Assembler problem

ORG 100h      ; this directive required for a simple 1 segment .com program. 
MOV AX, 0B800h   ; set AX to hexadecimal value of B800h. 
MOV DS, AX     ; copy value of AX to DS.
XOR CX,CX  
MOV Cl, 255     ; copy to the counter the higest ASCII value
woot:        ; the 
MOV DL, CL     ; set DL to ASCII code of CX. 
MOV DH, CL     ; set DH to binary value. 
MOV BX, CX     ; set BX to CX. 
MOV [BX], DX    ; copy contents of CX to memory at B800:255  
LOOP woot      ; repeats the drawing of ASCII CX in spot CX in color CX
RET         ; returns to operating system. 

why does it print only half of the codes?

EDIT:

nvm solved