replace the VHD/diskpart disk image pipeline with a directory-based vvfat root, we'll see when it breaks, fix /O2, add an all_tests, generalize the fat32 driver into a fat 16+32 driver, change policy on volume drivers, collapse KCPU's fields into a single atomic KE_CPU_STATE state machine, move scheduler ticking to per-CPU LAPIC timers, gate verbose SMP topology logging behind selftest diagnostics and add SMP pool-checkpoint validation around AP admission, add checked intrusive list helpers behind a new KE_DEBUG_LIST_CHECKS flag, add ObInitializeObjectHeader/ObTryReferenceObject, add waitable display clock objects and a SYS_OPEN_DISPLAY_CLOCK syscall for vsync-style waits, refactor kernel input into a per-queue KE_INPUT_CONTEXT with its own key/mouse ring buffers and DPC-driven key repeat, add KeInputQueuePeekEvent/ReadEvent/WaitKey and a SYS_QUERY_GLOBAL_INPUT_STATE syscall, split the kernel pool allocator out of mm_virt, new video files!

code/drivers/fs/fat/fat_mount.c

@@ -0,0 +1,28 @@
+// FAT mount logic. This file owns volume probing, BPB validation, and mount-table insertion.
+
+#include "fat.h"
+
+// Initializes vtable.
+void FatInitVtable(IO_FILESYSTEM* fs, FAT_VOL* vol) {
+    memset(fs, 0, sizeof(*fs));
+    fs->Open       = FatOpen;
+    fs->Read       = FatRead;
+    fs->Write      = FatWrite;
+    fs->ReadAsync  = FatReadAsync;
+    fs->WriteAsync = FatWriteAsync;
+    fs->Create     = FatCreate;
+    fs->Delete     = FatDelete;
+    fs->CreateDir  = FatCreateDir;
+    fs->RemoveDir  = FatRemoveDir;
+    fs->Truncate   = FatTruncate;
+    fs->GetSize    = FatGetSize;
+    fs->QueryInfo  = FatQueryInfo;
+    fs->Stat       = FatStat;
+    fs->QueryIdentity = FatQueryIdentity;
+    fs->Close      = FatClose;
+    fs->DriverCtx  = vol;
+    fs->OpenDir    = FatOpenDir;
+    fs->ReadDir    = FatReadDir;
+    fs->CloseDir   = FatCloseDir;
+    fs->QueryStats = FatQueryStats;
+}