diff --git a/src/common/host_memory.cpp b/src/common/host_memory.cpp
index de000d32e5..99070f02b2 100644
--- a/src/common/host_memory.cpp
+++ b/src/common/host_memory.cpp
@@ -451,16 +451,14 @@ static void* ChooseVirtualBase(size_t virtual_size) {
 
 #else
 
-static void* ChooseVirtualBase(size_t virtual_size) {
-#if defined(__OPENORBIS__)
-    return mmap(nullptr, virtual_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_SYSTEM, -1, 0);
-#elif defined(__FreeBSD__) || defined(__DragonFly__) || defined(__OpenBSD__) || defined(__sun__) || defined(__HAIKU__) || defined(__managarm__) || defined(__AIX__)
-    void* virtual_base = mmap(nullptr, virtual_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE | MAP_ALIGNED_SUPER, -1, 0);
+static void* ChooseVirtualBase(size_t size) {
+#if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__OpenBSD__) || defined(__sun__) || defined(__HAIKU__) || defined(__managarm__) || defined(__AIX__)
+    void* virtual_base = mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE | MAP_ALIGNED_SUPER, -1, 0);
     if (virtual_base != MAP_FAILED)
         return virtual_base;
-    return mmap(nullptr, virtual_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, -1, 0);
+    return mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, -1, 0);
 #else
-    return mmap(nullptr, virtual_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, -1, 0);
+    return mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, -1, 0);
 #endif
 }
 
@@ -713,6 +711,12 @@ private:
 #endif // ^^^ POSIX ^^^
 
 HostMemory::HostMemory(size_t backing_size_, size_t virtual_size_) : backing_size(backing_size_), virtual_size(virtual_size_) {
+#ifdef __OPENORBIS__
+    LOG_WARNING(HW_Memory, "Platform doesn't support fastmem");
+    fallback_buffer = std::make_unique<Common::VirtualBuffer<u8>>(backing_size);
+    backing_base = fallback_buffer->data();
+    virtual_base = nullptr;
+#else
     // Try to allocate a fastmem arena.
     // The implementation will fail with std::bad_alloc on errors.
     impl = std::make_unique<HostMemory::Impl>(AlignUp(backing_size, PageAlignment), AlignUp(virtual_size, PageAlignment) + HugePageSize);
@@ -723,6 +727,7 @@ HostMemory::HostMemory(size_t backing_size_, size_t virtual_size_) : backing_siz
         virtual_base = reinterpret_cast<u8*>(Common::AlignUp(uintptr_t(virtual_base), HugePageSize));
         virtual_base_offset = virtual_base - impl->virtual_base;
     }
+#endif
 }
 
 HostMemory::~HostMemory() = default;
diff --git a/src/common/virtual_buffer.cpp b/src/common/virtual_buffer.cpp
index 55ddfc243a..ef9113c557 100644
--- a/src/common/virtual_buffer.cpp
+++ b/src/common/virtual_buffer.cpp
@@ -6,6 +6,8 @@
 
 #ifdef _WIN32
 #include <windows.h>
+#elif defined(__OPENORBIS__)
+#include <orbis/libkernel.h>
 #else
 #include <sys/mman.h>
 #endif
@@ -17,23 +19,38 @@ namespace Common {
 
 void* AllocateMemoryPages(std::size_t size) noexcept {
 #ifdef _WIN32
-    void* base = VirtualAlloc(nullptr, size, MEM_COMMIT, PAGE_READWRITE);
+    void* addr = VirtualAlloc(nullptr, size, MEM_COMMIT, PAGE_READWRITE);
+    ASSERT(addr != nullptr);
+#elif defined(__OPENORBIS__)
+    u64 align = 16384;
+    void *addr = nullptr;
+    off_t direct_mem_off;
+    int32_t rc;
+    if ((rc = sceKernelAllocateDirectMemory(0, sceKernelGetDirectMemorySize(), size, align, 3, &direct_mem_off)) < 0) {
+        ASSERT(false && "sceKernelAllocateDirectMemory");
+        return nullptr;
+    }
+    if ((rc = sceKernelMapDirectMemory(&addr, size, 0x33, 0, direct_mem_off, align)) < 0) {
+        ASSERT(false && "sceKernelMapDirectMemory");
+        return nullptr;
+    }
+    ASSERT(addr != nullptr);
 #else
-    void* base = mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
-    if (base == MAP_FAILED)
-        base = nullptr;
+    void* addr = mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
+    ASSERT(addr != MAP_FAILED);
 #endif
-    ASSERT(base);
-    return base;
+    return addr;
 }
 
-void FreeMemoryPages(void* base, [[maybe_unused]] std::size_t size) noexcept {
-    if (!base)
+void FreeMemoryPages(void* addr, [[maybe_unused]] std::size_t size) noexcept {
+    if (!addr)
         return;
 #ifdef _WIN32
-    ASSERT(VirtualFree(base, 0, MEM_RELEASE));
+    VirtualFree(addr, 0, MEM_RELEASE)
+#elif defined(__OPENORBIS__)
 #else
-    ASSERT(munmap(base, size) == 0);
+    int rc = munmap(addr, size);
+    ASSERT(rc == 0);
 #endif
 }