Re: Microcontroller "PEEKing" into C64 memory?

From: Jim Brain <>
Date: Thu, 21 Jan 2016 12:56:12 -0600
Message-ID: <>
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...


Jim Brain

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