DECRPM—Report Mode - Terminal To Host
Reports the terminal mode in response to a request mode (DECRQM) function. In the response DECRPM informs the host if a certain mode is set (SM—Set Mode) or reset (RM—Reset Mode).
Programming Tip
Applications can use the information in the DECRPM report to save the current
mode settings. Later, the application can restore the mode settings that were
saved.
This operation is useful for applications that need to temporarily change some of the terminal's mode settings. When the application is finished, it can restore the mode settings that were in effect before the application changed them. You use the set mode (SM) and reset mode (RM) functions to restore mode settings. SM and RM are described later in this chapter.
There are two versions of DECRPM, for ANSI and DEC modes.
Reporting ANSI Modes
| CSI 9/11 |
Pa 3/n |
; 3/11 |
Ps 3/n |
$ 2/4 |
y 7/9 |
Reporting DEC Modes
| CSI 9/11 |
? 3/15 |
Pd 3/n |
; 3/11 |
Ps 3/n |
$ 2/4 |
y 7/9 |
Parameters
Pa
Table 5–6 lists the values for Pa.
Pd
indicates which DEC mode the terminal is reporting on. Table 5–6 lists the
values for Pd.
Ps
indicates the setting of the mode. The Ps values are the same for the ANSI and
DEC versions.
| Ps | Mode Setting |
|---|---|
| 0 | Mode not recognized |
| 1 | Set |
| 2 | Reset |
| 3 | Permanently set |
| 4 | Permanently reset |
Examples
The following sequence reports the setting of a DEC mode:
| VT510 | Report Meaning |
|---|---|
| CSI ? 57; h | (Greek) Keyboard mapping is currently set. (57 = DECNAKB, h = set) |
The following sequences report the setting for some modes:
CSI Ps $ p (or CSI ? Ps $ p (DEC)) (Request Mode)
CSI Ps1; Ps2 $ y (or CSI ? Ps1; Ps2 $ y) (Report Mode)
CSI P1.....Pn l (Reset Mode)
CSI P1.....Pn h (Set Mode)
Notes on DECRPM
The terminal can only report on one mode at a time.
Description
DECRQM, DECRPM, SM, and RM support all the mode settings as follows:
| ANSI Mode | DEC Mode | ||
|---|---|---|---|
| Pa | Mnemonic | Pd | Mnemonic |
| 1 | GATM* | ?1 | DECCKM |
| 2 | KAM | ?2 | DECANM† |
| 3 | CRM | ?3 | DECOLM |
| 4 | IRM | ?4 | DECSCLM |
| 5 | SRTM* | ?5 | DECSCNM |
| ?6 | DECOM | ||
| 7 | VEM* | ?7 | DECAWM |
| ?8 | DECARM | ||
| 10 | HEM* | – | – |
| 11 | PUM* | – | – |
| 12 | SRM | – | – |
| 13 | FEAM* | – | – |
| 14 | FETM* | – | – |
| 15 | MATM* | – | – |
| 16 | TTM* | – | – |
| 17 | SATM* | – | – |
| 18 | TSM* | ?18 | DECPFF |
| 19 | EBM* | ?19 | DECPEX |
| 20 | LNM | – | – |
| – | – | ?25 | DECTCEM |
| – | – | ?34 | DECRLM |
| – | – | ?35 | DECHEBM |
| – | – | ?36 | DECHEM |
| – | – | ?42 | DECNRCM |
| – | – | ?57 | DECNAKB |
| – | – | ?60 | DECHCCM * |
| – | – | ?61 | DECVCCM |
| – | – | ?64 | DECPCCM |
| – | – | ?66 | DECNKM |
| – | – | ?67 | DECBKM |
| – | – | ?68 | DECKBUM |
| – | – | ?69 | DECLRMM (DECVSSM) |
| – | – | ?73 | DECXRLMM |
| – | – | ?95 | DECNCSM |
| – | – | ?96 | DECRLCM |
| – | – | ?97 | DECCRTSM |
| – | – | ?98 | DECARSM |
| – | – | ?99 | DECMCM |
| – | – | ?100 | DECAAM |
| – | – | ?101 | DECCANSM |
| – | – | ?102 | DECNULM |
| – | – | ?103 | DECHDPXM |
| – | – | ?104 | DECESKM |
| – | – | ?106 | DECOSCNM |
*This mode is always reset in the terminal and cannot be changed. †When the terminal is set to VT52 mode, DECRQM provides no report. |
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