diff options
| author | Gerd Hoffmann <kraxel@redhat.com> | 2012-11-12 14:29:47 +0100 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2014-04-28 11:03:32 +0200 |
| commit | 63e3e24db2e9eef8cf7e5f611c0a2e06dd9207c9 (patch) | |
| tree | a420a9a3cd1ceaf3df71970bc92fd4056094d567 /docs | |
| parent | e2bbfc8ee2aa82519da7de281305c3bea5431cf1 (diff) | |
vga: add secondary stdvga variant
Add a standard vga variant which doesn't occupy any legacy
resources and thus can easily be used as secondary (or legacy-free)
graphics adapter. Programming must be done using the MMIO bar.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/specs/standard-vga.txt | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/docs/specs/standard-vga.txt b/docs/specs/standard-vga.txt index 8a4c1e93cd..f82773e677 100644 --- a/docs/specs/standard-vga.txt +++ b/docs/specs/standard-vga.txt @@ -5,9 +5,10 @@ QEMU Standard VGA Exists in two variants, for isa and pci. command line switches: - -vga std [ picks isa for -M isapc, otherwise pci ] - -device VGA [ pci variant ] - -device isa-vga [ isa variant ] + -vga std [ picks isa for -M isapc, otherwise pci ] + -device VGA [ pci variant ] + -device isa-vga [ isa variant ] + -device secondary-vga [ legacy-free pci variant ] PCI spec @@ -31,9 +32,15 @@ PCI ROM Region: Holds the vgabios (qemu 0.14+). +The legacy-free variant has no ROM and has PCI_CLASS_DISPLAY_OTHER +instead of PCI_CLASS_DISPLAY_VGA. + + IO ports used ------------- +Doesn't apply to the legacy-free pci variant, use the MMIO bar instead. + 03c0 - 03df : standard vga ports 01ce : bochs vbe interface index port 01cf : bochs vbe interface data port (x86 only) |