On Thursday 21 January 2016, 21:33:26 firstname.lastname@example.org wrote: > > On 2016-01-21, at 21:18, email@example.com 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... :) -- http://www.hitmen-console.org http://magicdisk.untergrund.net http://www.pokefinder.org http://ar.pokefinder.org Ihre Meinung weicht von meiner unrettbar ab, ich erkläre Ihnen hiermit den Krieg! <Wolf Schneider> Message was sent through the cbm-hackers mailing listReceived on 2016-01-21 21:02:52
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