DA2—Secondary Device Attributes

In this DA exchange, the host requests the terminal's identification code, firmware version level, and hardware options.

Host Request

The host uses the following sequence to send this request:

CSI
9/11
>
3/14
c
6/3
or CSI
9/11
>
3/14
0
3/0
c
6/3

Terminal Response

The terminal with a VT keyboard uses the following sequence to respond:

CSI
9/11
>
3/14
6
3/6
1
3/1
;
3/11
Pv
3/n
;
3/11
0
3/0
c
6/3
DA2R for terminal with STD keyboard.
CSI
9/11
>
3/14
6
3/6
1
3/1
;
3/11
Pv
3/n
;
3/11
1
3/1
c
6/3
DA2R for terminal with PC keyboard.

Parameters

61
indicates the identification code of the terminal for the secondary device attributes command.

Pv
indicates the version level of the firmware implementing the terminal management functions, for example, editing, as shown in the following table.

Pv Version
10 V1.0 (released version 1.0)
20 V2.0 (released version 2.0)

Secondary DA Example

The following is a typical secondary DA exchange:

Exchange Sequence Meaning
Request (Host to VT510) CSI > c or CSI > 0 c The host asks for the terminal's identification, firmware version, current hardware options.
Response (VT510 to host) CSI > 61; 20; 1 c The terminal identifies itself as a VT510 that uses version 2.0 firmware, and has a PC keyboard option.