diff --git a/BizHawk.Emulation/Consoles/PC Engine/MemoryMap.Populous.cs b/BizHawk.Emulation/Consoles/PC Engine/MemoryMap.Populous.cs
index 0ff28711af..4dc2cf441e 100644
--- a/BizHawk.Emulation/Consoles/PC Engine/MemoryMap.Populous.cs	
+++ b/BizHawk.Emulation/Consoles/PC Engine/MemoryMap.Populous.cs	
@@ -27,7 +27,7 @@
                 if (addr >= 0x1FF000 &&
                     addr < 0x1FF400)         { IOBuffer = ReadInput(); return IOBuffer; }
                 if ((addr & ~1) == 0x1FF400) return IOBuffer;
-                if (addr == 0x1FF402)        { IOBuffer = (byte)(Cpu.IRQControlByte | (IOBuffer & 0xF8)); return IOBuffer; }
+                if (addr == 0x1FF402)        { IOBuffer = Cpu.IRQControlByte; return IOBuffer; }
                 if (addr == 0x1FF403)        { IOBuffer = (byte)(Cpu.ReadIrqStatus() | (IOBuffer & 0xF8)); return IOBuffer; }
             }
 
diff --git a/BizHawk.Emulation/Consoles/PC Engine/MemoryMap.SF2.cs b/BizHawk.Emulation/Consoles/PC Engine/MemoryMap.SF2.cs
index 20e4ad7f97..36d18e6220 100644
--- a/BizHawk.Emulation/Consoles/PC Engine/MemoryMap.SF2.cs	
+++ b/BizHawk.Emulation/Consoles/PC Engine/MemoryMap.SF2.cs	
@@ -27,7 +27,7 @@
                 if (addr >= 0x1FF000 && 
                     addr <  0x1FF400)          { IOBuffer = ReadInput(); return IOBuffer; }
                 if ((addr & ~1) == 0x1FF400)   return IOBuffer;
-                if (addr == 0x1FF402)          { IOBuffer = (byte) (Cpu.IRQControlByte  | (IOBuffer & 0xF8)); return IOBuffer; }
+                if (addr == 0x1FF402)          { IOBuffer = Cpu.IRQControlByte; return IOBuffer; }
                 if (addr == 0x1FF403)          { IOBuffer = (byte) (Cpu.ReadIrqStatus() | (IOBuffer & 0xF8)); return IOBuffer; }
             }
 
diff --git a/BizHawk.Emulation/Consoles/PC Engine/MemoryMap.SuperGrafx.cs b/BizHawk.Emulation/Consoles/PC Engine/MemoryMap.SuperGrafx.cs
index ef56d7a0be..389e6f1fe0 100644
--- a/BizHawk.Emulation/Consoles/PC Engine/MemoryMap.SuperGrafx.cs	
+++ b/BizHawk.Emulation/Consoles/PC Engine/MemoryMap.SuperGrafx.cs	
@@ -30,7 +30,7 @@
                 if (addr >= 0x1FF000 &&
                     addr < 0x1FF400)         { IOBuffer = ReadInput(); return IOBuffer; }
                 if ((addr & ~1) == 0x1FF400) return IOBuffer;
-                if (addr == 0x1FF402)        { IOBuffer = (byte)(Cpu.IRQControlByte | (IOBuffer & 0xF8)); return IOBuffer; }
+                if (addr == 0x1FF402)        { IOBuffer = Cpu.IRQControlByte; return IOBuffer; }
                 if (addr == 0x1FF403)        { IOBuffer = (byte)(Cpu.ReadIrqStatus() | (IOBuffer & 0xF8)); return IOBuffer; }
             }
 
diff --git a/BizHawk.Emulation/Consoles/PC Engine/MemoryMap.TurboCD.cs b/BizHawk.Emulation/Consoles/PC Engine/MemoryMap.TurboCD.cs
index 4c9261e5fb..f4fe1d3c2e 100644
--- a/BizHawk.Emulation/Consoles/PC Engine/MemoryMap.TurboCD.cs	
+++ b/BizHawk.Emulation/Consoles/PC Engine/MemoryMap.TurboCD.cs	
@@ -25,7 +25,7 @@
                 if (addr >= 0x1FF000 &&
                     addr < 0x1FF400) { IOBuffer = ReadInput(); return IOBuffer; }
                 if ((addr & ~1) == 0x1FF400) return IOBuffer;
-                if (addr == 0x1FF402) { IOBuffer = (byte)(Cpu.IRQControlByte | (IOBuffer & 0xF8)); return IOBuffer; }
+                if (addr == 0x1FF402) { IOBuffer = Cpu.IRQControlByte; return IOBuffer; }
                 if (addr == 0x1FF403) { IOBuffer = (byte)(Cpu.ReadIrqStatus() | (IOBuffer & 0xF8)); return IOBuffer; }
                 if (addr >= 0x1FF800) return ReadCD(addr);
             }
diff --git a/BizHawk.Emulation/Consoles/PC Engine/MemoryMap.cs b/BizHawk.Emulation/Consoles/PC Engine/MemoryMap.cs
index a1b44fc3e5..ca3a2163a1 100644
--- a/BizHawk.Emulation/Consoles/PC Engine/MemoryMap.cs	
+++ b/BizHawk.Emulation/Consoles/PC Engine/MemoryMap.cs	
@@ -21,7 +21,7 @@
                 if (addr >= 0x1FF000 && 
                     addr <  0x1FF400)          { IOBuffer = ReadInput(); return IOBuffer; }
                 if ((addr & ~1) == 0x1FF400)   return IOBuffer;
-                if (addr == 0x1FF402)          { IOBuffer = (byte) (Cpu.IRQControlByte  | (IOBuffer & 0xF8)); return IOBuffer; }
+                if (addr == 0x1FF402)          { IOBuffer = Cpu.IRQControlByte; return IOBuffer; }
                 if (addr == 0x1FF403)          { IOBuffer = (byte) (Cpu.ReadIrqStatus() | (IOBuffer & 0xF8)); return IOBuffer; }
                 if (addr >= 0x1FF800)          return ReadCD(addr);
             }
diff --git a/BizHawk.MultiClient/output/gamedb_pce_cd.txt b/BizHawk.MultiClient/output/gamedb_pce_cd.txt
index dcef93c390..9444ddeb25 100644
--- a/BizHawk.MultiClient/output/gamedb_pce_cd.txt
+++ b/BizHawk.MultiClient/output/gamedb_pce_cd.txt
@@ -100,6 +100,7 @@ E6CB40FD1E315B84D09100915DCABF9C		Shadow of the Beast (U)	PCE		NeedSuperSysCard;
 C8559632FE3EA3B4FBABBEF80865B36C		Shape Shifter (U)	PCE		NeedSuperSysCard
 B2FEE487FBE1CB5A81F1FAAA5C49AF0A		Sim Earth	PCE		NeedSuperSysCard
 C0DD9A7A52ACF8D98F0BA36F907C486A		Snatcher	PCE		NeedSuperSysCard
+09DE842E19F5661C6EC6071D5615F5E3		Space Fantasy Zone (Proto)	PCE		NeedSuperSysCard
 8E352778CD8A5530761DFD4127D1BBE2		Splash Lake (U)	PCE
 25607EDD1F77B2C993185A8C2DBD785E		Spriggan	PCE
 506B41BDEEB6EA6BD4AFA89C9C594BEE		Spriggan Mark II	PCE		NeedSuperSysCard
diff --git a/BizHawk.MultiClient/output/gamedb_pce_hucards.txt b/BizHawk.MultiClient/output/gamedb_pce_hucards.txt
index f766bf4ef5..735ba0220d 100644
--- a/BizHawk.MultiClient/output/gamedb_pce_hucards.txt
+++ b/BizHawk.MultiClient/output/gamedb_pce_hucards.txt
@@ -24,11 +24,11 @@ CC44F8DCE3263CEEB21AA8AF2146E283	V	Aero Blasters (J) [b2]	PCE
 CA88D88B45F4947246C9A087B1CCF072		Aero Blasters (U) [h1]	PCE
 B2B62BAAB5FEFAFC5DB6538720B503C3		Aero Blasters (U)	PCE
 6667104925D48EDF16286CF0251B8105		Aero Blasters Sounds	PCE
-4B8C2FDEB120050AC6EF87FCAF4F04BF	V	After Burner II (J) [b1]	PCE
-38CC562CA8AD52EA5D5979A4D7D4838F	V	After Burner II (J) [b2]	PCE
-110AD6C444CD0A4E19BDA5762E787639	V	After Burner II (J) [b3]	PCE
-E6007D05D1E7EF57787110451496EECF	V	After Burner II (J) [b4]	PCE
-AC0CDEE014E725E428FDE5774751FF8D		After Burner II (J)	PCE
+4B8C2FDEB120050AC6EF87FCAF4F04BF	V	After Burner II (J) [b1]	PCE		HBlankPeriod=87
+38CC562CA8AD52EA5D5979A4D7D4838F	V	After Burner II (J) [b2]	PCE		HBlankPeriod=87
+110AD6C444CD0A4E19BDA5762E787639	V	After Burner II (J) [b3]	PCE		HBlankPeriod=87
+E6007D05D1E7EF57787110451496EECF	V	After Burner II (J) [b4]	PCE		HBlankPeriod=87
+AC0CDEE014E725E428FDE5774751FF8D		After Burner II (J)	PCE		HBlankPeriod=87
 AA4DF7A6167F0E92A7934B829B2D32F1		After Burner II Sounds	PCE
 CAA17E131DDD5AD01799BEB161C3216D		Air Zonk (U) [h1]	PCE		ForceSpriteLimit
 406BEC60FFCA9AC151A793969B0C10C6		Air Zonk (U)	PCE		ForceSpriteLimit