12. Integer Constants

•         mov     ax, 25
          mov     bx, 0B3h
  

• Numerals are followed by an optional radix specifier.

• Radix is the number base suffix:

  • y for binary (or b if the default radix is not hexadecimal)

  • o or q for octal

  • t for decimal (or d if the default radix is not hexadecimal)

  • h for hexadecimal.

• Default radix is decimal, but you can change the default with the .RADIX directive.

• Hexadecimal numbers must always start with a decimal digit (0–9). If necessary, add a leading zero.