I seem to vaguely recall that there a method in D3 to determine if data is
queued up from a DATA statement. I have been unable to find any reference
to it either in the D3 documentation or on-line.

I am not referring to the use of SYSTEM(14).

Needless to say, whatever information anyone in CDP may be able to provide
would be welcome.

thanks

system(10)

It's not real clear, is it? The documentation has more to do with the
stacking of data from a proc.

hth

Dale

"Not real clear" is an understatement. Thanks.


<dale_benedict (AT) flightcraft (DOT) ca> wrote

In D3, not sure about others:

DATA "Y"
DATA "Y"
DATA "Y"
DATA "N"
DATA "N"
DATA "N"
EXECUTE "FILE-SAVE"


"Brian Bond" <brian (AT) XYZXYZXYZXYZbonanzapress (DOT) com> wrote

System(10) is a boolean. 1 if there is data in the queue and 0 if not.

I use it like:

if not(system(10)) then "Print Enter User ID: ":
input userID:

that way, if there is no data stacked, prompt for the data. If there IS
data in the queue, don't bother asking for it, just take it.

It would probably make more sense if the value was 0 if nothing queued and >
0 for the actual number of elements queued. But the code is a simple: set
a register, increment it one byte, if you're not on a segment mark, there
must be data.


Mark Brown


<dale_benedict (AT) flightcraft (DOT) ca> wrote