MK_MESSAGE_SCB
ahd_outw(ahd, MK_MESSAGE_SCB, SCB_LIST_NULL);
scbid = ahd_inw(ahd, MK_MESSAGE_SCB);
tid_head = ahd_inw(ahd, MK_MESSAGE_SCB);
ahd_mk_message_scb_print(ahd_inw(ahd, MK_MESSAGE_SCB), &cur_col, 50);