( -- n )
: _idle 0xff _sdcSR ;
( _sdcSR 0xff until the response is something else than 0xff
for a maximum of 20 times. Returns 0xff if no response. )
: _wait
0 ( cnt )
BEGIN
_idle
DUP 0xff = IF DROP ELSE NIP EXIT THEN
1+
DUP 20 = UNTIL
DROP 0xff
;
1 12 LOADR+
