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-rw-r--r--docs/specs/standard-vga.txt9
1 files changed, 9 insertions, 0 deletions
diff --git a/docs/specs/standard-vga.txt b/docs/specs/standard-vga.txt
index f82773e677..19d2a74509 100644
--- a/docs/specs/standard-vga.txt
+++ b/docs/specs/standard-vga.txt
@@ -70,3 +70,12 @@ Likewise applies to the pci variant only for obvious reasons.
0500 - 0515 : bochs dispi interface registers, mapped flat
without index/data ports. Use (index << 1)
as offset for (16bit) register access.
+
+0600 - 0607 : qemu extended registers. qemu 2.2+ only.
+ The pci revision is 2 (or greater) when
+ these registers are present. The registers
+ are 32bit.
+ 0600 : qemu extended register region size, in bytes.
+ 0604 : framebuffer endianness register.
+ - 0xbebebebe indicates big endian.
+ - 0x1e1e1e1e indicates little endian.