HP 4 FAMILY - Manual (Page 200)

The gray shaded areas in these tables denote printer
control code areas. Math composite characters are shown
with light-colored shades, and line-draw composite
characters are shown with dark-colored shades. Composite
characters are made by combining individual character
elements into a large character.
The International Organization for Standardization (ISO)
symbol sets and the HP German and HP Spanish symbol
sets are represented by a character substitution table (see
page B-19). The final table, the Roman-8 Character
Conversion table identifies the hexadecimal, decimal, and
octal codes for the Roman-8 symbol set.
Note To identify the symbol sets that are supported by a printer,
refer to Chapter 3, Internal Typefaces/Fonts and Symbol
Sets,” in this document.
B-2 Internal Symbol Set Charts