R_DefFnt()      Install default ROM font (EGA or VGA)
 R_EGAFnt()      Install one of the INTERNAL (built-in) EGA fonts
 R_EGAName()     Retrieve the name of an INTERNAL (built-in) EGA font
 R_FntFile()     Install an external EGA or VGA font from a disk file
 R_FntName()     Retrieve the name of the current font
 R_FntNr()       Retrieve the number of the current font
 R_FntStr()      Install an external EGA or VGA font from a string
 R_IsEGAFl()     Determine if an EGA card is present
 R_IsVGAFl()     Determine if an VGA card is present
 R_MaxFnt()      Determine number of INTERNAL (built-in) fonts
 R_VGAFnt()      Install one of the INTERNAL (built-in) VGA fonts
 R_VGAName()     Retrieve the name of an INTERNAL (built-in) VGA font