VGA Updates

[palacios.git] / palacios / src / devices / vga_regs.h

diff --git a/palacios/src/devices/vga_regs.h b/palacios/src/devices/vga_regs.h
index c62d29f..c9858db 100644 (file)
--- a/palacios/src/devices/vga_regs.h
+++ b/palacios/src/devices/vga_regs.h
@@ -858,4 +858,40 @@ typedef uint8_t vga_dac_pixel_mask_reg;
 // This is red, green, blue
 typedef uint32_t vga_palette_reg; 
 
+
+//
+//  What attribute bytes mean in text mode
+//
+struct vga_attribute_byte {
+    union {
+       uint8_t val;
+       struct {
+           union {
+               uint8_t fore:3;
+               struct { 
+                   uint8_t fore_red:1;
+                   uint8_t fore_green:1;
+                   uint8_t fore_blue:1;
+               } __attribute__((packed));
+           } __attribute__((packed));
+           uint8_t foreground_intensity_or_font_select:1; // depends on char map select reg
+           // character map selection is effected
+           // when memory_mode.extended meomory=1
+           // and the two character map enteries on character_map_select are 
+           // different
+           union {
+               uint8_t back:3;
+               struct { 
+                   uint8_t back_red:1;
+                   uint8_t back_green:1;
+                   uint8_t back_blue:1;
+               } __attribute__((packed));
+           } __attribute__((packed));
+           uint8_t blinking_or_bg_intensity:1; 
+           // attribute mode control.enableblink = 1 => blink
+           // =0 => intensity (16 colors of bg)
+       } __attribute__((packed));
+    } __attribute__((packed));
+} __attribute__((packed));
+
 #endif