Applied both mainline PCem commits;

Fixed the RTL8029AS again (one of my "fixes" broke it);
RTL8029AS PCI register 4 is now written to;
Added incomplete (and currently commented out) emulation of the AWE64 PCI;
Replaced sector-based floppy emulation with more accurate code.

src/disc_img.c

@@ -726,7 +726,12 @@ void img_seek(int drive, int track)
                	        	                &img[drive].track_data[side][sector * img[drive].sector_size]);
 		}
 	}
+	for (side = img[drive].sides - 1; side >= 0; side--)
+	{
+		disc_sector_prepare_track_layout(drive, side);
+	}
 }
+
 void img_writeback(int drive, int track)
 {
         if (!img[drive].f)