[Oberon] File time stamps in PO2013

[Michael Schierl]

Hello,


Am 13.02.2020 um 20:36 schrieb Charles Perkins:

> Now I know that the FPGA doesn't actually have a real time clock and I
> think the time is always actually zero unless you set it to something
> else. I don't think it gets updated from the system millisecond timer
> either.

If you want it updated from the millisecond timer (on demand when
Kernel.Clock is read), you can use this patch:

<https://github.com/schierlm/Oberon2013Modifications/blob/master/RealTimeClock/RealTimeClock.patch>

If you are using any of my emulators, you can add this patch to get it
initialized at boot time:

<https://github.com/schierlm/Oberon2013Modifications/blob/master/RealTimeClock/EmulatorSupport.patch>

Currenty it will initialize the year with 20 that way. You could also
initialize it with 0, and gain 20 more years. I would not initialize it
with 10 (when you use my code) since it will break the leap year
detection (in case you ever keep the system running past midnight on the
last day of February).

> Anybody have a good idea? Should I just make it based on Jan 1 1970 like
> Unix, in which case it rolls over in 2033?

I would say that is a bad choice (if you do not change the output code
for System.Directory), since that output code will output the year
number in a form that makes you assume it is a 2-digit year.

> Am I over-thinking this?

Probably, too :)


Regards,


Michael