writeAttr
static void writeAttr(u_char, u_char, u_char);
writeAttr(i, AC[i], 0); /* pallete */
writeAttr(0x10, 0x0c, 0); /* text mode */
writeAttr(0x11, 0x00, 0); /* overscan color (border) */
writeAttr(0x12, 0x0f, 0); /* plane enable */
writeAttr(0x13, 0x08, 0); /* pixel panning */
writeAttr(0x14, 0x00, 1); /* color select; video on */