SXP_PINS_DIFF
l = ISP_READ(isp, SXP_PINS_DIFF) & ISP1080_MODE_MASK;
l = ISP_READ(isp, SXP_PINS_DIFF|SXP_BANK1_SELECT);
if (ISP_READ(isp, SXP_PINS_DIFF) & SXP_PINS_DIFF_MODE) {