Update NOTES.md

NOTES.md

@@ -4,7 +4,11 @@
 
 - Better page-allocation model
 - Allow for more than one IOAPIC in ACPI module
+  - The objects get created, but GSI lookup only uses the one at index 0
 - Slab allocator for kernel structures
 - mark kernel memory pages global
-- kernel allocator free()
-
+- kernel allocator `free()`
+- lock `memory_manager` and `page_manager` structures
+- Serial out based on circular/bip biffer and interrupts, not spinning on
+  `write_ready()`
+- Get framebuffer screen working again