0F0h

0F0h is a hexadecimal literal used in several assembly language syntaxes that employ a trailing h to indicate hexadecimal values. The leading 0 helps ensure the token is interpreted as a number in some assemblers, though since the significant digits include a digit, 0F0h is typically accepted as a hex constant without ambiguity. The value of 0F0h is the decimal 240, since 0F0 in hex equals 15 times 16 plus 0.

In terms of representation, the exact binary form depends on the operand width or the target architecture. As a fixed value, 0F0h can be stored in 8-, 16-, or 32-bit registers, with the low-order bits reflecting the same numeric value (for example, 0x00F0 in 16-bit form). The interpretation remains the same regardless of width, though the surrounding code may assume a particular size.

Usage and context: 0F0h is commonly seen in low-level programming, including memory addressing, bit masking, and immediate constants in 16-bit and 32-bit code. It is characteristic of Intel-style assemblers such as MASM and NASM, which also support variants like F0h or 0FFh depending on the digits that follow. In contrast, languages such as C and C++ use a 0x prefix (for example, 0x0F0) rather than a trailing h suffix.

See also: hexadecimal notation, MASM, NASM, 0x prefix, 0FFh, F0h.