move keyboard and mouse out of HAL into a standalone ps2.sys driver, implement usb stack with xhci controller discovery, hid keyboard/mouse, and bulk-only mass storage, add pci msi support with capability chain walking and software irq vector allocation (slots 16-23), rewrite user virtual memory as a USER_VA_REGION descriptor arena with per-process ownership tracking and guard page support, replacing the old bump allocator and top-down image region, add MmCreateUserRegion/MmDestroyAllUserRegions so process teardown reclaims all user va in one pass, allocate a pool-backed shadow framebuffer in hal_screen to fix cursor tearing and scroll corruption, reserve ap trampoline page below 1mb in uefi bootloader before boot services exit, rewrite memset/memcpy/memmove/memcmp with __stosq/__movsq intrinsics, promote driver flag literals to macros and add multi-tu STANDALONE_DRIVERS table to build.c, split rtl8139/rtl816x into header+source, rename KbReadScancode to KbReadKey, improve page fault output with MmDebugDescribeAddress and user region dump, fix %p to %016llX throughout.

code/kernel/ke_apc.c

@@ -74,13 +74,13 @@ __declspec(dllexport) bool KeInsertQueueApc(KAPC* apc,
     KeReleaseSpinlock(&thread->ApcLock, flags);
 
     // If the target opted into an alertable wait, make the APC itself the
-    // wait completion.  The target thread will deliver the APC before
+    // wait completion. The target thread will deliver the APC before
     // KeWaitForEvent(..., true) returns STATUS_KERNEL_APC.
     if (wakeAlertable)
         KiWakeThreadForKernelApc(thread);
 
     // If the caller queued an APC to itself at PASSIVE_LEVEL, try to deliver
-    // immediately.  Cross-thread APCs run the next time the target thread
+    // immediately. Cross-thread APCs run the next time the target thread
     // returns to PASSIVE_LEVEL.
     if (thread == KeGetCurrentThread())
         KiDeliverKernelApcs();
@@ -165,7 +165,7 @@ void KiDeliverKernelApcs(void) {
                                &arg2);
 
         // After the kernel routine has had a chance to adjust the callout,
-        // stop touching APC storage before invoking the normal routine.  The
+        // stop touching APC storage before invoking the normal routine. The
         // normal routine is allowed to free the APC's containing allocation.
         apc->SystemArgument1 = (void*)0;
         apc->SystemArgument2 = (void*)0;