IBM 7090 User Manual

~
CPU
Inst Reg
S,l- -9
3.04.00.1
Multiplexor
Stg Bus to
CPU Stg Bus
1.00.01.1
1
~
AND
C; 1- 1111 -
-~
T
i
CPU
Storage Reg
S,l- -35
2.01.00.1
CPU
Memory Data
Register
Out Sw's
0- -35136-
-71
1
1
Multiplexor
Storage
Bus
S,l-
-20 I 21-
-35
I
I
l
+
,
-~
Channel Bus
Channel Bus
Multiplexor
A-D E - H
Address
Sw's
S,l-
-35
S,l-
-35 3-
-17
2.05.10.1
2.05.10.1
3.06.22.1
~
!
1
Channel
Channel
Channel Location
Input Switches Input Switches
Counter Sw's
$,1-
A-D
-35
S,l-
E-H
-35
3-
E-H
-17
60.26.01.1
60.26.01.1
60.10.13.1
Channel Location
Counter Switches
A-D
3-
-17
60.10.13.1
FIGURE 4.1-2. FLOW FROM MULTIPLEXOR TO CPU
AND DATA CHANNELS
Channel
A-D
Channel E-H
Storage Register
Stg Bus Sw's
Stg Bus Sw's
S.l
-35
S,l- -35
S,l-
2.01.00.1
60.10.19.1
60.10.19.1
I
1 1
~
Multiplexor
Stg Bus OR'ing
2.05.22.1
1
Memory Data
Register
in Sw's
0- -71
FIGURE 4.1-3. FLOW FROM CPU AND DATA CHANNELS
TO MULTIPLEXOR
42
I
-35
~
Memory
Address Register
3-
-17
1.02.00.1

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