/opcodes/dec

Description

The byte specified by the m operand is decremented.

Example

If the D Register contains byte 2Ah, then upon the execution of a DEC D instruction, the D Register contains 29h. General-Purpose Arithmetic and CPU Control Groups The following general-purpose arithmetic and CPU control group instructions are each described in this section. Simply click to jump to an instruction’s description to learn more. DAA – see page 173 CPL – see page 175 NEG – see page 176 CCF – see page 178 SCF – see page 179 NOP – see page 180 HALT – see page 181 DI – see page 182 EI – see page 183 IM 0 – see page 184 IM 1 – see page 185 IM 2 – see page 186

Opcodes