IBM 7090 User Manual

Step SC Each
Clock Pulse
2.11.79.1
I Time
Pri Op 76
2.11.78.1
L Time
Shift Gate L 1 to
SC = 0
ALS Orl
2.09.70.1
Yes
Turn On AC
Ov Tgr
2.10.36.1
L E,ld Op
Al0(Dl)
8.00.01.1
FIGURE 5.3-9. ALS +0767
I Time
Pri Op 76
AS(1O-17) .... SC
III (Dl)
2.11.78 1
L
Time
LEnd Op
Al0 (Dl)
8.00.01.1
~ ~Yes
~~
t L_:::::.._---+===~__1 LLS Inst
Shift Gate Ll .---------<1'2.09 .70.V
to SC = 0 '-...../
2.11.79.1
Set
MQ(S)
-AC(S)
($?
o 2.12.42.1
ACl = 1 MQ(1)--..AC(35
r--_--'_Y_es--, 2.12.42.1
~---r--""""
<2>
LGL
-
Turn On AC
Ov Tgr
MQ(l )-MQ(S)
Step SC Each
Clock Pulse
2.11.79.1
2.10.36.1
,
Set and Sh i ft AC
(P-35) and MQ
(2-35)
Lt
2.12.34.1
2.12.42.1
t
SC Stepped and
AC-MQ Shifted
Every Clock Pulse
I
2.12.42.1
FIGURE 5.3-10. LLS +0763; LGL -0763
MQ(S)- AC
(35)
2.12.42.1

IBM 7090 Specifications

General

Category	Mainframe Computer
Introduced	1959
Transistor-based	Yes
Word Length	36 bits
Add Time	4.8 microseconds
Memory	Core memory
Memory (words)	32, 768 words