Subject: Re: [stella] An exercise in minimalism... From: "Andrew Davie" <adavie@xxxxxxxxxxxxxxxxx> Date: Thu, 2 Sep 1999 14:24:48 +1000 |
> > LDY #$FF ;2 > > LDX #0 ;2 > >B1 STX 0,Y ;2 > > DEY ;1 > > BNE B1 ;2 > > You could change the first two lines of this to LDX #0 and TXY to save one > byte. It'll still work. Yes it will, but not with exactly the same result; the original doesn't clear address 0 (it clears 255 bytes of zero page). Your method will clear address 0, clearing all of zero page, which is more correct anyway :) I don't have the original email handy, but I hope somewhere there the stack pointer was setup!! I wrote an efficient startup section some time back, on stella - time to look it up! Cheers A -- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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