> On 2016-01-21, at 19:56, Jim Brain <brain@jbrain.com> wrote: > > On 1/21/2016 12:32 PM, Per Olofsson wrote: >> On Thu, Jan 21, 2016, at 05:18 PM, Leif Bloomquist wrote: >>> 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? >> 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. -- SD! Message was sent through the cbm-hackers mailing listReceived on 2016-01-21 21:00:09
Archive generated by hypermail 2.2.0.