Advertisement
Read Call
30
Delay Taps
Write Call
750
ns
Delay
Line
I----,.-----!
Rd Set Ctrl
FL
Tap from
Delay line ____ -'
Wr Set Ctri
FL
Tap from
Delay line ____ --'
Figure 2-71.
Simplified Clock Logic
When a read call signal arrives from the
2030, the read set control latch is turned
on, and the delay line
is
driven.
The read
set control latch allows the delay line tap
Line Name
Logic
200
ns
400
ns
Read Call
MM102
n
,v----~
oA
Read Set Control
MM102
lI'
-
....
Read
1
MM103
/
...
Read
2
MMI03
.r
...,.
..
X .source Read
MM102
V-
1'"'"-
-
Y Source Read
MMI02
-
-
Strobe
MMI03
La..
-
Read Echo
MM113
II
Data Ready
MMI02
Figure 2-72.
Core Storage Read Timings
X SourcE! Read
7
Read Timilll Latches
Y Source Read
FL
' - -
I--
Read
1
Latch
-
-
t-
Read 2 Latch
--
I--
•
Strobe
--
-- --
Data Ready
•
Read Echo
6 Write Timilll Latches
FL
I--
Write A
-
I--
Write B
l -
t-
X Source Write
--
•
--
Y Source Write
• •
Inhibit
Write Echo
outputs to reach the read clock latches
(Figure 2-72).
A read cycle is completed
in 750 nanoseconds--the same time as one
basic 2030 machine cycle.
600 ns
-
. -
-
-
~
\_-...
-
1
\
--
....
-
"
J
,
2:-71
Advertisement
