Update README with project details and usage instructions

README.md

@@ -13,16 +13,6 @@ SPDX-License-Identifier: GPL-2.0-or-later
   An experimental PlayStation 5 emulator for Windows, Linux and macOS.  
 </p>
 
-<p align="center">
-  <a href="https://discord.gg/6GejPEDqpc">
-    <img src="https://img.shields.io/badge/Discord-Join%20our%20Community-5865F2?style=for-the-badge&logo=discord&logoColor=white" alt="Join our Discord">
-  </a>
-</p>
-
-<p align="center">
-  <strong>Join our Discord for development updates, compatibility discussions, support, and community chat.</strong>
-</p>
-
 ---
 
 <p align="center">

src/SharpEmu.Core/Cpu/Native/DirectExecutionBackend.Imports.cs

@@ -1449,6 +1449,9 @@ public sealed partial class DirectExecutionBackend
 		var expectedSemaphoreTrywaitAgain =
 			string.Equals(nid, "H2a+IN9TP0E", StringComparison.Ordinal) &&
 			result == OrbisGen2Result.ORBIS_GEN2_ERROR_TRY_AGAIN;
+		var expectedPollSemaBusy =
+			string.Equals(nid, "12wOHk8ywb0", StringComparison.Ordinal) &&
+			result == OrbisGen2Result.ORBIS_GEN2_ERROR_BUSY;
 		var expectedNetAcceptWouldBlock =
 			string.Equals(nid, "PIWqhn9oSxc", StringComparison.Ordinal) &&
 			resultValue == unchecked((int)0x80410123);
@@ -1463,6 +1466,7 @@ public sealed partial class DirectExecutionBackend
 			!expectedEqueueTimeout &&
 			!expectedMutexTrylockBusy &&
 			!expectedSemaphoreTrywaitAgain &&
+			!expectedPollSemaBusy &&
 			!expectedNetAcceptWouldBlock &&
 			!expectedUserServiceNoEvent &&
 			!expectedPrivacyInvalidParameter)

src/SharpEmu.Libs/VideoOut/VulkanVideoPresenter.cs

@@ -9445,7 +9445,8 @@ internal static unsafe class VulkanVideoPresenter
                 size,
                 BufferUsageFlags.StorageBufferBit,
                 MemoryPropertyFlags.HostVisibleBit | MemoryPropertyFlags.HostCoherentBit,
-                out var memory);
+                out var memory,
+                preferredMemoryFlags: MemoryPropertyFlags.HostCachedBit);
             void* mapped;
             Check(_vk.MapMemory(_device, memory, 0, size, 0, &mapped), "vkMapMemory(guest buffer)");
             var shadow = new byte[checked((int)size)];
@@ -10254,7 +10255,8 @@ internal static unsafe class VulkanVideoPresenter
             ulong size,
             BufferUsageFlags usage,
             MemoryPropertyFlags memoryFlags,
-            out DeviceMemory memory)
+            out DeviceMemory memory,
+            MemoryPropertyFlags preferredMemoryFlags = 0)
         {
             var bufferInfo = new BufferCreateInfo
             {
@@ -10270,7 +10272,10 @@ internal static unsafe class VulkanVideoPresenter
             {
                 SType = StructureType.MemoryAllocateInfo,
                 AllocationSize = requirements.Size,
-                MemoryTypeIndex = FindMemoryType(requirements.MemoryTypeBits, memoryFlags),
+                MemoryTypeIndex = FindMemoryType(
+                    requirements.MemoryTypeBits,
+                    memoryFlags,
+                    preferredMemoryFlags),
             };
             Check(_vk.AllocateMemory(_device, &memoryInfo, null, out memory), "vkAllocateMemory");
             Check(_vk.BindBufferMemory(_device, buffer, memory, 0), "vkBindBufferMemory");
@@ -10307,18 +10312,26 @@ internal static unsafe class VulkanVideoPresenter
             }
         }
 
-        private uint FindMemoryType(uint typeBits, MemoryPropertyFlags requiredFlags)
+        private uint FindMemoryType(
+            uint typeBits,
+            MemoryPropertyFlags requiredFlags,
+            MemoryPropertyFlags preferredFlags = 0)
         {
             _vk.GetPhysicalDeviceMemoryProperties(_physicalDevice, out var properties);
             var memoryTypes = &properties.MemoryTypes.Element0;
+
+            for (var pass = preferredFlags != 0 ? 0 : 1; pass < 2; pass++)
+            {
+                var wanted = pass == 0 ? requiredFlags | preferredFlags : requiredFlags;
                 for (uint index = 0; index < properties.MemoryTypeCount; index++)
                 {
                     if ((typeBits & (1u << (int)index)) != 0 &&
-                    (memoryTypes[index].PropertyFlags & requiredFlags) == requiredFlags)
+                        (memoryTypes[index].PropertyFlags & wanted) == wanted)
                     {
                         return index;
                     }
                 }
+            }
 
             throw new InvalidOperationException("No compatible Vulkan host-visible memory type was found.");
         }