ILE COBOL Language Reference
EXTDSPOPT specifies the options to use for extended ACCEPT and
extended DISPLAY statements for workstation I/O, and takes the form:
EXTDSPOPT(a b c)
Where a is DFRWRT or NODFRWRT, b is UNDSPCHR or
NOUNDSPCHR, and c is ACCUPDALL or ACCUPDNE.
- DFRWRT indicates that extended DISPLAY statements are held in a
buffer until an extended ACCEPT statement is encountered, or until the buffer
is filled.
The contents of the buffer are written to the display when the extended
ACCEPT statement is encountered or the buffer is full. DFRWRT is the
default value.
- NODFRWRT indicates that each extended DISPLAY statement is
performed as it is encountered.
- UNDSPCHR indicates that displayable and undisplayable
characters are handled by extended ACCEPT and extended DISPLAY
statements. UNDSPCHR is the default value.
- NOUNDSPCHR indicates that only displayable characters are
handled by extended ACCEPT and extended DISPLAY statements.
Although you must use this option for display stations attached to remote
3174 and 3274 controllers, you can also use it for local work stations.
If you do use this option, your data must contain displayable
characters. If the data contains values less than hexadecimal 20, the
results are not predictable, ranging from unexpected display formats to severe
errors.
- ACCUPDALL indicates that all types of data are predisplayed in
the extended ACCEPT statements regardless of the existence of the UPDATE
phrase. ACCUPDALL is the default value.
- ACCUPDNE indicates that only numeric edited data are
predisplayed in the extended ACCEPT statements that do not contain the UPDATE
phrase.
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