How to designs NES ON FPAG

kyuusaku · Post by **kyuusaku** » Wed Oct 08, 2008 1:37 am

Bump. Working on this again, lots of trouble with the PPU! $2006 is far more difficult than I anticipated since it's documented operation doesn't fit hardware very well! The logic is so convoluted, it would seem we're missing some key pieces of $2002,2005,2006's operation.

tcdev · Post by **tcdev** » Tue Nov 25, 2008 1:58 am

Hi guys,

I too have been playing around with a FPGA NES.

I had some success with my first attempt, being able to run Tennis, Wrecking Crew and SMB - the latter with graphical glitches.
http://members.iinet.net.au/~msmcdoug/p ... eckcrw.jpg

I made no attempt to model the PPU accurately - rather I used my existing tilemap/sprite subsystem and added enough logic to make it work "like" a PPU. I also used a stock 6502 core for the CPU...

Here's my latest FPGA project page...
http://pacedev.net/

The NES isn't up-to-date. In my 2nd incarnation I am attempting to model the PPU more accurately. I've got the tilemap going but the sprites are still WIP.

Regards,

maxzhou88 · Post by **maxzhou88** » Thu Jan 01, 2009 12:01 pm

Somebody( Kevin Horton ) have been already done, look at here:http://tripoint.org/kevtris/Projects/console/index.html

tcdev · Post by **tcdev** » Thu Jan 01, 2009 3:50 pm

That project has been around for quite some time, but the author has, AFAIK, no intention of releasing the source into the public domain.

Jeroen · Post by **Jeroen** » Thu Jan 01, 2009 7:52 pm

"The author" Kevin Horton actually hangs around these forums! And in the irc channel #nesdev. But ya he wont release source......most people wouldnt be able to build it anyway. *goes back to Kevtris shrine*

Hojo_Norem · Post by **Hojo_Norem** » Fri Jan 02, 2009 12:14 pm

Jeroen wrote:But ya he wont release source......most people wouldn't be able to build it anyway.

Hmm, I don't know about that. It took me a while but I have built a fully functional Minimig. Here's the proof.

(offtopic)
I did have a TV repairman friend of mine to check it over and touch it up a little (mainly the FPGA) but I guess I could have done it 100% myself with different tools. (I have heard some people have had decent results with solder paste and a heatgun).
(/offtopic)

Jeroen · Post by **Jeroen** » Sat Jan 03, 2009 7:40 am

Kevin told me that fpga is not hand solderable (without the right tools anyway.) Soooo if you have the tools you "could" do it. Stil takes skills though. Note I said most people.

nesdev.org

How to designs NES ON FPAG

NES FPGA