Re: xenix install problems

From: gilles <gilles.fetis_at_email.domain.hidden>
Date: Thu, 12 Jul 2007 01:53:42 -0700

I found the problem.
Xenix uses T1 and T2 timers to generate interrupts. If T1 elapse and T2 elapse when T1 interrupt is served, the interrupt vector does not clear the T2 bit in the IFR register. Interrupts are broken after that event.
The VIA emulation is ok, so the problem is probably in the 68k core that should relaunch the IRQ since the line remains set.

On 7 juil, 20:01, gilles <gilles.fe..._at_email.domain.hidden> wrote:
> My emulator now installs and run Xenix. But it may hang sometimes,
> probably an IRQ related issue.
> The new version will be available in the next days.
> On 3 juil, 12:13, gilles <gilles.fe..._at_email.domain.hidden> wrote:
> > > - turn off and on, or press reset
> > > - at the "Startup from" menu, type Apple-3 (Apple-1 does not work for me).

> > I have a similar problem with my emulator, the boot ROM (H) sets a 00
> > for the boot device while the boot sector on the profile needs to
> > determine if it is a floppy or a profile boot. With Apple-3 the code
> > is correct and I have the "boot:" prompt.
> > I also found that if a profile is formatted and LOS installed, the
> > hdinit fails with a core dump (for a stack overflow). It took me a
> > long time to analyse but it seems more a Xenix bug than an emulator
> > issue.
> > For now I can't go further in Xenix installation because the disk
> > emulation is not totaly accurate with disk detection. Only the first
> > disk of the system distribution can be installed, the second is not
> > detected.- Masquer le texte des messages précédents -
> - Afficher le texte des messages précédents -

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