- cachestatus bsize bmax msize mmax      return cache status and
csize cmax blimit                         parameters

wx wy llx lly urx ury setcachedevice -    declare cache character metrics

wx wy setcharwidth -                      declare uncached character metrics

num setcachelimit -                       set max bytes in cached character

* mark lower upper setcacheparams -       sets cache parameters

* - currentcacheparams mark lower upper   returns cache parameters