6502.org

BigEd suggested i show a my 68k sbc, since it kinda works at 8-10MHz, which is a success for this kind of technique. There is some crosstalk present, but it seems to work.
If somebody is interested, i could shoot some pictures of the signals.
http://www.mediafire.com/?g8i15qbrfxqww5j(Usually i would use Megaupload for this kind of stuff, but...)

Edit: I didn't want to start a new topic for this, so i just posted here.

You're welcome. You must show us what you end up putting on it.

One plan would be a variation of the Elm Chan CPLD to VGA but 65C02 based to go to my board as an arcade graphics.

when all is said and done, you have a nice clean design there, period.

I usually run my connections on top with this type of board. It usually comes out fairly neat. Here are three examples.


This was for my Tiny Basic project. This one runs EhBASIC, Tiny Basic and UK101 Basic. When I get the chance I'm going to try SYM-1 Basic. This is a stepper motor driver and display for the Tiny Basic board above and a few older designs.

I thought I would post a couple of links to help understand the gerber RS-274X standard and view PC-board files conforming to the standard:

Gerber RS-274X viewers, translators, and rasterizers: http://www.artwork.com/gerber/
What's all this about RS274X Anyway? http://www.artwork.com/gerber/274x/rs274x.htm (includes a link to download the actual 274X spec., which is probably best. I have the spec. printed out, and it's relatively easy to understand.)

The older gerber format was 274D. The aperture file was separate from the gerber data files, so if you had data files that didn't share the same aperture file, your line and pad sizes could get all messed up if the CAM operator didn't use the right one. Another difficulty with 274D was merge files, where it took multiple files to make a complex layer with fills and cuts and other things that are beyond just pads and traces. When our purchasing agent was trying to milk every penny out of PC board houses for quotes, I often ended up having to spend days trying to get non-English-speaking CAM operators to understand what I wanted, even though it was very clear in the README.TXT file for native English speakers (and they said so). I'm still using my old mid-1990's CAD because of its flexibility; but it doesn't do 274X directly. After I learned 274X, it became a pretty easy proposition to go into my programmer's text editor and convert the CAD's 274D output to 274X, and it saves me a lot of time because 274X leaves a lot less room for CAM operators to introduce human error, and I don't have to write complex instructions for how to handle the merge files. 274X results in only one file per layer.

I couldn't think of any other good recent topics to add this to; so if you think of one, or want to start one, do link to this, or just quote it there. The URL of this post is viewtopic.php?p=18156#18156