Yes, but 627A, 628A, 648A (all use same data sheet ) has Comparators, whereas the F84 does not. So add CMCON = 7 to disable them. Please look at this thread: http://www.picbasic.co.uk/forum/showthread.php?t=561,
Now as far as using Internal Osc, read this thread:
http://www.picbasic.co.uk/forum/showthread.php?t=543