Re: A83:STILL NEED HELP!

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Re: A83:STILL NEED HELP!


On Sun, 24 Oct 1999, Laurens Holst wrote:

> 
> 
> > Dines Justesen wrote:
> > > BTW Are you sure it is 53 T-states ?
> >
> > When I fiddled with this, a long time ago, I think I landed on about 30..
> > (I dont even have a ti83 anylonger)
> > The tricky thing is that the exact number changes, depending on
> temperature and
> > how good your batteries are.
> 
> Yep, indeed. Lotus doesn't function right when the batteries are new because
> it waits not long enough. By the way, does Lotus use the fastCopy routine???
> I think so because it requires ZGFXL which has no real other useful
> functions, but at the other hand, I had no problems with other games which
> used it... I remember Sqrxz having the same problems too (long ago...).
> 
> Oh, and I heard the 83+ required even more waiting (the processor is
> probably running a little faster or so).

Why not just keep reading the port until it's ready?  My wait routine
looks like this:

dWait:  in a,(10h)
        rla
        jr c,dWait
        ret

Is that inefficient?

> > Another trick to speed up the update, is to set the screen in
> "column-mode" and
> > write colums to it, instead of rows. If you do that, you will save quite a
> few
> > writes to the controller, and that is good, because writes to the
> controller is
> > _slow_.
> 
> the fastCopy routine of SOS (and ION) has the auto-increment mode set to
> columns. A shame that it doesn't increase the row when it reaches the end by
> the way.
> 
> 
> ~Grauw
> 
> 
> --
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> 
> 
> 

     Daniel Church      |  "War doesn't determine who is right-
     ___---^---___      |   only who is left."
    dchurch@mbhs.edu    |  -anonymous

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