CR64
uni_wr(sc, VIACR, CR64, 0x00);
{VIACR, CR64, 0xFF, 0x00}, /* Secondary Display Starting Address */
{VIACR,CR64,0xFF,0x00}, /* Secondary Display Starting Address*/
{VIACR, CR64, 0xFF, 0x00}, /* Secondary Display Starting Address */
{VIACR, CR64, 0xFF, 0x00}, /* Secondary Display Starting Address */