: SDC$
    10 0 DO _idle DROP LOOP
    10 0 DO  ( r )
        0x40 0 0 SDCMDR1  ( CMD0 )
        DUP 1 = IF LEAVE ELSE DROP THEN
    LOOP 1 = NOT IF _err THEN
    0x48 0 0x1aa ( CMD8 ) SDCMDR7 ( r arg1 arg2 )
    ( expected 1 0 0x1aa )
    0x1aa = ROT ( arg1 f r ) 1 = AND SWAP ( f&f arg1 )
    NOT ( 0 expected ) AND ( f&f&f ) NOT IF _err THEN
    BEGIN
        0x77 0 0 SDCMDR1  ( CMD55 )
        1 = NOT IF _err THEN
        0x69 0x4000 0 SDCMDR1  ( CMD41 )
        DUP 1 > IF _err THEN
    NOT UNTIL ; ( out of idle mode, success! )