K 10
svn:author
V 3
imp
K 8
svn:date
V 27
2019-12-16T21:52:12.718718Z
K 7
svn:log
V 218
Use symbolic names for int13 calls

For all the INT13 calls, use symbolic names instead of magic numbers. This makes
it easier to understand what the code is doing w/o a trip to google to find what
these numbers mean.

END