IBM 7090 User Manual

Even Ring Drive
Odd Ring Drive
Start Clock Pulse
I
o Clock Trigger
Ll.J LlJ
I I
AOD] Clock Pulse
~ __________ ~n~ ____________ ~rl~ ____ __
I t
] Clock Trigger
------~LJ Lj
A] D] Clock Pulse
2
Clock Trigger
A2D]
Clock Pulse
__ ~n~ __________ ~~ n~ ________ ~I~n~ ____ _
---~U u lu~---
_-----In n [ r11-- ___
3 Clock Trigger
4
Clock Trigger
U W I W
-----,~r-------------,~r--~i 0==
______ ~n~ ________ ~n~ ____ ~I~~~
5 Clock Trigger
A5D]
Clock Pulse
w w i w-
____ ------Ir1 r1 I rL
6 Clock Trigger
U U I U-
A6D] Clock Pulse
7
Clock Trigger
A7D]
Clock Pulse
8
Clock Trigger
__ -------In r1 I rt-
W W I w
----------,~r-------r-------,~.------'-I-~
AsD] Clock Pulse
___ -----Inl----+-_------'n I
9 Clock Trigger
W WI
]0 Clock Trigger
AlOD] Clock Pulse
I I
--------~~ I ~ I
u~~!--------~W~I---------
__________ ~n : ~~j------_
]] Clock Trigger
w w
I t
A]] D] Clock Pulse
________________ ~~ M~ ________ _
FIGURE 4.]-]. MULTIPLEXOR CLOCK
40

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