org 200h

    ldx #0d  ; clear X register
    ldy #0d  ; clear Y register



NextX *
    lda 0e000h,x ; load E000+X into A register
    cmp #0d      ; compare A register to 0
    beq IncY     ; if A == 0, IncY
    inx          ; increment X
    cpx #0ffh    ; compare X to 255
    bne NextX    ; if X != 255, NextX
    sty 0275h    ; store Y register into 0275
    brk          ; end program

IncY *
    iny          ; increment Y
    inx          ; increment X
    jmp NextX    ; jump to NextX

    end