The "code table" for a font is an index of computer codes used to reference each character image. For example, on computers that use the ASCII  the code hexadecimal 41 will normally represent the upper case character "A". Hex 30 is the character zero "0". The code table is not concerned with the shape and size of each character but simply the convention that is used to reference it. Fonts are normally generated in the Windows 3.1 symbol set "19U".