Re: A86: Re: LCD stuff

To: assembly-86@lists.ticalc.org
Subject: Re: A86: Re: LCD stuff
From: Cassady Roop <croop@oregontrail.net>
Date: Thu, 18 Nov 1999 22:31:45 -0800
References: <0.78bf7535.25664975@aol.com>
Reply-To: assembly-86@lists.ticalc.org


Gee, don't hold your breath for that to happen!

Cassady Roop

TGaArdvark@aol.com wrote:
> 
> > By the way, how much power does the processor consume when the calc is
> > 'off'?  I looked up the halt instruction in the z80 data book to try and
> > resolve an old dispute with a friend of mine over whether it is ever
> > truly off or not (off as in no power usage).  I found that the halt
> > instruction waits for an interrupt, during which time it runs a
> > continual cycle of NOP instructions internally, to maintain memory
> > refresh logic for dynamic memory chips.  I don't think the 86 uses
> > dynamic memory (or maybe it does?), but the z80 still runs during a
> > halt, so therefore it must consume power, so therefore the calculator is
> > never truly turned off except when the batteries have been removed.  How
> > much power does it take?  If you left it off for a long time, would your
> > batts run down?
> 
> This was documented on ticalc.org when it first opened.  It's
> probably still there, hidden in some directory.  The TI-85
> consumes 8 microamps or something like that when off.
> It will theoretically drain your AAA batteries in 350 years.

References:

Re: A86: Re: LCD stuff

From: TGaArdvark@aol.com