diff --git a/src/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GBC_GB_PPU.cs b/src/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GBC_GB_PPU.cs
index eee91cc4e0..1ab1f1e283 100644
--- a/src/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GBC_GB_PPU.cs
+++ b/src/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GBC_GB_PPU.cs
@@ -162,8 +162,9 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
 					scroll_x = value;
 					break; 
 				case 0xFF44: // LY
-					LY = 0; /*reset*/
-					LY_read = 0;
+					// writing to LY has no effect on GBC (zen intergalactic ninja does this on initialization)
+					//LY = 0; /*reset*/
+					//LY_read = 0;
 					break;
 				case 0xFF45:  // LYC
 					// tests indicate that latching writes to LYC should take place 4 cycles after the write
diff --git a/src/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GBC_PPU.cs b/src/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GBC_PPU.cs
index 2b94918079..b97a6a613d 100644
--- a/src/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GBC_PPU.cs
+++ b/src/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GBC_PPU.cs
@@ -158,8 +158,9 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
 					scroll_x = value;
 					break; 
 				case 0xFF44: // LY
-					LY = 0; /*reset*/
-					LY_read = 0;
+					// writing to LY has no effect on GBC (zen intergalactic ninja does this on initialization)
+					//LY = 0; /*reset*/
+					//LY_read = 0;
 					break;
 				case 0xFF45:  // LYC
 					// tests indicate that latching writes to LYC should take place 4 cycles after the write
diff --git a/src/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GB_PPU.cs b/src/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GB_PPU.cs
index ef144ac24e..ba60ecde7a 100644
--- a/src/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GB_PPU.cs
+++ b/src/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GB_PPU.cs
@@ -83,6 +83,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
 					scroll_x = value;
 					break;
 				case 0xFF44: // LY
+					// writing to LY has no effect on GBC, not sure about GB (zen intergalactic ninja does this on initialization)
 					LY = 0; /*reset*/
 					break;
 				case 0xFF45:  // LYC