Introduction - HP 262SA Reference Manual

Status
INTRODUCTION
8
Status requests are issued as escape sequences. On receipt of a status request, the terminal
sends a block of status data to the computer. This data is in the form of a data block, such as is
generated in Block mode. For handshaking and block-terminating character information,
refer to Section 9.
There are seven types of status requests:
1. Terminal Identification. This request is the means by which your program determines
the kind of terminal it is communicating with.
2. Terminal Features. There are four types of terminal features requests: alphanumeric
capabilities, graphics capabilities, interface capabilities, and amount of RAM memory.
3. Primary Terminal Status. This request returns seven bytes that report the status of some
of the latching keys, various error and pending flags, and the following Terminal Configu-
ration menu fields:
XmitFnctn(A)
SPOW(B)
InhEolWrp(C)
Line/Page(D)
InhHndshk(G>
InhDC2(H>
4. Secondary Terminal Status. This request returns seven bytes that report the status of the
memory lock, buffer memory, and I/O firmware.
5. Device Status. This request returns three bytes th~t report the status of the integral
printer or external device.
6. Cursor Position Sensing. This request returns an escape sequence containing the row and
column in which the cursor is located. Cursor position sensing is described in Section
4.
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