Ha! I'm visually oriented. I've always been fascinated by stereo spectrum analyzers, vu meters, scopes etc.With white LEDs like in your link, you could then make some type of colour overlay to indicate ram/rom/io and it then wouldn't be machine specific (other than the interface... for the 6502/6510 socket or cart port). I think it would be cool ;-) Steve From: Jim Brain <email@example.com> To: firstname.lastname@example.org Sent: Thursday, January 21, 2016 5:56 PM Subject: Re: Microcontroller "PEEKing" into C64 memory? Oh... Cute.¬† Hmmm.¬† I wired up 64 LEDs in a matrix before, and it was *NOT FUN*, so I would vote for some pre-made matrices.¬† I checked on a few on eBay, like this: http://www.ebay.com/itm/2x-LED-Display-5mm-Red-60mmx60mmx5mm-8x8-Dot-Matrix-Red-16Pin-GSE-/252038906856?hash=item3aaeb083e8:g:lvsAAOSw3ydVtdJO and I'd be happy to buy a few and make up the unit.¬† Sounds fun, if only marginally useful :-) On January 21, 2016 at 3:23 PM Steve Gray <email@example.com> wrote: Kinda a little off topic, but I thought it would be cool to build a little address monitor circuit. Take the top 8 address lines and split them into 4 HI and 4 LO groups, run both of those 4 lines into 4-to-16 decoders and use those to drive a 16x16 LED matrix. Each LED would represent one page of memory and you could watch the CPU access visually. You could use different coloured LEDs to represent RAM, ROM or I/O. Anyone heard of something like that??? ;-) Steve From: Jim Brain <firstname.lastname@example.org> To: email@example.com Sent: Thursday, January 21, 2016 1:56 PM Subject: Re: Microcontroller "PEEKing" into C64 memory? 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 -- Jim Brain firstname.lastname@example.org www.jbrain.com ¬† ¬† ¬† Message was sent through the cbm-hackers mailing list Message was sent through the cbm-hackers mailing list Message was sent through the cbm-hackers mailing listReceived on 2016-01-22 00:00:11
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