Re: Date and time not updating in Applesoft BASIC program?

[DMn2004404 <dmn2004404@gmail.com>]

And, if my program should include storing values in memory locations
(such as losses in location 768, ties in location 769, and wins in
location 770), what will happen to those values when the program
encounters the FLUSH command?

Brandon

Michael J. Mahon wrote:
> Michael J. Mahon wrote:
> > DMn2004404 wrote:
> >
> >> Here's the scenario: I have written an Applesoft BASIC program that
> >> uses a No-Slot Clock in my Enhanced Apple //e. I have RUN the program
> >> and had it execute a routine that displays the system date and time.
> >> When the program reaches this routine at, let's say, 6:32 PM, it says
> >> the time is 6:32 PM. So far, it appears the date and time routine is
> >> working properly. But, let's say I've had this same program running
> >> continuously for, say, two minutes, and the time is now 6:34 PM, but
> >> when I send the computer back to the date and time routine, the
> >> program says the time is still 6:32 PM. What's the deal here, and is
> >> there any way to rectify it?
> >
> >
> > You didn't mention how your Applesoft program was getting the time,
> > but I'm guessing that it's PEEKing it from the locations in the
> > ProDOS global page.
> >
> > ProDOS only updates this location when a ProDOS file operation is
> > executed.  If you do a PRINT CHR$(4)"verify" command, ProDos will
> > update the global page time and date.
>
> Sorry, I misremembered--the proper command to update the date/time
> on the global page without messing anything else up is FLUSH.
>
> So just insert:
>
> 1234 PRINT CHR$(4)"FLUSH"
>
> (with the appropriate line number, of course) before you read the
> global page bytes and they will be up-to-date.  No machine language
> needed.
>
> -michael
>
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>
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