IBM 7090 User Manual

3.06.18.1
SR-.SB
E4 (D3)
Prevent Xfer
Cndtl AD--AS
Prevent Step of
PC
2.10.09.1
Prevent SB ..... SR
E7(D1)
2.12.50.1
2.11.51.1
Retain Op Code
and Decrement
Advance
PC
E9(Dl)
2.11.51.1
FIGURE 5.3-33. TRA +0020 TRAP MODE
•
MF Store
Address
2.09.01.1
t
Step PC
I Time
Pri Op 00
J
I
Trans Ctrl
I
2.11.55.1
~
I Ad~",e PC
I
19(D1)
2.11.51.1
~
~
1
Prevent AD
AS-AR
(3-17) -AS
111(Dl)
19 (D3)
3.06.18.1
2.10.09.1
~
~
~
E Time
1
~ I
MF Store
PC-AS
Orl
EO(D3)
2.09.00.1
3.05.09.1
f
~
AS ..... SR (21-
35)E2(Dl)
3.06.12.1
~
~
•
SR-SB
Prevent
E4(D3)
SB~SR
E7(Dl)
2.09.00.1
2.12.50.1
•
1
T
I
FIGURE 5.3-34. STR -1000
Zero in AR
1
"
1
One -+AS
I
(16) E10(D2)
End Op
EIO (Dl)
3.06.14.1
1
AS --AR
Prevent PC
Ell(Dl)
-AS E9
(D3)
3.06.18.1
3.05.09.1
Td
t
1
I Time
Next Inst
t
AR_PC
13(Dl)
Two
3.06.05.1
in
PC

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