SECTION 8 " Programming
8-44 VT220/ANSI Terminal Emulation Programmer’s Reference Guide
Device Status Reports (DSR)
Table 8-28 shows the action taken by the wireless station
when it receives device status report exchanges, when the
host computer asks for the general operating status of the
wireless station or printer, or both. If the wireless station is
in printer controller mode, the printer receives the DSR
request but cannot answer.
Table 8-28
Device Status Reports
DSR Exchange Communication Sequence
Wireless Station
Action
VT220
Host to VT220
(Request for terminal status)
CSI 5 n Ignores this code.
VT220 to host
(DA response)
CSI 0 n or
CSI 3 n
Ignores these codes.
Host to VT220
(Request for cursor position)
CSI 6 n “Please report your
cursor position using
a CPR (not DSR) con-
trol sequence.”
VT220 to host
(CPR response)
CSI Pv; Ph R “My cursor is posi-
tioned at _____ (Pv);
_____ (Ph).” (Pv=row,
Ph=column)
Printer port
Host to VT220
(Request for printer status)
CSI ? 15 n Ignores this code.
VT220 to host CSI ? 13 n
CSI ? 10 n
CSI ? 11 n
Ignores these codes.
User-defined
Host to VT220
(Request for UDK status)
CSI ? 25 n Ignores this code.
VT220 to host CSI ? 20 n
CSI ? 21 n
Ignores these codes.
Keyboard lan-
guage
Host to VT220
(Request for keyboard lan-
guage)
CSI ? 26 n Ignores this code.
VT220 to host CSI ? 27; Pn n Ignores this code.
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