Hi all, I have an idea for a project that would require an external microcontroller to be able to "peek" into parts of the C64 Memory. It wouldn't matter where. I/O1 and I/O2 might be easiest, but some unused space like $02A7-$02FF could also work and not interfere with external devices. Only would need 8 bytes or so. What would be the easiest way to go about this? I'm not an electrical guy at all, but my initial concept would be a dual-port SRAM along with a decoder (74LS138, etc) that signals when the particular address range is selected (as well as on Write). Then have the data lines and a few of the address lines connected to the SRAM that gets written to when that triggers. From there the microcontroller can read the SRAM from the other port and do its thing. Would this be easiest, or are there other better ways? There's also this, a cool project (but total overkill), proves it can be done: http://hackaday.com/2014/12/26/dual-porting-a-c64-flash-cart/ (Plan B would be to to have a UART and go serially through the User Port, but then special software would be needed on the 64, more involved than just a POKE.) Thanks -Leif -- Leif Bloomquist | firstname.lastname@example.org | +1 416-737-2328 | Check out my blog! http://www.jammingsignal.com "Every choice, no matter how small, begins a new story." - xkcd Message was sent through the cbm-hackers mailing listReceived on 2016-01-21 17:00:11
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