/*›               CURSOR.C›   ›   ›   Copyright 1990 by MAX Systems and›   Marty Albert. May be freely used›   and distributed by all so long as›   credit is given.›   ›   ›   ›   ›   This pair of routines do nothing›   more than turn the cursor on and›   off. Calling the routines is›   simple:›   ›             cursor_on() ›                  or›             cursor_off()›   ›   ›*/›››char * crsinh=0x02f0;›››cursor_on()›  $(›    *crsinh=0;›return;›  $)›››cursor_off()›  $(›    *crsinh=1;›return;›  $)››