Null-space conversion – Visara LINCS Features User Manual
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LINCS Features
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codes are defined to indicate that another printer session is busy for host). This situation is
handled for the various host protocols as follows:
• SNA - SNA behaves differently depending on whether or not the printer is configured for
between bracket printer sharing.
• Between bracket sharing allowed - If a printer session is busy for host when an SNA
host tries to begin a bracket with the printer, LINCS returns a sense code “0814” (bracket
bid reject - RTR to follow). When the printer becomes available, SNA sends RTR (ready
to receive) inbound to the PLU (primary logical unit) indicating that the host can now
begin a bracket with this printer session.
• No between bracket sharing allowed - If a printer session is busy for host when an
SNA host tries to BIND the printer, the BIND response is withheld by LINCS until the
printer becomes available. This could take some time since the host which is accessing
the printer may keep the printer busy for an indefinite amount of time. When the printer
becomes available, the BIND response will be sent inbound to the SNA host.
• BSC - If a printer is busy for host when a BSC host attempts to select the printer, LINCS
rejects the select with an RVI response. LINCS then sets the status and sense conditions for
that printer to IR (intervention required). The status and sense conditions are updated to DE
(device end) when the printer becomes available.
• ASCII - If an ASCII host writes data to a printer while the printer is already busy for host,
the data is held in the receive queue until the printer becomes available. If the receive queue
becomes full, the host is XOFFed.
Null-Space Conversion
The Null-Space Conversion feature is available for all 3270 Host Sessions on any CUT device.
It is used to convert nulls to spaces on a 3270 screens. The benefit of this feature is that null
characters on the screen will be converted to spaces and will be transmitted to the 3270 host,
thus maintaining the visible format of the data.
When the Null-Space Conversion feature is not used, null characters on the screen are not
transmitted to a 3270 host. Thus, if you enter data and use the cursor move keys (arrows) rather
than the space bar to separate your words, the words would become concatenated when sent
inbound to the 3270 host.
A name entered as
John Dan Smith
may be sent to the host as
JohnDanSmith
When the Null-Space Conversion feature is enabled, the leading and embedded nulls in a field
will be converted to spaces and will be sent inbound to the 3270 host in the proper format.
The initial status of the Null-Space Conversion feature is determined by Configuration. Once
the LINCS node is IMLed, any operator may enable or disable the Null-Space Conversion
feature by pressing the
(N->) is displayed at column 66 on the status line. This status line location is shared with the
Entry Assist feature as described in the following table.