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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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