vga: improve documentation

Add links to chipset docs and FreeVGA site.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

diff --git a/hw/vga.c b/hw/vga.c
index 758bd927967fae78c0a459bd01c0ac4a1fea8a94..d87c4f9f5bb0c215b0ce9f194872aeef28b4d6a1 100644 (file)
--- a/hw/vga.c
+++ b/hw/vga.c
@@ -37,6 +37,18 @@
 
 //#define DEBUG_BOCHS_VBE
 
+/*
+ * Video Graphics Array (VGA)
+ *
+ * Chipset docs for original IBM VGA:
+ * http://www.mcamafia.de/pdf/ibm_vgaxga_trm2.pdf
+ *
+ * FreeVGA site:
+ * http://www.osdever.net/FreeVGA/home.htm
+ *
+ * Standard VGA features and Bochs VBE extensions are implemented.
+ */
+
 /* force some bits to zero */
 const uint8_t sr_mask[8] = {
     0x03,