Intel 210200-002 manual Halthlt, 11110100

HLT

HALTHLT

Operation: Flags Affected:

NoneNone

Description:

HLT (Halt) causes the CPU to enter the halt state. The processor leaves the halt state upon activation of the RESET line, upon receipt of a non-maskable interrupt request on NMI, or, if interrupts are enabled, upon receipt of a mask-

able interrupt request on INTR. HLT does not affect any flags. It may be used as an alterna- tive to an endless software loop in situations where a program must wait for an interrupt.

Encoding:

11110100

HLT Operands Clocks Transfers Bytes HLT Coding Example

(no operands) 2 - 1 HLT

2-76