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Re: [Qemu-devel] Re: O/2 Warp 4 and eComStation

From: Hampa Hug
Subject: Re: [Qemu-devel] Re: O/2 Warp 4 and eComStation
Date: Fri, 17 Jun 2005 19:58:38 +0200

ecs user wrote:

> > From: Natalia Portillo <address@hidden>
> > Try to boot it with less than 64Mb (48Mb).
> > OS/2 hangs when 64Mb are informed in the standard
> > way they seems to check that in some strange way.
> > No matter it is 4.0, 4.5, eCS or whatever.
> It does seem like a memory issue.
> If I just keep rebooting everytime it hangs, I can
> finally get a complete boot. Sometimes I have to
> reboot 10-15 times. Once it does boot to the desktop
> OS/2 Warp4 runs very nicely. No hangs once completely
> booted and very responsive (on 2GHz machine). So you
> see it acts more like flaky hardware or flaky driver
> (in the emulation).
> Need help.

I looked into this problem about a year ago. As I
recall, the problem was the PIC generating spurious
interrupts. Specifically, if a pending interrupt is
masked on the PIC, the interrupt request to the CPU
is not reset.

I sent a patch to this list that solved the problem
for me (though it was a hack). Unfortunately I can
no longer reproduce the problem (patch or no patch),
but you might still want to try the attached patch.


Attachment: qemu-pic-2005-06-17.diff
Description: Text document

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