1128 0x007d 0x007d 0x0075 0x0075
      60       61    62
sum_r is now frozen to 1128 to know if the sdram has been read correctly

reading the first 63 sdram

:1000000000A300A0009B009B009D00AA00A8008800 0-7
:10001000005E0069006B006C006A00750078007D6E 8-15
:1000200000820082008300830084008500860085B2 16-23
:10003000008400860085008300850083008700839C 24-31
:10004000008400840083008000820080007B006EBA 32-39
:100050000076009600A10096009A009A0099009CF4 40-47
:10006000009C009D00AF00D800C800630076007BB4 48-55
:10007000007B007B007D007A007D007D007500958F  <-- 007d 007d 0075
:10008000009D009E009D009800A300A900A600828C  matches the values
sent back to PC.