[stella] X or Y ?

[happy_dude@xxxxxxxxxxxxx]

I had a lot of code like this in Master Mind deluxe

   ldy #4
load_1
    lda r1peg1,y
    sta Dpeg1,y
    dey
    bpl load_1

I changed it all to this and saved a lot of rom

   ldx #4
load_1
    lda r1peg1,x
    sta Dpeg1,x
    dex
    bpl load_1

Why? 
I'v read through the 6502 documentation and can't see any rason why.
----------------------------------------------------------------------------------------------
Archives (includes files) at http://www.biglist.com/lists/stella/archives/
Unsub & more at http://www.biglist.com/lists/stella/