6100 BSC Programming Manual

Writing Applications that Use 6100 BSC
Setting Line Parameters
Most applications don't have to set the line configuration
parameters. Rather, you define the parameters in SYSGEN, and
include AUTOCONF among them. (AUTOCONF applies by default to
BSC, so you don't have to state it explicitly.) With AUTOCONF,
configuration occurs whenever the line is downloaded. If at some
point all openers close the line, the next OPEN call sets the new
configuration. The configuration block downloaded in these
cases is the one CP6100 maintains, as described in the
CP6100 Programming Manual (see AUTOCONF).
For information about line parameters, see "Line Configuration
Options" in Section 1.
If you haven't specified AUTOCONF, or if an application requires
a change in the line configuration, the application makes a
WRITEREAD call with the SET CONFIGURATION request. The values
supplied in the request need not match those in the SYSGEN
configuration file. (That file should reflect the configuration
you use most frequently.)
SET CONFIGURATION is allowed only when the line is in
DISCONNECTED state (see Section 2). It lets you set any
parameter you could define in SYSGEN. Once you set a parameter
or make a change, the value lasts until the next download, or
until the application or CP6100 makes another SET CONFIGURATION
request.
You can use an option in SET CONFIGURATION to supply your own
translation tables. If the line is defined as EBCDIC and you
don't supply your own tables, a standard ASCII-to-EBCDIC
translation occurs upon output, and a standard EBCDIC-to-ASCII
translation occurs upon input.
If you want to use SET CONFIGURATION to supply your own tables,
you must identify the character code as "user-defined EBCDIC";
you specify that line parameter in a subsequent SET CONFIGURATION
request. (You can't specify line parameters and translation
tables in the same request.)
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