+# ECMA-48 addresses three of the four capabilities here:
+#
+# u6 -
+# 8.3.14 CPR - ACTIVE POSITION REPORT
+# Notation: (Pn1;Pn2) Representation: CSI Pn1;Pn2 05/02
+# Parameter default values: Pn1 = 1; Pn2 = 1
+#
+# u7
+# 8.3.35 DSR - DEVICE ST A TUS REPORT
+# Notation: (Ps) Representation: CSI Ps 06/14
+# Parameter default value: Ps = 0
+# DSR is used either to report the status of the sending device or to
+# request a status report from the receiving device, depending on the
+# parameter values:
+# 6 a report of the active presentation position or of the active data
+# position in the form of ACTIVE POSITION REPORT (CPR) is requested
+#
+# u9 -
+# 8.3.24 DA - DEVICE ATTRIBUTES
+# Notation: (Ps) Representation: CSI Ps 06/03
+# Parameter default value: Ps = 0
+# With a parameter value not equal to 0, DA is used to identify the
+# device which sends the DA. The parameter value is a device type
+# identification code according to a register which is to be established.
+# If the parameter value is 0, DA is used to request an identifying DA
+# from a device.
+#
+# DEC (and most "ANSI") terminals reply with a private-mode ("?") sequence,
+# but that register "which is to be" in ECMA-48 was never established.
+# For terminals that support DA1, a more specific u8 capability is preferred,
+# except for those (such as xterm) which can be configured to return different
+# responses.
+ansi+cpr|ncurses extension for ANSI CPR,
+ u6=\E[%i%d;%dR, u7=\E[6n,