Only the upper half (characters 0x80–0xFF) of this extended ASCII table differs from code page 437, the lower half (0x00–0x7F) being the same. This character set encodes distinct visual forms separately.
IRAN SYSTEM to Unicode at the Wayback Machine (archived 2020-08-01) https://web.archive.org/web/20200801234901id_/http://sofia.nmsu.edu/~mleisher/Software/csets/IRANSYSTEM.TXT ↩