HP 1652B Programming Reference Manual page 132

OSTate
OSTate
The OSTate query returns the state where the 0 Marker is positioned. I f
data is not valid, the query returns 32767.
Format:
where:
:: = integer
Example:
10 DIM s0$[1001
20 OUTPUT XXX;":WLIST:OSTATE?"
30 ENTER XXX;So$
40 PRINT So$
50 END
HP 16528/1653B