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I may have found an issue with the Atari 5200 version of the game. We played it on Friday on the ZeroPage Homebrew stream and after approx 9 minutes the screensaver kicked in and none of the buttons on the joystick were able to disable it.

Here's a link to just before the screensaver kicked in on the ZPH stream.

Excellent game and super fun but it switched to hard mode when the screensaver goes on!

Absolutely amazing game that retains the feel of NES Punch-Out! We had a really fun time on the stream with it, great job! We did find there was a lot of jitter and we also encountered a health bug in fight five that gave us a TON of health after I was supposed to be defeated.

- James

Heya MathanGames, just a heads up that we'll be playing Punch-Out 2600 on the ZeroPage Homebrew Twitch stream at 12PM PT/3PM ET today! Looking forward to it. It'll be posted on YouTube tomorrow.

You're very welcome! We'll be playing Xanthiom live on the ZeroPage Homebrew Twitch channel tomorrow, hope you can tune in!

Thank you for the update, the new build has eliminated a number of the scanline issues but still some remain along with the visible shaking. In the new version standing still seems to be mostly okay but walking (on most screens) and jumping still seems to invoke issues.

You should be able to see the issues in Stella if you're running the newest version of 6.7. Here is a post explaining the scanline issue better than I can.

Looks like an amazing game but there is very noticeable vertical jitter on Stella 6.7. The line count in the game alternates between 262 and 265 standing still and varies wildly up to 270 when jumping in the air. Line count issues can result in an unsteady picture in an emulator or on digital displays. On a CRT it may look fine but they are much more tolerant of issues like this.

If you run your game in Stella and press Alt-L you'll see the line count in the top left.