Re: [hatari-devel] SCC issues (vs. real MegaSTE) mentioned in Atari-forum

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 12/09/2024 à 10:35, Thomas Huth a écrit :
> On 10/09/2024 16.38, Nicolas Pomarède wrote:
> > Le 08/09/2024 à 13:06, Eero Tamminen a écrit :
> > > Hi,
> > >
> > > On 7.9.2024 16.34, Nicolas Pomarède wrote:
> > > > Le 04/09/2024 à 23:48, Eero Tamminen a écrit :
> > > > > There are couple of SCC issues mentioned on Atari forum compared to 
> > > > > how things work on real MegaSTE:
> > > > > https://www.atari-forum.com/viewtopic.php?p=459561#p459561
> > > >
> > > > just to be sure, from what the user is telling, doesn't he refer to 
> > > > serial port through MFP and not through SCC ?
> > > >
> > > > He made some tests in february, but at that time Hatari 2.5 was not 
> > > > released yet, so it was using the old SCC code.
> > > >
> > > > and it's not clear when he says he tried git version, what port did 
> > > > he try ?
> > >
> > > I asked about that, but it may be better for you to ask more detailed 
> > > questions there, as I'm not really familiar with MFP/SCC or SW using 
> > > those...
> >
> > Hi
> >
> > from his answer I see some code is not present in MFP case as in SCC 
> > to handle DCD signal.
> >
> > I'm looking at this to make both code more similar but I see rs232.c 
> > is using File_Open to open the in/out file associated with the serial 
> > port, and not using open() directly as in scc.c
> >
> > Is there any reason for that ? I see File_Open allows to use stderr 
> > and stdout as a filename but is that really used for rs232 emulation ?
>
> At least on Linux, one could also use open() with /dev/stderr or 
> /dev/stdout for that.
>
> > If not, I'd rather replace use of "FILE *" handler by file descriptor 
> > number (as returned by open() )
> >
> > Any idea on that ?
>
> I think it's mainly that way since this is based on very old WinSTon 
> code. Back then, I rather replaced the Windows functions with the 
> portable fopen() etc. instead of using the low-level functions instead.

Hi

I had the feeling it was based on old windows code ; I will leave it 
that way with File_Open and do changes over that

Nicolas