diff --git a/src/BizHawk.Emulation.Cores/Computers/AmstradCPC/Media/Tape/CDT/CdtConverter.cs b/src/BizHawk.Emulation.Cores/Computers/AmstradCPC/Media/Tape/CDT/CdtConverter.cs
index 97b7e27af4..614a0578a3 100644
--- a/src/BizHawk.Emulation.Cores/Computers/AmstradCPC/Media/Tape/CDT/CdtConverter.cs
+++ b/src/BizHawk.Emulation.Cores/Computers/AmstradCPC/Media/Tape/CDT/CdtConverter.cs
@@ -1614,9 +1614,9 @@ namespace BizHawk.Emulation.Cores.Computers.AmstradCPC
 
 			_position++;
 
-			int blockLen = data[_position] |
-				data[_position + 1] << 8 |
-				data[_position + 2] << 16;
+			var blockLen = data[_position]
+				| (data[_position + 1] << 8)
+				| (data[_position + 2] << 16);
 			_position += 3;
 
 			// add to tape
diff --git a/src/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Media/Tape/TZX/TzxConverter.cs b/src/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Media/Tape/TZX/TzxConverter.cs
index 192cf165d2..1957bf3617 100644
--- a/src/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Media/Tape/TZX/TzxConverter.cs
+++ b/src/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Media/Tape/TZX/TzxConverter.cs
@@ -1960,9 +1960,9 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
 
 			_position++;
 
-			int blockLen = data[_position] |
-				data[_position + 1] << 8 |
-				data[_position + 2] << 16;
+			var blockLen = data[_position]
+				| (data[_position + 1] << 8)
+				| (data[_position + 2] << 16);
 			_position += 3;
 
 			// add to tape
diff --git a/src/BizHawk.Emulation.Cores/Consoles/Magnavox/Odyssey2/MemoryMap.cs b/src/BizHawk.Emulation.Cores/Consoles/Magnavox/Odyssey2/MemoryMap.cs
index 031cdf0d16..8ff3870f66 100644
--- a/src/BizHawk.Emulation.Cores/Consoles/Magnavox/Odyssey2/MemoryMap.cs
+++ b/src/BizHawk.Emulation.Cores/Consoles/Magnavox/Odyssey2/MemoryMap.cs
@@ -113,14 +113,14 @@ namespace BizHawk.Emulation.Cores.Consoles.O2Hawk
 			if (port == 1)
 			{
 				// various control pins
-				return (byte)((ppu.lum_en ? 0x80 : 0) |
-				(copy_en ? 0x40 : 0) |
-				(!vpp_en ? 0x20 : 0) |
-				(!RAM_en ? 0x10 : 0) |
-				(!ppu_en ? 0x08 : 0) |
-				(!kybrd_en ? 0x04 : 0) |
-				(cart_b1 ? 0x02 : 0) |
-				(cart_b0 ? 0x01 : 0));
+				return unchecked((byte) ((ppu.lum_en ? 0x80 : 0)
+					| (copy_en ? 0x40 : 0)
+					| (!vpp_en ? 0x20 : 0)
+					| (!RAM_en ? 0x10 : 0)
+					| (!ppu_en ? 0x08 : 0)
+					| (!kybrd_en ? 0x04 : 0)
+					| (cart_b1 ? 0x02 : 0)
+					| (cart_b0 ? 0x01 : 0)));
 			}
 
 			// keyboard
diff --git a/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_UNL-KOF97.cs b/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_UNL-KOF97.cs
index a259b83e08..21660be789 100644
--- a/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_UNL-KOF97.cs
+++ b/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_UNL-KOF97.cs
@@ -18,16 +18,11 @@
 		}
 
 		private byte Unscramble(byte data)
-		{
-			return (byte)
-			(
-				(data >> 1 & 0x01) |
-				(data >> 4 & 0x02) |
-				(data << 2 & 0x04) |
-				(data >> 0 & 0xD8) |
-				(data << 3 & 0x20)
-			);
-		}
+			=> unchecked((byte) (((data >> 1) & 0x01)
+				| ((data >> 4) & 0x02)
+				| ((data << 2) & 0x04)
+				| (data & 0xD8)
+				| ((data << 3) & 0x20)));
 
 		public override void WritePrg(int addr, byte value)
 		{