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IBM 3741 Operator's Manual page 93

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About the Accumulators
In Enter mode, the accumulators carry true totals. If yo
change data in an accumulate field, the accumulator reflects
this change.
In Update and Verify modes, accumulators contain the
differences between the original data and the changed data.
Deleting a record or backspacing to a previous record from a
partially entered, updated, or verify-corrected record, sub-
tracts all accumulate fields from accumulators. See the follow-
ing field totals restrictions.
Field Total Restrictions
1-
2.
You can record backspace over a readout field in the
current record and the previous record only.
When record backspacing from completed records, the
accumulators reflect the most advanced record written
on disk. No subtraction of accumulator fields occur as
they are backspaced over.
3.
4.
5.
6.
Execute all succeeding readout/reset fields affected after
updating, verify correcting, or deleting a record. To do
this, you can record advance to the record with the
readout/reset field, select the correct program, and field
advance to and over the readout/reset field.
In Update mode or with the alternate Record Advance
mode, a readout/reset field isn't executed if you press
REC ADV with the cursor ahead of the readout/reset
field. You can use FIELD ADV to advance the cursor
to and over the readout/reset field to execute the field
total operation.
If deleting a record or backspacing to a previous record
from a partially entered, updated, or verify-corrected
record, you must have the same program selected as
when making that record.
Avoid selecting second disk functions, communications
functions, and print functions (other than print record).
7.
Load programs when the machine is at program level 0.
8.
If you return the cursor to the first position of a record
and then select a different program, this program must
have identical field total fields.
83

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