Re: Something else... 8501 GATE-IN

From: Mia Magnusson <mia_at_plea.se>
Date: Wed, 14 Mar 2018 20:22:31 +0100
Message-ID: <20180314202231.00004734@plea.se>
Den Wed, 14 Mar 2018 20:08:56 +0100 skrev Gerrit Heitsch
<gerrit@laosinh.s.bawue.de>:
> On 03/14/2018 07:47 PM, Hegedűs István wrote:
> > When display=off TED only uses the bus for the DRAM refresh. That
> > is why it switches back to single clock.
> > Although it seems to be a waste of time when using SRAMs I believe
> > we should not worry because of this. What could we win with those
> > extra 5 CPU cycles per scanline? Comparing to today's fast CPUs its
> > nothing.

Well, comparing with todays hardware there is no "need" to use old CBM
stuff at all. It's just a nice hobby. (Well, in theory for some people
it might be usable for learning 6502 assembler which still is a skill
that's requested by employers).

> You'd gain about 78000 cycles per second.
> 
> (5 per scan line, about 312 scan lines in total, 50 frames/sec)
> 
> And yes, I know it wouldn't be a lot, that's why I put a ':)' behind
> it.

I wasn't too serious either, it's just an interesting discussion
topic :)

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Received on 2018-03-14 22:35:36

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