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VTxxx—Screen Size
Telnet VTxxx full-screen mode supports the following screen sizes:
v On 3180 display stations:
– 24 x 80 VTxxx screens should display as 24 x 80.
– 24 x 132 VTxxx screens should display as 24 x 132.
v On 5250 display stations:
– 24 x 80 VTxxx screens should display as 24 x 80.
– 24 x 132 screens require the function key assigned to *SHIFTDSP (F10 on
the default keyboard map) to move the information on the screen right or left.
VTxxx—Character Attributes
A VTxxx terminal supports the following attributes:
v Blink
v Bold
v Reverse video
v Underline
v Any combination of the above
The 5250 data stream supports the previous attributes so that all of the VTxxx
attributes can be represented on a 5250 display station. However, there are some
limitations.
v The 5250 data stream can only support three of the character attributes at the
same time. If all VTxxx attributes are selected at the same time by the remote
system, the underline, blink, and reverse video attributes are displayed. Also, the
combination of underline, bold, and reverse image cannot be displayed on a
5250 display station. When a VTxxx application selects this combination,
underline and reverse image are displayed.
v The attribute byte takes up a space on the 5250 display stations that do not
support extended attributes. Attributes do not take up space on a VTxxx terminal.
This means that you do not see all of the data shown on the 5250 display if
character attributes are selected. When VTxxx data is received that is to be
displayed with character attributes, the position before the data is overlaid with
the 5250 attribute byte. The character that was displayed there is lost. If a
character is to be displayed in row 1, column 1 with the attributes set, that
character is not displayed. You can choose not to have the character attributes
displayed by specifying DSPCHRATTR(*NO) on the STRTCPTELN command.
This allows you to see all of the data on the display without attributes.
Note: This restriction is not applicable for displays that support extended attributes
such as the 3477 display.
VT100—Keyboard Indicator
A VT100 terminal has an L1 indicator that can be programmed for different
applications. This indicator is not emulated by the AS/400 Telnet support.
VTxxx—Start TCP/IP Telnet Command
The following optional parameters on the STRTCPTELN or Telnet command are
applicable during a VTxxx full-screen mode session:
166 OS/400 TCP/IP Configuration and Reference V4R4