[Qemu-devel] Re: [PATCH] debugcon: support for debugging consoles (e.g.Bochs port 0xe9)

[Sebastian Herbszt]

H. Peter Anvin wrote:
> Add generic support for debugging consoles (simple I/O ports which
> when written to cause debugging output to be written to a target.)
> The current implementation matches Bochs' port 0xe9, allowing the same
> debugging code to be used for both Bochs and Qemu.

Your implementation seems to miss the read part, unless you don't want to be
compatible with Bochs. user.dbk says:
"Reading from port 0xE9 will will return 0xe9 to let you know if the feature is 
available."

- Sebastian