ANSI Conformance Levels
This control function lets an application map certain character sets into the terminal's in-use table as default sets. The character sets are based on ANSI conformance levels.
Format
| ESC 1/11 |
SP 2/0 |
Final *** |
Parameters
Final
indicates the ANSI conformance level for the subsequent data exchange.
| Final | ANSI Conformance Level |
|---|---|
| L | Level 1 |
| M | Level 2 |
| N | Level 3 |
Description
ANSI conformance levels represent an agreement between the sender and receiver for compatible data exchange. The control function:
- Acts as an announcer for the data exchange that follows between the terminal and application software.
- Selects which character sets the terminal uses by default in the data exchange.
The VT510 supports three ANSI conformance levels.
ANSI Levels 1 and 2
- ASCII designated as G0.
- ISO Latin-1 supplemental designated as G1.
- G0 mapped into GL.
- G1 mapped into GR.
ANSI Level 3
- ASCII designated as G0.
- G0 mapped into GL.
Notes
- If the terminal is reset, turned off, or changed with a set conformance level (DECSCL) sequence, then the software must send another announcer sequence to the terminal. Otherwise, the terminal uses the default character sets (ASCII in GL, DEC Supplemental or ISO Latin-1 supplemental in GR).