IBM 7090 User Manual

Yes
I
IA
Cycle
End Operation
Tgr AlO-16
NO~YeS
~
8.00.09.01
Go to I Time
A10 --19
8.00.12.1
Mst I Time Tgr
All _All
8.00.18.01
It
f
AR-PC
13 (01)
3.06.0S.1
PC ... AS AO (3-17)--
A9 (03) AS A9(03)
3.0S.09.1 3.06.16.1
M=.r.===--~==r-_-J
,
AS --AR
All (01)
3.06.18.1
AR -MAR
y
~
~I
t L---------,.
LTime Call
19 (03)
8.00.16.1
Go to L Time
19 (03)
8.00.12.1
IA
No
Not L Time
Call
8.00.16.1
Go to E Time
19- A7
8.00.12.1
Yes
IA
Get Instr
From Stor
to
SB
SB ..... SR
17 (01)
Reset PR and
SC 17 (01)
Reset Tag
Reg 17 (01)
2.12.S0.1 2.11.40.01
2.08.01.1
~
SB (S, 3-11) --
PR(S,I-9)
17 S02)
2.1 .40.1
+
,
PR (1-S)
-POD
3.01.00.-
•
Address
Modification
f
SB (S, 1, 2)
--PR(S, 8, 9)
17 (02)
2.11 .40.1
'f
PR (6-9)
-SOD
3.07.00.-
SR (18-3S)
-AO(P-17)
19 (03)
Advance
PC 19 (01)
2.12.16.1 2.11.S1.1
t t
~Y"
~
AD (3-17) -
AS 19(03)
3.06.16.01
No
Yes
IA
Cycle
Op 76
~
pri
One Yes
Cycle Inst
No
Turn On Mst L
TimeTgr
All
8.00.20.1
Go to I
Time
8.00.12.1
+
Turn On Mst I
Time Tgr All
8.00.18.1
1
One
Cycle Inst
No
T urn
On Mst
E Time
Tgr All
8.00.19.1
Yes
AS (10-17)
--"SC 111 (01)
2.11.78.1 •
t Next Machine Cycle
FIGURE S.I-I. INSTRUCTION CYCLE
46
J
,
AS-AR
III (01)
3.06.18.1
Set Tag
Reg 18 (02)
2.08.01.1

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