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.