How do you do that Jonah? Here in a bit, you'll probably post one that's even smaller than the one previously posted.... Glen tutorial1.cjb.net In a message dated Thu, 13 Jan 2000 10:11:56 AM Eastern Standard Time, ComAsYuAre@aol.com writes: > > One byte smaller :-) > > ld hl,_alt_on_exec > ld a,(hl) > dec hl > push hl > ld de,40 > ld b,5 > getchecksum: > add hl,de > add a,(hl) > djnz getchecksum > pop hl > ld (hl),a