Run the planes between each pair of pads , for much better AC performance, so signals' ground return current doesn't have to veer away from the signal line and go clear around the end of the IC. There's plenty of room to get it between pads.

I'll set the GND plane clearance to 0.254mm so it goes ...

Hi again :)

I've been reeding the "Techniques for reliable high-speed digital circuits" sticky. There is a ton in there and I'm trying to grasp at least some of it. I also learn a lot by doing and getting feedback, so this is my current PCB setup. I split each layer out. Have I made any glaring ...

plasmo - it’s not to late. Is it better to just have a solid inner GND and VCC plane, making it 4 layers? It’ll cost more but that’s not an issue. I’d rather do it right, that why I’m here… to learn :)

sburrow - Thanks for that. This is auto-routed using EasyEDA, I've tried manually routing and that's just not for me at this point. For right now its just a 2 layer board and it will come in at about $13 for 5. I had looked at doing 4 layer (GND and VCC layers internal) but that jumps to $50. I ...

Makes sense

So this is the PCB, its 82mm x 218mm in size. Any issues? I'm thinking of ordering a few this weekend.

Jeff,

Thank you for the feedback! I'm going through each of them now.

With the change to the memory map logic, it would increase the speed of the #ROM single, but all other signals would still be slow. Currently the memory map takes (I think, if I'm reading the data sheets correctly, though I may ...

I've updated the schematic to use the logical gates rather than the chips, and I've switched the quad-and that was slow. I've reset my EasyEDA to be black on white from white on black. Hopefully this is getting into better shape. I've also been reading the primer that was listed, lots of great info ...

It seems there are missing connections in there. Or, is it in color?

Hi BigDumbDinosaur. Not sure how but the colors of some of the wire junctions went to red, I've verified on the EasyESD forum that the color is just a setting and doesn't mean anything. I've set the colors all to white ...

I've worked on sheet 1 based on the other thread I was pointed to. I've connected things directly rather than a bunch of netlists. But before I work on the other sheets, I'd like feedback on this one. Is this easier to follow? Are their ways to make it easier to understand or changes I should make ...

Hi, jzaun. Glad to hear about your project. But I guess you didn't see this recent thread : I'd be glad to help. But, honestly, I find it too laborious reading a schematic like this.
There are several fairly clear comments in the posts that follow. You should probably read them. Message is, you ...

I'm trying out my hand at creates a 6502 system. Its a 6502, 3 VIAs, RAM and ROM. I was wondering if anyone would mind taking a look at it and seeing if I made any mistakes before I get a PCB made. Or really have any comments at all. I'm still learning all this and the most I've done so far is a ...

@ GARTHWILSON,

I ran across your memory card in another thread after I started on this. I was planning on contacting you to see about the cost of one in the future, but I'm still looking to finish this up myself. I know 55ns is a lot slower than other chips out there but I'm not out for speed as ...

@BigDumbDinosaur and @BigEd,

Sorry about that I've updated the original post with the attachment to the circuit.

I'm looking to build a reusable memory card for my projects seeing as SRAM costs can add up. I've attached the circuit diagram and this is the link to the Upverter Project .

Are there any suggestions or issues or comments? I'm still very much learning so the more the better. Really the most I've ...