Deserialize, Debug, Primitive, Copy, Clone, PartialEq)]
+#[derive(Serialize, Deserialize, Debug, Primitive, Copy, Clone, PartialEq, Eq)]
 #[allow(non_camel_case_types)]
 pub enum Interrupt {
     LCD_VBlank = 0,
@@ -77,7 +77,7 @@ impl IrqBitmask {
 }
 
 bitfield! {
-    #[derive(Serialize, Deserialize, Default, Copy, Clone, PartialEq)]
+    #[derive(Serialize, Deserialize, Default, Copy, Clone, PartialEq, Eq)]
     pub struct IrqBitmask(u16);
     impl Debug;
     u16;
diff --git a/core/src/iodev.rs b/core/src/iodev.rs
index b482783..2714bd2 100644
--- a/core/src/iodev.rs
+++ b/core/src/iodev.rs
@@ -17,7 +17,7 @@ use serde::{Deserialize, Serialize};
 
 use self::consts::*;
 
-#[derive(Serialize, Deserialize, Debug, Clone, Copy, PartialEq)]
+#[derive(Serialize, Deserialize, Debug, Clone, Copy, PartialEq, Eq)]
 pub enum HaltState {
     Running,
     Halt, // In Halt mode, the CPU is paused as long as (IE AND IF)=0,
@@ -67,7 +67,7 @@ impl IoDevices {
             keyinput: keypad::KEYINPUT_ALL_RELEASED,
             waitcnt: WaitControl(0),
             debug: DebugPort::new(),
-            scheduler: scheduler,
+            scheduler,
             sysbus_ptr: Default::default(),
         }
     }
@@ -82,13 +82,13 @@ impl InterruptConnect for IoDevices {
         self.intc.connect_irq(interrupt_flags.clone());
         self.gpu.connect_irq(interrupt_flags.clone());
         self.dmac.connect_irq(interrupt_flags.clone());
-        self.timers.connect_irq(interrupt_flags.clone());
+        self.timers.connect_irq(interrupt_flags);
     }
 }
 
 impl SchedulerConnect for IoDevices {
     fn connect_scheduler(&mut self, scheduler: SharedScheduler) {
-        self.scheduler = scheduler.clone();
+        self.scheduler = scheduler;
     }
 }
 
@@ -336,7 +336,7 @@ impl DebugRead for IoDevices {
 }
 
 bitfield! {
-    #[derive(Serialize, Deserialize, Default, Copy, Clone, PartialEq)]
+    #[derive(Serialize, Deserialize, Default, Copy, Clone, PartialEq, Eq)]
     pub struct WaitControl(u16);
     impl Debug;
     u16;
diff --git a/core/src/keypad.rs b/core/src/keypad.rs
index f8749a1..db3a1da 100644
--- a/core/src/keypad.rs
+++ b/core/src/keypad.rs
@@ -1,4 +1,4 @@
-#[derive(Debug, Primitive, PartialEq)]
+#[derive(Debug, Primitive, PartialEq, Eq)]
 #[repr(u8)]
 pub enum Keys {
     ButtonA = 0,
@@ -16,7 +16,7 @@ pub enum Keys {
 pub const NUM_KEYS: usize = 10;
 pub const KEYINPUT_ALL_RELEASED: u16 = 0b1111111111;
 
-#[derive(Debug, Primitive, PartialEq)]
+#[derive(Debug, Primitive, PartialEq, Eq)]
 #[repr(u8)]
 pub enum KeyState {
     Pressed = 0,
diff --git a/core/src/lib.rs b/core/src/lib.rs
index 5f687f8..670c21c 100644
--- a/core/src/lib.rs
+++ b/core/src/lib.rs
@@ -9,7 +9,7 @@ extern crate debug_stub_derive;
 
 #[macro_use]
 extern crate enum_primitive_derive;
-use num_traits;
+
 
 #[macro_use]
 extern crate bitfield;
@@ -27,7 +27,7 @@ extern crate smart_default;
 
 extern crate cfg_if;
 
-use zip;
+
 
 use std::error::Error;
 use std::fmt;
diff --git a/core/src/sound/dsp.rs b/core/src/sound/dsp.rs
index 897cfb0..b0d7893 100644
--- a/core/src/sound/dsp.rs
+++ b/core/src/sound/dsp.rs
@@ -29,7 +29,7 @@ impl Resampler for CosineResampler {
             output.push((left, right));
             self.phase += self.in_freq / self.out_freq;
         }
-        self.phase = self.phase - 1.0;
+        self.phase -= 1.0;
         self.last_in_sample = s;
     }
 }
@@ -39,8 +39,8 @@ impl CosineResampler {
         CosineResampler {
             last_in_sample: Default::default(),
             phase: 0.0,
-            in_freq: in_freq,
-            out_freq: out_freq,
+            in_freq,
+            out_freq,
         }
     }
 }
diff --git a/core/src/sound/mod.rs b/core/src/sound/mod.rs
index feffbaa..86525e4 100644
--- a/core/src/sound/mod.rs
+++ b/core/src/sound/mod.rs
@@ -133,7 +133,7 @@ impl SoundController {
             sample_rate: 32_768f32,
             dma_sound: [Default::default(), Default::default()],
 
-            resampler: resampler,
+            resampler,
             output_buffer: Vec::with_capacity(1024),
         }
     }
@@ -196,11 +196,9 @@ impl SoundController {
                     info!("MSE enabled!");
                     self.mse = true;
                 }
-            } else {
-                if self.mse {
-                    info!("MSE disabled!");
-                    self.mse = false;
-                }
+            } else if self.mse {
+                info!("MSE disabled!");
+                self.mse = false;
             }
 
             // other fields of this register are read-only anyway, ignore them.
diff --git a/core/src/sysbus.rs b/core/src/sysbus.rs
index b4227f9..9e4f050 100644
--- a/core/src/sysbus.rs
+++ b/core/src/sysbus.rs
@@ -227,10 +227,10 @@ impl SysBus {
     /// must be called whenever this object is instanciated
     pub fn init(&mut self, arm_core: WeakPointer<Arm7tdmiCore<SysBus>>) {
         self.arm_core = arm_core.clone();
-        self.bios.connect_arm_core(arm_core.clone());
+        self.bios.connect_arm_core(arm_core);
         let ptr = SysBusPtr::new(self as *mut SysBus);
         // HACK
-        self.io.set_sysbus_ptr(ptr.clone());
+        self.io.set_sysbus_ptr(ptr);
     }
 
     pub fn on_waitcnt_written(&mut self, waitcnt: WaitControl) {
@@ -281,7 +281,7 @@ impl SysBus {
                 match (r15 >> 24) as usize {
                     PAGE_BIOS | PAGE_OAM => {
                         // TODO this is probably wrong, according to GBATEK, we should be using $+6 here but it isn't prefetched yet.
-                        value = value << 16;
+                        value <<= 16;
                         value |= decoded;
                     }
                     PAGE_IWRAM => {
@@ -291,7 +291,7 @@ impl SysBus {
                             value |= decoded << 16;
                         } else {
                             // LSW = OldLO, MSW = [$+4]   ;for opcodes at non-4-byte aligned locations
-                            value = value << 16;
+                            value <<= 16;
                             value |= decoded;
                         }
                     }
diff --git a/core/src/timer.rs b/core/src/timer.rs
index d474d57..101f578 100644
--- a/core/src/timer.rs
+++ b/core/src/timer.rs
@@ -31,7 +31,7 @@ impl Timer {
             panic!("invalid timer id {}", timer_id);
         }
         Timer {
-            timer_id: timer_id,
+            timer_id,
             irq: Interrupt::from_usize(timer_id + 3).unwrap(),
             interrupt_flags,
             data: 0,
@@ -78,7 +78,7 @@ impl Timer {
 
             let ticks_remaining = self.ticks_to_overflow();
             num_overflows += ticks / ticks_remaining;
-            ticks = ticks % ticks_remaining;
+            ticks %= ticks_remaining;
 
             if self.ctl.irq_enabled() {
                 interrupt::signal_irq(&self.interrupt_flags, self.irq);
@@ -160,11 +160,8 @@ impl Timers {
         if id != 3 {
             let next_timer_id = id + 1;
             let next_timer = &mut self.timers[next_timer_id];
-            if next_timer.ctl.cascade() {
-                if next_timer.update(1) > 0 {
-                    drop(next_timer);
-                    self.handle_timer_overflow(next_timer_id, apu, dmac);
-                }
+            if next_timer.ctl.cascade() && next_timer.update(1) > 0 {
+                self.handle_timer_overflow(next_timer_id, apu, dmac);
             }
         }
         if id == 0 || id == 1 {