X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fdevices%2Fvga_regs.h;h=fd4a0686e179ea5841cfe967668887740a836fe0;hb=f2474c56a820b000ed444cb31c487d67aaf212c5;hp=c62d29f9cf62184cc770738893197ff6d0e2740d;hpb=6cbcb10551773e01f0f5599a2d20fe63cee1fcc3;p=palacios.git

diff --git a/palacios/src/devices/vga_regs.h b/palacios/src/devices/vga_regs.h
index c62d29f..fd4a068 100644
--- a/palacios/src/devices/vga_regs.h
+++ b/palacios/src/devices/vga_regs.h
@@ -199,6 +199,7 @@ struct vga_mem_mode_reg {
 	    uint8_t extended_memory:1; // 1=>256K RAM, 0=>64K
 	    uint8_t odd_even:1;
                 // 0 => even addresses go to BOTH banks 0 and 2, odd 1 and 3
+	        //      or flip between 0/1 for CGA compat
                 // 1 => address bank sequentially, map mask selects bank
 	    uint8_t chain4:1;  
                 // 0 => map mask register used to select bank
@@ -630,10 +631,11 @@ page 2-88).
 	    // 0 = read gets bits from selected map
 	    uint8_t odd_even:1;
 	    // 1 = odd/even addressing as in CGMA
+	    // 0 = NOT odd/even
+	    // notice that this is the OPPOSITE of the bit in the sequencer!
 	    uint8_t shift_reg_mode:1;
 	    // 1 = shift regs get odd bits from odd maps and even/even
-	    uint8_t c256:1;         
-	    // 1 = 256 color mode
+	    uint8_t c256:1;         	    // 1 = 256 color mode
 	    // 0 = shift_reg_mode controls shift regs
 	    uint8_t reserved2:1; 
 	} __attribute__((packed));
@@ -713,7 +715,7 @@ struct vga_attribute_controller_address_reg {
 	uint8_t val;
 	struct {
 	    uint8_t index:5;    // actual address
-	    uint8_t internal_palette_address_srouce:1; 
+	    uint8_t internal_palette_address_source:1; 
 	    // 0 => use the internal color palette (load the regs)
 	    // 1 => use the external color palette
 	    uint8_t reserved:2; 
@@ -858,4 +860,26 @@ 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 {
+	    uint8_t fore:3;   //foreground color
+	    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
+	    uint8_t back:3;   //background color
+	    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