[Qemu-devel] Re: [PATCH] pc: move port 92 stuff back to pc.c from pckbd.c

[Stefan Hajnoczi]

On Tue, Dec 28, 2010 at 9:45 PM, Peter Lieven <address@hidden> wrote:
> What happens if I set the A20 Gate via the keyboard controller and then read 
> its status via ioport 0x92? This doesn't work, or does it?
> What was wrong reading the A20 via
>
> int ioport_get_a20(void)
> {
>    return ((first_cpu->a20_mask >> 20) & 1);
> }
>
> every time ioport 0x92 or the keyobard outport is read?

I wonder the same thing.

Also, stashing the uint8_t output value away is not migration-friendly
at the moment?

Stefan