IBM 1130 User Manual page 655

Initialization
Arithmetic
r--_ _ _ _
~_I
OJlERLAY JlRITII
... -• ...---- WITII NON-DiSK I/O
Read Card
• OYERLAY NON-DISK
..----- WITH ARITii
Look up key
item number
.n index table
NOVE DISK ARM
~
___
~
__ I
FROM
OVERLAY
- . . . - - - -AREA rOFILE AREA
Read a disk
record for
an item
_ Check it against
Not the item number
found on the card
Not
finished
Found
~
Calculations
Write a new
disk record
MOVE f)ISK ARM
F.I?OJl1 FILE AREA
I .----
TO OVERLAY AREA
.--_---:,l..-. . . .
~~
Ot/ERLAY A R
I
T
1-1
WITH AlON-OISK £/0
Print results
• Ot/ERLAY NON-DISK
. - - - - WITH ARITHMETIC
Miscellaneous
arithmetic
Finished _
-
Print
Grand
Totals
~XIT
Figure 90.3. Overlays and disk arm movements required at
SOCAL level 1
Section
Subsections
Initialization
Arithmetic
90
10
......-____ ~ .. I
OJlERLAY JlRITfI
- . ...---- WITII NON-DI.5K I/O
Read Card
• OYERLAY NON-DISK
..----- WITH ARITii
Look up key
item number
in index table
NOVE DISK ARM
.-----.aM
_I
FROM
OVERLAY
--. . . - - - -AREA
rOFILE
AREA
r-----L--~__,
OVERLAY All/TN
WITH
Read a disk
record for
an item
DISK
I/O
MOVE ARM TO OV£III.AY
I .----
,qR£A
I
,...-_ _ ........
,_~_---.
OVERI.,l/Y LJISK I/O WITH
I'1RITIIMET/C
_ Check it against
Not the item number
found on the card
Found
t
Calculations
10
OVERLAY
/Ill/TN WITN
I ..---
OI$K
I/O
, 4 - -
MOVE ARM TO FILE ,qIU',I/
,..-----------.
Not
finished
Write a new
disk record
MOVE f)ISK ARM
F.I?OJl1 FILE AREA
I .----
TO OVERLAY AREA
,...--_ _ ........ ' _ .... _-. Ot/ERLAY tJISK
WITH AlON-OISK £/0
Print results
Ol/ERLAY NON-DISK
t .----
WITH ARITHMETIC
Miscellaneous
arithmetic
Finished _
...
Print
Grand
Totals
~XIT
Figme 90.4. Overlays and disk arm movementS required at
SOCAL level 2
Page
02