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Re: [Qemu-devel] [PATCH 0 of 1] Fix for DOS keyboard problems

From: Jamie Lokier
Subject: Re: [Qemu-devel] [PATCH 0 of 1] Fix for DOS keyboard problems
Date: Mon, 24 Aug 2009 10:22:14 +0100
User-agent: Mutt/1.5.13 (2006-08-11)

Stefan Ring wrote:
> I will try to run C&C in Bochs, and I'm definitely not surprised that
> my hack doesn't fix that as I'm almost 100% certain that it does its
> own keyboard processing and bypasses the BIOS entirely (as virtually
> all games do).

On the other hand, I'd expect virtually all of the ones which handle
the keyboard themselves (and disable the BIOS IRQ) to read port 0x60
exactly once per scan code.

Which implies something else is broken too.

Btw, a timer won't necessarily fix the problem seen with Borland, if
QEMU/KVM are preempted at the wrong moment - unless there's a virtual
CPU timer available which is not affected by host scheduling.

-- Jamie

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