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That brown stuff was adhesive to keep the capacitors in place so that they don't wobble during transport and break their leads. This is done on the big caps since they have a lot of mass. Fyi, I didn't know this either and went through the same thought process that it seems you are.. and when I...

+1 This shit is hard and setbacks are part of the process with something of this complexity. I admire your grit. And as ArcadeTechGW said, you clearly have the knowledge and skills. Hang in there :)

Ah, ok.. the comments are what made me think it was part of something larger. (There is a disassembly out there that I saw once, but now can't quickly find again.)

Do you have a link to the rest of the disassembled code?

All of this... and this might be obvious from the above, but you can also use the soldering iron and a heat gun/hot-air at the same time. I sometimes do that with a soldering iron, but when desoldering through hole parts, I'll turn the board sideways and use desoldering gun on one side and the...

Wait. what? I only have one, and it's grounded, but what's the issue if one isn't? And whatever the issue is, is it only an issue if they are on the same power circuit? What if one is floating/battery powered?

Oh, nice site! Thanks for the link. It look like the money quote is: "this check is run and the result is put at address 0x011F." It would be bit tricky to stop the game and check, but maybe with a fluke.

I remember seeing some dude named Dave on YouTube that disassembled the tempest rom and modified it. I don’t know if he linked to the source, but if so, you could use that as a check.. (ie burn some new roms do so thing basic early die to the check) The xmission dude is local to you. Does he...

Did you play it past the piracy check on Tempest? And again, this is great work.

Update: I decided to do the simple thing first and just use the color inputs I already had, rather than trying to breadboard up a dac and get it fed in via the pmod connections. I didn't think about it originally, but just having black in the rgb colors wasn't enough to hide the movement lines...

I thought about this some more, and still don't get it. It would make more sense to me if X was always inverting, i.e. it would invert when I put it on the Y input... but it doesn't. When I swap the inputs to the X/Y terminals, I only get a mirror in one configuration, not the other. In any...

Hit a significant milestone in that I'm actually displaying an image off a tempest pcb now. I expected it to look terrible, and it does :) But I was too excited about the possibility of seeing an actual display that I just hooked it up and went for it. Since the last update I've been working on...

This is all a lot of great input/feedback. Thanks!

So I'm trying to keep the component cost down so that the final product isn't stupid expensive like the previous Vector VGA. I believe I need to sample the colors at the same rate as X/Y or else things could get weird... maybe I'm wrong about that. But, if as someone mentioned earlier, 3 bits...

Ya. I'd have to run a line outside the standard connectors though, and I'd like this to be plug and play. (It also isn't clear to me at what the relationship between VGGO and the final output vectors are. I thought it was more about the hand off for the memory shared between the cpu and the...

Ok, so we were talking about different things. Interleaving would be alternating between chips using different busses, i.e. odd pixels on chip 1 and even pixels on chip 2. I was thinking less about overall bandwidth, and more about the setup and hold times on the addr/data lines. Alternating...

I'm kinda doing this just for fun and to learn, to be honest. My background is in software dev. About a year ago I barely knew what a pull up resistor was. But, if I can sell enough to recoup my costs and cover my hobby expenses, I'll be happy :) As for persistence / more memory bw... that's...

Oh hey! Are you the jrok from the jrok multi williams?! I making a long drive on Monday to pickup a multi-williams that has the (supposedly bad) Clay/ArcadeShop 20-in-1. Assuming that sale goes through, I'm going to be buying one of your boards to put in it!

About 5 months ago I started working on a Vector VGA replacement. I'm still many months away from being done, but I'm at a point where I have something to show. Inspired by DirtyMcDingus's "Let's design some POKEY replacements" thread, I decided to post progress so far. It's likely that as I get...

I just want to say that I'm loving this thread.