mc146818a: add support for all three drift modes
tree93facbecb5e59619529dbbe69cae331edd96899c
-rw-r--r-- 61 .gitignore
-rw-r--r-- 615 Makefile
drwxr-xr-x - device
drwxr-xr-x - include
drwxr-xr-x - marshal
drwxr-xr-x - pc
drwxr-xr-x - test
drwxr-xr-x - time