This document contains information on how Natural supports terminal types in a BS2000/OSD environment.
The following types are supported:
As various terminal types which were all defined as 9750 in PDN are often found in networks, the terminal type can also be modified during a Natural session with the terminal command %T= and thereby be made consistent with the device type currently in use.
The various devices of the 975n series differ considerably (for example, possible number of field separation characters per line, default brightness for protected blank lines, standard arrangement of display characteristics to field properties, etc.).
Four terminal driver routines are provided which support these devices. This permits optimum support of black/white devices of the type 9755 or 9756 with respect to their varying display characteristics. The different devices can be generated in PDN as 975n.
Some device types cannot be distinguished by an operating system inquiry (SVC 70). Therefore, Natural permits these "logical terminal types" to be associated with various physical device types during generation.
Under TIAM, this is done with the parameter
T975X.
Under openUTM, the parameter TERMN in
the PTERM statement for the KDCDEF application
generation is used for this purpose.
Terminals of type 9763M (monochrome) are treated like 9756-type terminals.