User's Manual

THE 80286 INSTRUCTION SET
WAIT -Wait Until BUSY Pin Is Inactive (HIGH)
Opcode Instruction Clocks Description
98 WAIT
3
Wait until 8USY pin is inactive (HIGH)
FLAGS MODIFIED
None
FLAGS UNDEFINED
None
OPERATION
WAIT suspends execution of 80286 instructions until the BUSY pin is inactive (high). The BUSY pin
is driven by the 80287 numeric processor extension. WAIT is issued to ensure that the numeric instruc-
tion being executed
is complete, and to check for a possible numeric fault (see below). .
PROTECTED MODE EXCEPTIONS
#NM if task switch flag in MSW is set. #MF if 80287 has detected an unmasked numeric error.
REAL ADDRESS MODE EXCEPTIONS
Same as Protected mode.
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