Ithaca 150 Programmer's Manual page 66

Control Codes
Miscellaneous Control
Function
ASCII
Hexadecimal
Decimal
IPCL
EPOS
Function
Response
Description
Page 56
PcOS Series 150
Query marker
[ESC] q <n>
1BH 71H <n>
<27> <113>
none
none
Return status to host
Serial/IEEE1284
[SOH] <n>...
This command can be placed in the print data and, when processed by the
printer, will return a progress status marker. The value of <n> can be any
8-bit value. It is returned to the host unaltered. The intent is for it to be a
sequence number. This command can be used to track the print progress of
the printer or verify that the data has been printed.
Note: This command is a line terminator that causes the printer to print all
previous data. If a normal line terminator (like a [CR]) is not supplied,
right justify and autocenter will not function correctly. All data will be left
justified. [ESC] q does not perform a [CR] or [LF] function.
Rev G
Programmer's Guide
Parallel, non-IEEE 1284
Not supported via PE
12/14/99