IBM System/360 System Programmer's Guide

GENERAL LOGIC FLOW
Figures 7 and 8 depict a suggested logic you can use to develop your
editor routines. Note that Figuze 8 (the EOV editor routine) does not
contain logic blocks corresponding to blocks 5, 18, ,and 19 in Figure 7
(the OPEN editor routine). These blocks represent fUnctions that you
must program when receiving control froIT the OPEN routine. You must
test all the DeBs defined by the OPEN macro-instruction before returning
control to the OPEN routine. When receiving control from the EOV
routine, you only have to process one DCB.
Note: If your installation does not support protection and retention
data checking on nonstandard label volumes and does not desire to
maintain retention date checking on standard latel volumes, you need not
implement the functions of logic blocks 6 through 13 in Figures 7 and 8.
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IBM System/360 Specifications

General

Brand	IBM
Model	System/360
Category	Desktop
Language	English