Re: [hatari-devel] Real time clock support

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 06/04/2016 19:39, Roger Burrows a écrit :

> The Mega uses the RP5C15, which is incompatible on a register level with the
> chip used in the TT/Falcon.

you're right, as the mc146818a existed in 1984 I wrongly thought it was 
also in the mega st.
That's the TT and the Falcon which share this same chip.

> > The mega st has several registers dedicated to each unit in the rtc
> > (hor, minute, ...), while the falcon has a "select register" and a "data
> > register", but they're functionaly the same.
> >
> > Then not all the MC146818A datasheet is implemented, but as it's
> > correctly documented it should not be too much a problem.
> You'll need the RP5C15 datasheet.  I can email a PDF if you like.

it's ok, I found it on http://dev-docs.atariforge.org/.
current implementation doesn't support write or alarm mode for example.

If no one works on it, I will try to improve it, but it won't be before 
several weeks as I'm currently busy with video emulation.

Nicolas