Re: Microcontroller "PEEKing" into C64 memory?

Date: Thu, 21 Jan 2016 21:37:24 +0100
Message-ID: <7747817.5HuZ9Qgfgn@rakete>
On Thursday 21 January 2016, 21:33:26 wrote:
> > On 2016-01-21, at 21:18, wrote:
> >>>> If what you need is mirroring of a portion of C64 ram I have a FIFO
> >>>> based bus snooping design that could work, but I haven't had a chance
> >>>> to
> >>>> verify it.
> >>> 
> >>> I'd also be interested in a design, as I have a few ideas that need such
> >>> an integration.  I had been planning to implement 8 registers in a CPLD
> >>> with dual port access, but maybe there are better ways to do this...
> >> 
> >> How do CPU carts access the RAM? I mean how the external CPUs do it from
> >> the EXPANSION port.
> > 
> > using the DMA line (which halts the internal CPU and removes it from the
> > bus)
> Well, that's what I mean - if all what's needed is to peek a few bytes off
> some location from time to time? Or is it supposed to be completely
> invisible to the system?

thats why i asked what exactly the goal is... :)


Ihre Meinung weicht von meiner unrettbar ab, ich erkläre Ihnen hiermit den 
<Wolf Schneider>

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Received on 2016-01-21 21:02:52

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