diff --git a/src/Ryujinx.HLE/HOS/Kernel/KernelStatic.cs b/src/Ryujinx.HLE/HOS/Kernel/KernelStatic.cs
index e05fc8397..e3c5865ae 100644
--- a/src/Ryujinx.HLE/HOS/Kernel/KernelStatic.cs
+++ b/src/Ryujinx.HLE/HOS/Kernel/KernelStatic.cs
@@ -29,6 +29,7 @@ namespace Ryujinx.HLE.HOS.Kernel
                 capabilities,
                 context.ResourceLimit,
                 MemoryRegion.Service,
+                context.Device.Configuration.MemoryConfiguration,
                 null,
                 customThreadStart);
 
diff --git a/src/Ryujinx.HLE/HOS/Kernel/Memory/KPageTableBase.cs b/src/Ryujinx.HLE/HOS/Kernel/Memory/KPageTableBase.cs
index ee1b4a7be..bc59b0b4d 100644
--- a/src/Ryujinx.HLE/HOS/Kernel/Memory/KPageTableBase.cs
+++ b/src/Ryujinx.HLE/HOS/Kernel/Memory/KPageTableBase.cs
@@ -102,6 +102,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
             ProcessCreationFlags flags,
             bool fromBack,
             MemoryRegion memRegion,
+            MemoryConfiguration memConfig,
             ulong address,
             ulong size,
             KMemoryBlockSlabManager slabManager)
@@ -117,6 +118,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
                 addrSpaceBase,
                 addrSpaceSize,
                 memRegion,
+                memConfig,
                 address,
                 size,
                 slabManager);
@@ -159,6 +161,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
             ulong addrSpaceStart,
             ulong addrSpaceEnd,
             MemoryRegion memRegion,
+            MemoryConfiguration memConfig,
             ulong address,
             ulong size,
             KMemoryBlockSlabManager slabManager)
@@ -193,7 +196,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
 
                 case ProcessCreationFlags.AddressSpace64BitDeprecated:
                     aliasRegion.Size = 0x180000000;
-                    heapRegion.Size = 0x180000000;
+                    heapRegion.Size = memConfig == MemoryConfiguration.MemoryConfiguration12GiB ? 0x300000000u : 0x180000000u;
                     stackRegion.Size = 0;
                     tlsIoRegion.Size = 0;
                     CodeRegionStart = 0x8000000;
@@ -223,7 +226,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
                         int addressSpaceWidth = (int)ulong.Log2(_reservedAddressSpaceSize);
 
                         aliasRegion.Size = 1UL << (addressSpaceWidth - 3);
-                        heapRegion.Size = 0x180000000;
+                        heapRegion.Size = memConfig == MemoryConfiguration.MemoryConfiguration12GiB ? 0x300000000u : 0x180000000u;
                         stackRegion.Size = 1UL << (addressSpaceWidth - 8);
                         tlsIoRegion.Size = 1UL << (addressSpaceWidth - 3);
                         CodeRegionStart = BitUtils.AlignDown(address, RegionAlignment);
@@ -237,7 +240,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
                     else
                     {
                         aliasRegion.Size = 0x1000000000;
-                        heapRegion.Size = 0x180000000;
+                        heapRegion.Size = memConfig == MemoryConfiguration.MemoryConfiguration12GiB ? 0x300000000u : 0x180000000u;
                         stackRegion.Size = 0x80000000;
                         tlsIoRegion.Size = 0x1000000000;
                         CodeRegionStart = BitUtils.AlignDown(address, RegionAlignment);
diff --git a/src/Ryujinx.HLE/HOS/Kernel/Process/KProcess.cs b/src/Ryujinx.HLE/HOS/Kernel/Process/KProcess.cs
index bea1f0ef3..b823d14f7 100644
--- a/src/Ryujinx.HLE/HOS/Kernel/Process/KProcess.cs
+++ b/src/Ryujinx.HLE/HOS/Kernel/Process/KProcess.cs
@@ -124,6 +124,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
             KPageList pageList,
             KResourceLimit resourceLimit,
             MemoryRegion memRegion,
+            MemoryConfiguration memConfig,
             IProcessContextFactory contextFactory,
             ThreadStart customThreadStart = null)
         {
@@ -153,6 +154,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
                 creationInfo.Flags,
                 !creationInfo.Flags.HasFlag(ProcessCreationFlags.EnableAslr),
                 memRegion,
+                memConfig,
                 codeAddress,
                 codeSize,
                 slabManager);
@@ -189,6 +191,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
             ReadOnlySpan<uint> capabilities,
             KResourceLimit resourceLimit,
             MemoryRegion memRegion,
+            MemoryConfiguration memConfig,
             IProcessContextFactory contextFactory,
             ThreadStart customThreadStart = null)
         {
@@ -252,6 +255,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
                 creationInfo.Flags,
                 !creationInfo.Flags.HasFlag(ProcessCreationFlags.EnableAslr),
                 memRegion,
+                memConfig,
                 codeAddress,
                 codeSize,
                 slabManager);
diff --git a/src/Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall.cs b/src/Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall.cs
index 005ac1452..260ff8af3 100644
--- a/src/Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall.cs
+++ b/src/Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall.cs
@@ -137,6 +137,7 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
                 capabilities,
                 resourceLimit,
                 memRegion,
+                _context.Device.Configuration.MemoryConfiguration,
                 contextFactory,
                 customThreadStart);
 
@@ -888,7 +889,7 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
         [Svc(1)]
         public Result SetHeapSize([PointerSized] out ulong address, [PointerSized] ulong size)
         {
-            if ((size & 0xfffffffe001fffff) != 0)
+            if ((size & 0xfffffffd001fffff) != 0)
             {
                 address = 0;
 
diff --git a/src/Ryujinx.HLE/Loaders/Processes/ProcessLoaderHelper.cs b/src/Ryujinx.HLE/Loaders/Processes/ProcessLoaderHelper.cs
index 5729052e8..7f0c6b3f5 100644
--- a/src/Ryujinx.HLE/Loaders/Processes/ProcessLoaderHelper.cs
+++ b/src/Ryujinx.HLE/Loaders/Processes/ProcessLoaderHelper.cs
@@ -189,7 +189,7 @@ namespace Ryujinx.HLE.Loaders.Processes
                 codeAddress,
                 codeSize);
 
-            result = process.InitializeKip(creationInfo, kip.Capabilities, pageList, context.ResourceLimit, memoryRegion, processContextFactory);
+            result = process.InitializeKip(creationInfo, kip.Capabilities, pageList, context.ResourceLimit, memoryRegion, context.Device.Configuration.MemoryConfiguration, processContextFactory);
             if (result != Result.Success)
             {
                 Logger.Error?.Print(LogClass.Loader, $"Process initialization returned error \"{result}\".");
@@ -389,6 +389,7 @@ namespace Ryujinx.HLE.Loaders.Processes
                 MemoryMarshal.Cast<byte, uint>(npdm.KernelCapabilityData),
                 resourceLimit,
                 memoryRegion,
+                context.Device.Configuration.MemoryConfiguration,
                 processContextFactory);
 
             if (result != Result.Success)