The blastall program is part of the C-toolkit based legacy blast package. That package has been superseded by
the blast+ package based on the NCBI C++ toolkit.
Extensive document is available for the blast+ package from the NCBI Bookshelf. See BLAST User Manual for more details.
A list of core program switches is listed in this
A handout on PC blast+ setup is available from the factsheet page under
NCBI education site.