"bug" copy on BASIC to screen from 0,212 to 256x255

Hello, 
is use this function :

10 screen 8:vdp(9)=2 : rem vdp(10)=vdp(10) and &H7f
20 set page 0,0:cls
30 bload "grp.sc8",s
40 call turbo on
50 for l=0 to 16383 : vpoke 212°256+l,vpeek(l):next L
60 line (0,0)-(256,211),200,bf
70 copy (0,212)-(32,212+32),0 to (100,100),0
80 call turbo on
90 vdp ( 7 ) = 255
100 goto 100

But can't see the graphic 32x32 in screen 8 (as screen 5-6-7!!) and this myster is not resolve 100% with CALL TURBO ON
Away, set CALL TURBO OFF, but away the problem of 32x32 HINT on screen!

Is use the source of command #D0 ? is ok o no ? Can't now the test, is wrong ? The graphics of screen 8 is two pages,
yes, but two block is hint 212 to 256, the size is 16384 bytes (16k !) extra for make copy 16x16 or 8x8 with 
CALL TURBO ON/OFF and use NestorBASIC with block RAM to switch and send to VRAM.

Because the new problem of 0,212 to 256,256 the COPY BASIC is not resolved, but the command #D0 is OK? 
Bye bye
DanySoft