i've written a small nes demo witch doesnt do much but should do alot more. My code is very simple and basic, but i cant seems to understand how to display something on the screen properly. I write to NT1 values but tiles never shows at the right place. For example, if i write to vram $2000, i see nothing but if i write to $2120, i see my stuff at the top of the screen. Here's a sample of my code:

start:
sei
cld

lda $2002
bpl start

lda #$00
sta $2005
sta $2005

lda #%00000000
sta $2000
lda #%00011110
sta $2001

lda #$20
sta $2006
lda #$00
sta $2006

lda #$01
sta $2007

Should this display my tiles at the top of the screen? I tested it out with fceultra but it doenst work.

thanks