IBM 7090 User Manual

Address
Modification
XR .... Adders
2.12.19.1
AD (3-17)_
AS 19 OJ
3.06.16.1
SR (18-35) .....
AD (P-17)
AS -~ AR
III D1
3.06.18.1
AD(3-17)-AS
E9 D3
Turn off IA Tgr
Ell Dl
2.10.65.1
I Time of IA
Type Instruc-
tion
Prevent Most of
E
Time Outputs
2.15.13.1
SB _SR
E7D1
2.12.50.1
No
Next Cycle
Determined by
Instruction
FIGURE
5.2-1. INDIRECT ADDRESSING
48
Turn on IA Tgr
19
D
1
2.10.65.1
PC -+-AS
A9 (D3)
3.05.09.1

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