[SeaBIOS] [RFC PATCH 1/2] serial console, output

Paolo Bonzini pbonzini at redhat.com
Mon Jul 4 17:45:56 CEST 2016

On 04/07/2016 17:26, Kevin O'Connor wrote:
> > 4k, we need both character and attribute.  But, yes, if we can allocate
> > that somewhere in real mode address space without running into memory
> > pressure this might be the best option.
> Unfortunately, the screen can be larger than 80x25.

It can with SVGA BIOS, but Gerd here only supports mode 3, doesn't he?


> If a large buffer is desired, it's also possible to malloc_high() it
> and then use either: call32() to access it, or int1587 to read/write
> it (see ramdisk.c:ramdisk_copy() as an example).  Either way it seems
> ugly.
> At one point I looked through the sgabios code and was able to
> understand how it did caching.  I'll take another look and see if I
> can describe it.

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