IBM 3741 Data Station Reference Manual page 130

Figure 73 shows the data flow when formatting the record
in the current record buffer.
Program
Level A
Program
Levels 1-8
(Input Buffer)
Current
Record
Buffer
1. 2.
(Output Buffer)
Program level 9: the
date is formatted
using program level
A and the appropriate
program level.
1. Press FUNCT SEL lower and X to
transfer data to program level 9.
2. Formatted data is returned to cur-
rent record buffer.
Note: R EC ADV must be pressed to
write the data to disk.
Figure 73. Data Flow When Formatting Current Record Buffer
Format Control Examples
Example 1 - Manual Selection of Format Con trol Programs
Program level A contains:
11
2 3 4 5 6 7 8· 9
~Position
in program level A
\
(Colon)
124
~
indicates the program level
used if a read/punch opera-
tion is initiated, while pro-
gram level 5 is selected for
entering or updating data on
disk. (See Program Level A
for more information on
selecting format control
programs.)