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There is no noticeable lag with my set up. Ive played several different games and and haven't noticed any lag yet. I'm using a fairly expensive upscaler tho, around $180 new. I bought a used one on Ebay for $50. This is the the one I used, Startech VID2HDCON

I haven't had any heat issues so far. I purchased a 2 amp 7805 voltage regulator but have held off on installing it. I wanted to see if there was anymore heat generated from the HDMI modded 7800 compared to just an S-video modded unit. After playing both 7800's for several weeks now, there hasn't been any noticeable heat difference between the two machines. I still plan on upgrading the voltage regulator but I just wanted to see what would happen if I left it alone. I actually left my HDMI modded 7800 on for 3 days so I wouldn't lose my place on Bently bear. It was hot but not any more then just playing it for a few hours. I have really enjoyed my HDMI machine, its simple to connect, just one HDMI cord and the video is amazing. I should mention, Im not using any equipment to measure heat. I have the screws out so I can remove the top and touch the heatsink.

Thank you, This is very helpful. I'm working on another addition/mod to my hdmi 7800

Thank you both for the compliment PM me an address and I'll send you out a set of the jacks

I never would of thought to check dig dug, I just assumed the green level was normal. It looks much better under commando mode. Switching the converter between 480,720 or 1080 does not affect aspect ratio. It does however effect the screen. I didn't even notice it right away. in 720 or 1080 i get about a 1/2" blur across the bottom of the screen while scrolling up in Commando. When switched to 480 that goes away completely. The overall picture in 1080 or 720 is slightly better tho. Advanced settings on my TV has a few dozen setting you can mess with. I tried changing individual color settings for tint, color and brightness among several other things but to be honest the only thing that really changed the picture much was just reducing the main tint.

I've never played it before so this is as high as I could get. Hope this helps.

The amperage on the power supply is 1 amp. I can't find anywhere that says what it actually draws. Is it possible to double up two 7805's?

I don't have tower toppler but I'll put it on my Mateo cart and post some pics.

Sorry I miss understood when you said power supply. I was concerned about actual power supply being under amped to handle both. I'll look into changing that out. I'd rather be safe then sorry. Any suggestions on what to upgrade it to? Thanks for your help, it was your suggesting I use the S-Video to HDMI instead of the composite that got me started tinkering with this.

It might get me divorced but I'll bid $120

I have two custom settings available on my TV. So I adjusted the settings in one of them for Commando. Now when I want to play Commando I can just switch over to Commando mode.

Played the games you mentioned above with no issues. They look great and play just fine. As I mentioned in my original post I was concerned and prepared to change out the power supply. After testing it for several hours playing games and just leaving it turned on for awhile it seems to be fine. No heat issues beyond normal on the game or the power supply. As you mentioned above some power supplies are 500ma, so the system must draw less then 500ma. I think the 1amp power supply is going to handle the extra draw of the converter just fine. The only issue I need to fix right now is the converter takes about 10 seconds to connect after I turn on the 7800, the screen is black during that time. I miss the atari start up screen. I'm going to move the 5v wire from the converter over so it powers up as soon as the 7800 is plugged in. That way when I power on the machine it will start up normally.

Like I mention earlier, the blur around commando is from the camera and not on the TV screen. Commando is just about the only game I notice a difference and to be honest I'll take the crisper picture even if it is green. It's still a great picture, he's just running through a grassy field. Bently Bear himself is also slightly green instead of brown don't notice any other color changes in the Bently game. The blues are bright and sharp its a really colorful game with the UAV board. The pics I put up are taken on my plasma TV, I get more of the browns on my LCD TV. I'm not smart enough to know how it works, I'm just dumb enough to take perfectly good electronics apart and see what I can figure out. I used Bryan's UAV board and directly soldered it to a Startech VID2HDCON S-Video to HDMI converter. I had to remove parts from both the converter and the Atari. Also had to cut down the converter board a little.

Thank you, the work was mostly just trying to figure out where it would fit and what would have to be removed. I had to dremel away about an 1/8" of the hdmi board so it would fit tighter to the cartridge slot on the right. I took some pics but I'll take some more after dark. it was too bright in the room and there was too much glare on the TV. The blur you see is from the camera. colors are too bright for my iPhone. There is no ghosting at all, its just the camera, the picture is very sharp and the colors are bright.