X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fdevices%2Fvga_regs.h;h=fd4a0686e179ea5841cfe967668887740a836fe0;hb=a5d2c00cc461b4a60a1360a2a0bba55cef467bab;hp=08b65f29ca1721b584f11526efa1ef4ff5fa56af;hpb=56b88e037fb1b9e313e642682a08267b866e70bb;p=palacios.git

diff --git a/palacios/src/devices/vga_regs.h b/palacios/src/devices/vga_regs.h
index 08b65f2..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
@@ -630,6 +631,8 @@ 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