diff --git a/Cargo.toml b/Cargo.toml
index 8520793..0ad98b1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,7 +9,7 @@ members = [
     "platform/rustboyadvance-jni",
     "fps_bench"
 ]
-
+resolver = "1"
 default-members = ["platform/rustboyadvance-sdl2"]
 
 [profile.dev]
diff --git a/arm7tdmi/build.rs b/arm7tdmi/build.rs
index 33eeeae..80e3757 100644
--- a/arm7tdmi/build.rs
+++ b/arm7tdmi/build.rs
@@ -42,7 +42,7 @@ fn thumb_decode(i: u16) -> (&'static str, String) {
     } else if i & 0xfc00 == 0x4000 {
         (
             "AluOps",
-            format!("exec_thumb_alu_ops::<{OP}>", OP = i.bit_range(6..10) as u16),
+            format!("exec_thumb_alu_ops::<{OP}>", OP = i.bit_range(6..10)),
         )
     } else if i & 0xfc00 == 0x4400 {
         (
@@ -424,11 +424,11 @@ fn main() {
     // TODO - don't do this in the build script and use `const fn` instead when it becomes stable
     let out_dir = env::var_os("OUT_DIR").unwrap();
     let thumb_lut_path = Path::new(&out_dir).join("thumb_lut.rs");
-    let mut thumb_lut_file = fs::File::create(&thumb_lut_path).expect("failed to create file");
+    let mut thumb_lut_file = fs::File::create(thumb_lut_path).expect("failed to create file");
     generate_thumb_lut(&mut thumb_lut_file).expect("failed to generate thumb table");
 
     let arm_lut_path = Path::new(&out_dir).join("arm_lut.rs");
-    let mut arm_lut_file = fs::File::create(&arm_lut_path).expect("failed to create file");
+    let mut arm_lut_file = fs::File::create(arm_lut_path).expect("failed to create file");
     generate_arm_lut(&mut arm_lut_file).expect("failed to generate arm table");
 
     println!("cargo:rerun-if-changed=build.rs");
diff --git a/arm7tdmi/src/alu.rs b/arm7tdmi/src/alu.rs
index 9d0a897..d23996d 100644
--- a/arm7tdmi/src/alu.rs
+++ b/arm7tdmi/src/alu.rs
@@ -77,7 +77,7 @@ impl BarrelShifterValue {
     /// Decode operand2 as an immediate value
     pub fn decode_rotated_immediate(&self) -> Option<u32> {
         if let BarrelShifterValue::RotatedImmediate(immediate, rotate) = self {
-            return Some(immediate.rotate_right(*rotate) as u32);
+            return Some(immediate.rotate_right(*rotate));
         }
         None
     }
@@ -163,7 +163,7 @@ impl<I: MemoryInterface> Arm7tdmiCore<I> {
     pub fn rrx(&mut self, val: u32, carry: &mut bool) -> u32 {
         let old_c = *carry as i32;
         *carry = val & 0b1 != 0;
-        (((val as u32) >> 1) as i32 | (old_c << 31)) as u32
+        ((val >> 1) as i32 | (old_c << 31)) as u32
     }
 
     pub fn ror(
@@ -189,7 +189,7 @@ impl<I: MemoryInterface> Arm7tdmiCore<I> {
                 } else {
                     val
                 };
-                *carry = (val as u32).bit(31);
+                *carry = (val).bit(31);
                 val
             }
         }
@@ -265,7 +265,7 @@ impl<I: MemoryInterface> Arm7tdmiCore<I> {
             let rs = offset.bit_range(8..12) as usize;
             self.shift_by_register(op, reg, rs, carry)
         } else {
-            let amount = offset.bit_range(7..12) as u32;
+            let amount = offset.bit_range(7..12);
             self.barrel_shift_op(op, self.get_reg(reg), amount, carry, true)
         }
     }
@@ -284,12 +284,12 @@ impl<I: MemoryInterface> Arm7tdmiCore<I> {
     pub fn get_barrel_shifted_value(&mut self, sval: &BarrelShifterValue, carry: &mut bool) -> u32 {
         // TODO decide if error handling or panic here
         match sval {
-            BarrelShifterValue::ImmediateValue(offset) => *offset as u32,
+            BarrelShifterValue::ImmediateValue(offset) => *offset,
             BarrelShifterValue::ShiftedRegister(shifted_reg) => {
-                let added = (*shifted_reg).added.unwrap_or(true);
-                let abs = self.register_shift(shifted_reg, carry) as u32;
+                let added = (shifted_reg).added.unwrap_or(true);
+                let abs = self.register_shift(shifted_reg, carry);
                 if added {
-                    abs as u32
+                    abs
                 } else {
                     (-(abs as i32)) as u32
                 }
diff --git a/arm7tdmi/src/arm/exec.rs b/arm7tdmi/src/arm/exec.rs
index ef3984d..11db301 100644
--- a/arm7tdmi/src/arm/exec.rs
+++ b/arm7tdmi/src/arm/exec.rs
@@ -8,7 +8,6 @@ use crate::{
 
 use MemoryAccess::*;
 
-use super::ArmDecodeHelper;
 use super::*;
 
 impl<I: MemoryInterface> Arm7tdmiCore<I> {
@@ -177,7 +176,7 @@ impl<I: MemoryInterface> Arm7tdmiCore<I> {
                 let rs = insn.bit_range(8..12) as usize;
                 ShiftRegisterBy::ByRegister(rs)
             } else {
-                let amount = insn.bit_range(7..12) as u32;
+                let amount = insn.bit_range(7..12);
                 ShiftRegisterBy::ByAmount(amount)
             };
 
@@ -240,7 +239,7 @@ impl<I: MemoryInterface> Arm7tdmiCore<I> {
 
         let mut result = CpuAction::AdvancePC(Seq);
         if let Some(alu_res) = alu_res {
-            self.set_reg(rd, alu_res as u32);
+            self.set_reg(rd, alu_res);
             if rd == REG_PC {
                 // T bit might have changed
                 match self.cpsr.state() {
@@ -290,7 +289,7 @@ impl<I: MemoryInterface> Arm7tdmiCore<I> {
                 self.register_shift_const::<BS_OP, SHIFT_BY_REG>(offset, rm as usize, &mut carry);
         }
         let offset = if ADD {
-            offset as u32
+            offset
         } else {
             (-(offset as i32)) as u32
         };
@@ -411,7 +410,7 @@ impl<I: MemoryInterface> Arm7tdmiCore<I> {
 
         if LOAD {
             let data = match transfer_type {
-                ArmHalfwordTransferType::SignedByte => self.load_8(addr, NonSeq) as u8 as i8 as u32,
+                ArmHalfwordTransferType::SignedByte => self.load_8(addr, NonSeq) as u32,
                 ArmHalfwordTransferType::SignedHalfwords => self.ldr_sign_half(addr, NonSeq),
                 ArmHalfwordTransferType::UnsignedHalfwords => self.ldr_half(addr, NonSeq),
             };
@@ -599,7 +598,7 @@ impl<I: MemoryInterface> Arm7tdmiCore<I> {
         }
 
         if writeback {
-            self.set_reg(base_reg, addr as u32);
+            self.set_reg(base_reg, addr);
         }
 
         result
@@ -705,7 +704,7 @@ impl<I: MemoryInterface> Arm7tdmiCore<I> {
         } else {
             let t = self.ldr_word(base_addr, NonSeq);
             self.store_aligned_32(base_addr, self.get_reg(insn.rm()), Seq);
-            self.set_reg(rd, t as u32);
+            self.set_reg(rd, t);
         }
         self.idle_cycle();
 
diff --git a/arm7tdmi/src/cpu.rs b/arm7tdmi/src/cpu.rs
index 913424b..297162c 100644
--- a/arm7tdmi/src/cpu.rs
+++ b/arm7tdmi/src/cpu.rs
@@ -4,7 +4,7 @@ use log::debug;
 use serde::{Deserialize, Serialize};
 use bit::BitIndex;
 use num::FromPrimitive;
-use ansi_term::{Colour, Style};
+use ansi_term::{Style};
 
 use rustboyadvance_utils::{Shared, WeakPointer};
 
diff --git a/arm7tdmi/src/disass.rs b/arm7tdmi/src/disass.rs
index c178e78..c7e85fe 100644
--- a/arm7tdmi/src/disass.rs
+++ b/arm7tdmi/src/disass.rs
@@ -42,7 +42,7 @@ where
         let mut line = String::new();
 
         let addr = self.base + self.pos as Addr;
-        let decoded: D = D::decode_from_bytes(&self.bytes[(self.pos as usize)..], addr);
+        let decoded: D = D::decode_from_bytes(&self.bytes[(self.pos)..], addr);
         let decoded_raw = decoded.get_raw();
         self.pos += self.word_size;
         write!(&mut line, "{addr:8x}:\t{decoded_raw:08x} \t{decoded}").unwrap();
diff --git a/arm7tdmi/src/thumb/exec.rs b/arm7tdmi/src/thumb/exec.rs
index 93cb02d..8e988b0 100644
--- a/arm7tdmi/src/thumb/exec.rs
+++ b/arm7tdmi/src/thumb/exec.rs
@@ -5,9 +5,6 @@ use crate::{
     Arm7tdmiCore, CpuAction,
 };
 
-use bit::BitIndex;
-
-use super::ThumbDecodeHelper;
 use super::*;
 use MemoryAccess::*;
 
@@ -59,7 +56,7 @@ impl<I: MemoryInterface> Arm7tdmiCore<I> {
             self.alu_add_flags(op1, op2, &mut carry, &mut overflow)
         };
         self.alu_update_flags(result, true, carry, overflow);
-        self.set_reg(rd, result as u32);
+        self.set_reg(rd, result);
 
         CpuAction::AdvancePC(Seq)
     }
@@ -84,7 +81,7 @@ impl<I: MemoryInterface> Arm7tdmiCore<I> {
         let arithmetic = op == ADD || op == SUB;
         self.alu_update_flags(result, arithmetic, carry, overflow);
         if op != CMP {
-            self.gpr[RD] = result as u32;
+            self.gpr[RD] = result;
         }
 
         CpuAction::AdvancePC(Seq)
@@ -144,7 +141,7 @@ impl<I: MemoryInterface> Arm7tdmiCore<I> {
         self.alu_update_flags(result, op.is_arithmetic(), carry, overflow);
 
         if !op.is_setting_flags() {
-            self.set_reg(rd, result as u32);
+            self.set_reg(rd, result);
         }
 
         CpuAction::AdvancePC(Seq)
@@ -189,7 +186,7 @@ impl<I: MemoryInterface> Arm7tdmiCore<I> {
                 self.alu_update_flags(result, true, carry, overflow);
             }
             OpFormat5::MOV => {
-                self.set_reg(dst_reg, op2 as u32);
+                self.set_reg(dst_reg, op2);
                 if dst_reg == REG_PC {
                     self.reload_pipeline16();
                     result = CpuAction::PipelineFlushed;
@@ -333,7 +330,7 @@ impl<I: MemoryInterface> Arm7tdmiCore<I> {
         if LOAD {
             let data = self.ldr_half(addr, NonSeq);
             self.idle_cycle();
-            self.gpr[rd] = data as u32;
+            self.gpr[rd] = data;
             CpuAction::AdvancePC(Seq)
         } else {
             self.store_aligned_16(addr, self.gpr[rd] as u16, NonSeq);
@@ -541,7 +538,7 @@ impl<I: MemoryInterface> Arm7tdmiCore<I> {
     /// Format 18
     /// Execution Time: 2S+1N
     pub(in super::super) fn exec_thumb_branch(&mut self, insn: u16) -> CpuAction {
-        let offset = ((insn.offset11() << 21) >> 20) as i32;
+        let offset = (insn.offset11() << 21) >> 20;
         self.pc = (self.pc as i32).wrapping_add(offset) as u32;
         self.reload_pipeline16(); // 2S + 1N
         CpuAction::PipelineFlushed
diff --git a/core/src/bios.rs b/core/src/bios.rs
index a3427ef..e8344ad 100644
--- a/core/src/bios.rs
+++ b/core/src/bios.rs
@@ -57,7 +57,7 @@ impl BusIO for Bios {
     #[inline]
     fn read_16(&mut self, addr: Addr) -> u16 {
         if self.read_allowed() {
-            self.rom.read_16(addr) as u16
+            self.rom.read_16(addr)
         } else {
             (self.last_opcode >> ((addr & 2) << 3)) as u16
         }
diff --git a/core/src/cartridge/backup/backup_file.rs b/core/src/cartridge/backup/backup_file.rs
index d8a8165..a92f258 100644
--- a/core/src/cartridge/backup/backup_file.rs
+++ b/core/src/cartridge/backup/backup_file.rs
@@ -81,7 +81,7 @@ impl BackupFile {
             let mut _file = OpenOptions::new()
                 .read(true)
                 .write(true)
-                .open(&path)
+                .open(path)
                 .unwrap();
 
             let mut buffer = Vec::new();
diff --git a/core/src/cartridge/backup/eeprom.rs b/core/src/cartridge/backup/eeprom.rs
index 826282f..9edf19e 100644
--- a/core/src/cartridge/backup/eeprom.rs
+++ b/core/src/cartridge/backup/eeprom.rs
@@ -1,6 +1,5 @@
 use super::{BackupFile, BackupMemoryInterface};
 
-use bytesize;
 use num::FromPrimitive;
 use serde::{Deserialize, Serialize};
 
@@ -66,12 +65,6 @@ enum SpiState {
     RxData,
 }
 
-impl Default for SpiState {
-    fn default() -> SpiState {
-        SpiState::RxInstruction
-    }
-}
-
 #[derive(Serialize, Deserialize, Clone, Debug)]
 pub struct EepromChip {
     memory: BackupFile,
@@ -255,10 +248,7 @@ impl EepromChip {
 
     pub(crate) fn is_transmitting(&self) -> bool {
         use SpiState::*;
-        match self.state {
-            TxData | TxDummy => true,
-            _ => false,
-        }
+        matches!(self.state, TxData | TxDummy)
     }
 
     pub(crate) fn reset(&mut self) {
@@ -288,7 +278,7 @@ impl EepromController {
         let mut detect = true;
         let mut eeprom_type = EepromType::Eeprom512;
         if let Some(path) = &path {
-            if let Ok(metadata) = fs::metadata(&path) {
+            if let Ok(metadata) = fs::metadata(path) {
                 let human_size = bytesize::ByteSize::b(metadata.len());
                 let assumed_type = match metadata.len() {
                     512 => EepromType::Eeprom512,
diff --git a/core/src/cartridge/backup/flash.rs b/core/src/cartridge/backup/flash.rs
index 93a7d92..363e812 100644
--- a/core/src/cartridge/backup/flash.rs
+++ b/core/src/cartridge/backup/flash.rs
@@ -39,9 +39,9 @@ pub enum FlashSize {
     Flash128k,
 }
 
-impl Into<usize> for FlashSize {
-    fn into(self) -> usize {
-        match self {
+impl From<FlashSize> for usize {
+    fn from(val: FlashSize) -> Self {
+        match val {
             FlashSize::Flash64k => 64 * 1024,
             FlashSize::Flash128k => 128 * 1024,
         }
@@ -143,7 +143,7 @@ impl Flash {
     /// Returns the phyiscal offset inside the flash file according to the selected bank
     #[inline]
     fn flash_offset(&self, offset: usize) -> usize {
-        let offset = (offset & 0xffff) as usize;
+        let offset = offset & 0xffff;
         self.bank * BANK_SIZE + offset
     }
 
diff --git a/core/src/cartridge/builder.rs b/core/src/cartridge/builder.rs
index 80790ca..a4075cd 100644
--- a/core/src/cartridge/builder.rs
+++ b/core/src/cartridge/builder.rs
@@ -34,6 +34,12 @@ pub struct GamepakBuilder {
     create_backup_file: bool,
 }
 
+impl Default for GamepakBuilder {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl GamepakBuilder {
     pub fn new() -> GamepakBuilder {
         GamepakBuilder {
@@ -199,11 +205,7 @@ impl GamepakBuilder {
 
 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))
-    } else {
-        None
-    };
+    let backup_path = rom_path.map(|rom_path| rom_path.with_extension(BACKUP_FILE_EXT));
     match backup_type {
         BackupType::Flash | BackupType::Flash512 => {
             BackupMedia::Flash(Flash::new(backup_path, FlashSize::Flash64k))
@@ -220,10 +222,7 @@ fn detect_backup_type(bytes: &[u8]) -> Option<BackupType> {
 
     for i in 0..5 {
         let search = TwoWaySearcher::new(ID_STRINGS[i].as_bytes());
-        match search.search_in(bytes) {
-            Some(_) => return Some(BackupType::from_u8(i as u8).unwrap()),
-            _ => {}
-        }
+        if let Some(_) = search.search_in(bytes) { return Some(BackupType::from_u8(i as u8).unwrap()) }
     }
     None
 }
diff --git a/core/src/cartridge/mod.rs b/core/src/cartridge/mod.rs
index 1b543ed..154cbc6 100644
--- a/core/src/cartridge/mod.rs
+++ b/core/src/cartridge/mod.rs
@@ -103,10 +103,7 @@ use super::sysbus::consts::*;
 pub const EEPROM_BASE_ADDR: u32 = 0x0DFF_FF00;
 
 fn is_gpio_access(addr: u32) -> bool {
-    match addr & 0x1ff_ffff {
-        GPIO_PORT_DATA | GPIO_PORT_DIRECTION | GPIO_PORT_CONTROL => true,
-        _ => false,
-    }
+    matches!(addr & 0x1ff_ffff, GPIO_PORT_DATA | GPIO_PORT_DIRECTION | GPIO_PORT_CONTROL)
 }
 
 impl BusIO for Cartridge {
@@ -122,7 +119,7 @@ impl BusIO for Cartridge {
                 if offset >= self.size {
                     self.read_unused(addr)
                 } else {
-                    unsafe { *self.bytes.get_unchecked(offset as usize) }
+                    unsafe { *self.bytes.get_unchecked(offset) }
                 }
             }
         }
diff --git a/core/src/cartridge/rtc.rs b/core/src/cartridge/rtc.rs
index 8311fac..591359e 100644
--- a/core/src/cartridge/rtc.rs
+++ b/core/src/cartridge/rtc.rs
@@ -223,10 +223,7 @@ impl Rtc {
 
     fn serial_transfer_in_progress(&self) -> bool {
         use RtcState::*;
-        match self.state {
-            Idle | WaitForChipSelectHigh => false,
-            _ => true,
-        }
+        !matches!(self.state, Idle | WaitForChipSelectHigh)
     }
 
     /// Loads a register contents into an internal buffer
diff --git a/core/src/gba.rs b/core/src/gba.rs
index 9d67b77..76731d7 100644
--- a/core/src/gba.rs
+++ b/core/src/gba.rs
@@ -2,7 +2,6 @@
 use std::cell::Cell;
 use std::rc::Rc;
 
-use bincode;
 use serde::{Deserialize, Serialize};
 
 use crate::gdb_support::{gdb_thread::start_gdb_server_thread, DebuggerRequestHandler};
@@ -19,7 +18,7 @@ use super::timer::Timers;
 
 use super::sound::interface::DynAudioInterface;
 
-use arm7tdmi::{self, Arm7tdmiCore};
+use arm7tdmi::{Arm7tdmiCore};
 use rustboyadvance_utils::Shared;
 
 pub struct GameBoyAdvance {
diff --git a/core/src/gdb_support.rs b/core/src/gdb_support.rs
index 7f117bb..d511c1b 100644
--- a/core/src/gdb_support.rs
+++ b/core/src/gdb_support.rs
@@ -111,7 +111,7 @@ impl DebuggerRequestHandler {
                     data.len(),
                     addr
                 );
-                gba.cpu.write_addrs(*addr, &data)?;
+                gba.cpu.write_addrs(*addr, data)?;
                 self.complete_request(None)
             }
             Interrupt => {
diff --git a/core/src/gpu/layer.rs b/core/src/gpu/layer.rs
index c3d8d6c..09b4c54 100644
--- a/core/src/gpu/layer.rs
+++ b/core/src/gpu/layer.rs
@@ -1,5 +1,3 @@
-use num::FromPrimitive;
-
 use super::*;
 
 #[derive(Primitive, Debug, Ord, Eq, PartialOrd, PartialEq, Clone, Copy)]
diff --git a/core/src/gpu/mod.rs b/core/src/gpu/mod.rs
index 078704d..58153d4 100644
--- a/core/src/gpu/mod.rs
+++ b/core/src/gpu/mod.rs
@@ -367,8 +367,8 @@ impl Gpu {
             self.render_scanline();
             // update BG2/3 reference points on the end of a scanline
             for i in 0..2 {
-                self.bg_aff[i].internal_x += self.bg_aff[i].pb as i16 as i32;
-                self.bg_aff[i].internal_y += self.bg_aff[i].pd as i16 as i32;
+                self.bg_aff[i].internal_x += self.bg_aff[i].pb as i32;
+                self.bg_aff[i].internal_y += self.bg_aff[i].pd as i32;
             }
 
             (GpuEvent::HDraw, CYCLES_HDRAW)
diff --git a/core/src/gpu/mosaic.rs b/core/src/gpu/mosaic.rs
index d5b1d92..96ed532 100644
--- a/core/src/gpu/mosaic.rs
+++ b/core/src/gpu/mosaic.rs
@@ -1,5 +1,4 @@
 use super::*;
-use regs::RegMosaic;
 
 impl RegMosaic {
     fn is_enabled_for_bg(&self) -> bool {
diff --git a/core/src/gpu/render/obj.rs b/core/src/gpu/render/obj.rs
index dc09846..4a12f2c 100644
--- a/core/src/gpu/render/obj.rs
+++ b/core/src/gpu/render/obj.rs
@@ -278,7 +278,7 @@ impl Gpu {
     }
 
     fn write_obj_pixel(&mut self, x: usize, y: usize, pixel_color: Rgb15, attrs: &ObjAttrs) {
-        let mut current_obj = self.obj_buffer_get_mut(x, y);
+        let current_obj = self.obj_buffer_get_mut(x, y);
         let obj_mode = attrs.0.objmode();
         match obj_mode {
             ObjMode::Normal | ObjMode::Sfx => {
@@ -315,7 +315,7 @@ pub enum ObjMode {
 
 impl From<u16> for ObjMode {
     fn from(v: u16) -> ObjMode {
-        ObjMode::from_u16(v as u16).unwrap()
+        ObjMode::from_u16(v).unwrap()
     }
 }
 
@@ -329,7 +329,7 @@ enum ObjType {
 
 impl From<u16> for ObjType {
     fn from(v: u16) -> ObjType {
-        ObjType::from_u16(v as u16).unwrap()
+        ObjType::from_u16(v).unwrap()
     }
 }
 
diff --git a/core/src/gpu/render/text.rs b/core/src/gpu/render/text.rs
index a9851f6..a45407c 100644
--- a/core/src/gpu/render/text.rs
+++ b/core/src/gpu/render/text.rs
@@ -37,14 +37,14 @@ impl Gpu {
             (256, 512) => bg_y / 256,
             (512, 512) => index2d!(u32, bg_x / 256, bg_y / 256, 2),
             _ => unreachable!(),
-        } as u32;
+        };
 
         let mut se_row = (bg_x / 8) % 32;
         let se_column = (bg_y / 8) % 32;
 
         // this will be non-zero if the h-scroll lands in a middle of a tile
         let mut start_tile_x = bg_x % 8;
-        let tile_py = (bg_y % 8) as u32;
+        let tile_py = bg_y % 8;
 
         #[allow(unused)]
         macro_rules! render_loop {
@@ -98,8 +98,8 @@ impl Gpu {
         let viewport = ViewPort::new(texture_size, texture_size);
 
         let ref_point = self.get_ref_point(bg);
-        let pa = self.bg_aff[bg - 2].pa as i16 as i32;
-        let pc = self.bg_aff[bg - 2].pc as i16 as i32;
+        let pa = self.bg_aff[bg - 2].pa as i32;
+        let pc = self.bg_aff[bg - 2].pc as i32;
 
         let screen_block = self.bgcnt[bg].screen_block();
         let char_block = self.bgcnt[bg].char_block();
diff --git a/core/src/iodev.rs b/core/src/iodev.rs
index 56e5e21..7395df1 100644
--- a/core/src/iodev.rs
+++ b/core/src/iodev.rs
@@ -3,8 +3,6 @@ use std::cmp;
 use arm7tdmi::memory::{Addr, BusIO, DebugRead};
 
 use super::dma::DmaController;
-use super::gpu::regs::GpuMemoryMappedIO;
-use super::gpu::regs::WindowFlags;
 use super::gpu::*;
 use super::interrupt::{InterruptConnect, InterruptController, SharedInterruptFlags};
 use super::keypad;
@@ -109,22 +107,22 @@ impl BusIO for IoDevices {
             REG_BG1CNT => io.gpu.bgcnt[1].read(),
             REG_BG2CNT => io.gpu.bgcnt[2].read(),
             REG_BG3CNT => io.gpu.bgcnt[3].read(),
-            REG_WIN0H => ((io.gpu.win0.left as u16) << 8 | (io.gpu.win0.right as u16)),
-            REG_WIN1H => ((io.gpu.win1.left as u16) << 8 | (io.gpu.win1.right as u16)),
-            REG_WIN0V => ((io.gpu.win0.top as u16) << 8 | (io.gpu.win0.bottom as u16)),
-            REG_WIN1V => ((io.gpu.win1.top as u16) << 8 | (io.gpu.win1.bottom as u16)),
+            REG_WIN0H => (io.gpu.win0.left as u16) << 8 | (io.gpu.win0.right as u16),
+            REG_WIN1H => (io.gpu.win1.left as u16) << 8 | (io.gpu.win1.right as u16),
+            REG_WIN0V => (io.gpu.win0.top as u16) << 8 | (io.gpu.win0.bottom as u16),
+            REG_WIN1V => (io.gpu.win1.top as u16) << 8 | (io.gpu.win1.bottom as u16),
             REG_WININ => {
-                ((io.gpu.win1.flags.bits() as u16) << 8) | (io.gpu.win0.flags.bits() as u16)
+                (io.gpu.win1.flags.bits() << 8) | io.gpu.win0.flags.bits()
             }
             REG_WINOUT => {
-                ((io.gpu.winobj_flags.bits() as u16) << 8) | (io.gpu.winout_flags.bits() as u16)
+                (io.gpu.winobj_flags.bits() << 8) | io.gpu.winout_flags.bits()
             }
             REG_BLDCNT => io.gpu.bldcnt.read(),
             REG_BLDALPHA => io.gpu.bldalpha.read(),
 
             REG_IME => io.intc.interrupt_master_enable as u16,
-            REG_IE => io.intc.interrupt_enable.0 as u16,
-            REG_IF => io.intc.interrupt_flags.get().value() as u16,
+            REG_IE => io.intc.interrupt_enable.0,
+            REG_IF => io.intc.interrupt_flags.get().value(),
 
             REG_TM0CNT_L..=REG_TM3CNT_H => io.timers.handle_read(io_addr, &io.scheduler),
 
@@ -170,7 +168,7 @@ impl BusIO for IoDevices {
     }
 
     fn write_16(&mut self, addr: Addr, value: u16) {
-        let mut io = self;
+        let io = self;
         // if addr > 0x0800 {
         //     return;
         // }
@@ -310,11 +308,11 @@ impl BusIO for IoDevices {
     fn write_8(&mut self, addr: Addr, value: u8) {
         match addr + IO_BASE {
             /* FIFO_A */
-            0x0400_00A0 | 0x0400_00A1 | 0x0400_00A2 | 0x0400_00A3 => {
+            0x0400_00A0..=0x0400_00A3 => {
                 self.sound.write_fifo(0, value as i8)
             }
             /* FIFO_B */
-            0x0400_00A4 | 0x0400_00A5 | 0x0400_00A6 | 0x0400_00A7 => {
+            0x0400_00A4..=0x0400_00A7 => {
                 self.sound.write_fifo(1, value as i8)
             }
             _ => {
@@ -588,5 +586,5 @@ pub fn io_reg_string(addr: u32) -> &'static str {
 
 fn sign_extend_i32(value: i32, size: u32) -> i32 {
     let shift = 32 - size;
-    ((value << shift) as i32) >> shift
+    (value << shift) >> shift
 }
diff --git a/core/src/keypad.rs b/core/src/keypad.rs
index c80fb91..437119f 100644
--- a/core/src/keypad.rs
+++ b/core/src/keypad.rs
@@ -23,9 +23,9 @@ pub enum KeyState {
     Released = 1,
 }
 
-impl Into<bool> for KeyState {
-    fn into(self) -> bool {
-        match self {
+impl From<KeyState> for bool {
+    fn from(val: KeyState) -> Self {
+        match val {
             KeyState::Pressed => false,
             KeyState::Released => true,
         }
diff --git a/core/src/mgba_debug.rs b/core/src/mgba_debug.rs
index a5a8972..f10b444 100644
--- a/core/src/mgba_debug.rs
+++ b/core/src/mgba_debug.rs
@@ -16,6 +16,12 @@ pub struct DebugPort {
     debug_string: Box<[u8]>,
 }
 
+impl Default for DebugPort {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl DebugPort {
     pub fn new() -> DebugPort {
         DebugPort {
diff --git a/core/src/sched.rs b/core/src/sched.rs
index 0f734fa..8566314 100644
--- a/core/src/sched.rs
+++ b/core/src/sched.rs
@@ -67,7 +67,7 @@ impl Ord for Event {
 impl PartialOrd for Event {
     #[inline]
     fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
-        other.time.partial_cmp(&self.time)
+        Some(self.cmp(other))
     }
 
     #[inline]
@@ -108,6 +108,12 @@ pub struct Scheduler {
 
 pub type SharedScheduler = Shared<Scheduler>;
 
+impl Default for Scheduler {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl Scheduler {
     pub fn new() -> Scheduler {
         Scheduler {
diff --git a/core/src/sound/interface.rs b/core/src/sound/interface.rs
index ad6bb0f..b386e77 100644
--- a/core/src/sound/interface.rs
+++ b/core/src/sound/interface.rs
@@ -58,6 +58,6 @@ impl AudioInterface for NullAudio {}
 
 impl NullAudio {
     pub fn new() -> Box<NullAudio> {
-        Box::new(NullAudio::default())
+        Box::<NullAudio>::default()
     }
 }
diff --git a/core/src/sysbus.rs b/core/src/sysbus.rs
index 34a3540..987242c 100644
--- a/core/src/sysbus.rs
+++ b/core/src/sysbus.rs
@@ -8,7 +8,7 @@ use super::cartridge::Cartridge;
 use super::dma::DmaNotifer;
 use super::iodev::{IoDevices, WaitControl};
 use super::sched::*;
-use arm7tdmi::{self, Arm7tdmiCore};
+use arm7tdmi::{Arm7tdmiCore};
 use rustboyadvance_utils::{Shared, WeakPointer};
 
 pub mod consts {
diff --git a/platform/rustboyadvance-sdl2/src/main.rs b/platform/rustboyadvance-sdl2/src/main.rs
index 69ad196..806dbd2 100644
--- a/platform/rustboyadvance-sdl2/src/main.rs
+++ b/platform/rustboyadvance-sdl2/src/main.rs
@@ -1,7 +1,6 @@
 use sdl2::controller::Button;
 use sdl2::event::Event;
 use sdl2::keyboard::Scancode;
-use sdl2::{self};
 
 use structopt::StructOpt;