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Re: [Qemu-devel] [PATCH] Implement PC port80 debug register.


From: Avi Kivity
Subject: Re: [Qemu-devel] [PATCH] Implement PC port80 debug register.
Date: Mon, 29 Jun 2009 18:36:43 +0300
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On 06/29/2009 06:26 PM, Jordan Justen wrote:
Avi,

Well, I am not sure if this it globally the case for PC motherboards, but in my experience, it has been read/write.

It's just some random memory that might not actually be grounded in reality.


At least for a system such as qemu, it make it difficult to use the port80 checkpoint of software without being able to read the last value written.

Why would software ever need to read it? You want a monitor command so the user can read it. I don't recall ever seeing a read of port 80 (I don't have any objections to that though).

--
error compiling committee.c: too many arguments to function





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