Filter
Top Products
inter
iAPX 88/10
Table 1.
Pin
Description (Continued)
Symbol Pin No.
Type
Name and Function
lOCK
29
a
lOCK: indicates that
other
system bus masters are
not
to
gain
control
of
the
system bus
while
lOCK
is active (lOW). The
lOCK
signal is activated by
the
"lOCK"
prefix
instruction
and remains active until the completion
of
the
next
instruction.
This signal is active lOW, and floats
to
3·state
off
in
"hold
acknowl-
edge".
OS1,OSO
24, 25
a
Queue Status: provide status to
allow
external
aS1 I
aso
I CHARACTERISTICS
tracking
of
the internal 8088 instruction queue.
OllOW!
i 0 !
Joperati~n
o
"I
The queue status is valid
during
the
ClK
cycle
~
(HIGH)
I
~
I
S~b;~q'u;~t~b;t;
,
qoo",
after
which
the queue operation is performed.
-
34
a Pin 34 is always high in the maximum mode.
41
AFN-00826D