BCD Binary-Coded Decimal ───────────────────────────────────────────────────── BCD is a way to represent decimal numbers in a more compact way than ASCII text. One byte represents two digits: 01H = 1 decimal 20H = 20 decimal (not 32) 99H = 99 decimal (not 153) ───────────────────────────────────────────────────── ■ BCD is used rarely on PCs and in PC programming. ■ Note that hex digits A-F are never used, so numbers such as 0aH or b1H are invalid as BCD values.