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FUNCTIONAL DESCRIPTION
M1
(OF)
SIGNAL
T1
T2
TWAIT
T3
T4
TS
TS
-
LI
LI LI
LI
L.I
L..I
LJ
ClK
101M,
I--
tx
IO/M-0,S1-1,SO-1
S1,SO
I--
I--
tx
AS-A16
PCH
UNSPECIFIED
I--
I--
OUT
IN
AD
O
·AD
7
tx
PCl
~<
DO.[)7 (DCX)
);-
-----
~---
-
~---
I--
!
j
ALE
v---\
J
I--
1
iffi
'~
......
READY
"'C..---
~
,....
"C---
~
FIGURE 2·14 OPCODE FETCH MACHINE CYCLE WITH ONE WAIT STATE
MR OR lOR
MR OR lOR
SIGNAL
T1
T2 T3
T1
T2
TWA
IT
T3
....
'---.I'
~
LI
'---.I'
'---'
~
U-
~
C~K
-
101M,
101M = 0 (MR) OR 1 (lOR),
S1
= 1,
SO
= 0
101M = 0 (MR)
OR
1 (lOR),
S1
= 1,SO = 0
S1,SO
-
-
:x
AS"A1S
-
OUT
IN
OUT
-
)(
r>--{
>-
1>(
AOo·AD
7
AO-A7
D
O
·D
7
Ao-A7
....
!
)
ALE
1\
1\
~
1..
~
iffi
I~
....,
READY
'L--
N
FIGURE 2·15 MEMORY READ (OR
1/0
READ) MACHINE CYCLES
(WITH AND WITHOUT WAIT STATES)
2·11
""""
""C---
IN
D
O
·D
7
'C---
~
~
~
)(
)(
7
1-<
V-
f-
~