BGI font .OBJ files.

I know that the .CHR font files must have only 4 symbols in the prefix,
but when they are compiled into an .OBJ file, is it ok to have more? For
example, can helv.chr be compiled into
helvitic.obj? What about the public name within the .OBJ file? How many
symbols are allowed there? TIA.

Patrick D. Rockwell