Computing Record Length - IBM 1130 User Manual

COMPUTING RECORD LENGTH
Once you have decided what data will be included in
your disk record, you may easily calculate the
length of the record by listing the fields in the record,
totalling the number of real fields (called R), the
number of integer fields (called I), and using the
table below to determine the number of words:
*EXTENDED No
PRECISION Precision
Card Used
Card Used
*ONE
WORD
INTEGERS WORDS
=
WORDS
=
Card Used (3xR) +I (2xR) +I
No
Integers WORDS
=
WORDS
=
Card Used (3xR) +(3xI) (2xR) +(2xI)
Section Subsections Page
80
50
I
00
01
In the case of fields comprising the items of an
array (often alphameric data), the number of items
is the size of the array. For example, if you have
a field conSisting of a 16-character name, placed
two characters per word
(A2
format) in the array
NAME, this will count as eight items rather than
one, when you are calculating 1.
The task is simplified by the fact that *ONE
WORD INTEGERS should always be used, reducing
all integers to one word per field. Except in very
unusual cases, you should compile all of your pro-
grams using the *ONE WORD INTEGERS control
card.