Space Invaders Arcade

[+sramirez2008]

2 hours ago, SpiceWare said:

 

This artifact?

 

 

 

 

 

 

 

 

I apologize, I thought we were looking for pixels within the game (square grid) itself. I can see this artifact, but only on my Harmony and Harmony Encore. The ROM displays differently (please see below) via the UnoCart. 

 

Harmony/Harmony Encore 

 

UnoCart

[Thomas Jentzsch]

No, you assumed right the first time. We are looking for the pixel in the game square.

[+sramirez2008]

7 minutes ago, Thomas Jentzsch said:

No, you assumed right the first time. We are looking for the pixel in the game square.

Okay, then I stand by my original statement.  The pixels in the game square were fine. Sorry for the fuzzy pics.

[+SpiceWare]

1 hour ago, Thomas Jentzsch said:

No, you assumed right the first time. We are looking for the pixel in the game square.

 

It shows up on the title screen too, in the A and the H.

[Thomas Jentzsch]

15 minutes ago, SpiceWare said:

It shows up on the title screen too, in the A and the H.

Yes, but in the game screen it is much more obvious.

[alex_79]

late PAL Jr. console (1991):

and with  the test rom by Spiceware posted in this thread:
https://atariage.com/forums/topic/298427-weirdest-bug-you-ever-had/?do=findComment&comment=4394131

 

 

Back to "Space Invaders"...
I tested all 3 versions on that same console with Harmony cart (doubled up v. 0.1 and 0.2 to 8k and added extension "F8S").

They work, but what's up with those stripes (playfield, I guess) on the background? They don't appear in Stella. Moreover, shots are gray instead of the sprite color (green on Stella, blue on my hardware because of PAL colors).

Those stripes are visible also in alfredtdk's screenshots posted earlier.

The score starts on the very first visible line on my TV, but it's fully visible.

 

 

[Thomas Jentzsch]

17 minutes ago, alex_79 said:

They work, but what's up with those stripes (playfield, I guess) on the background?

Right difficulty switch, for debugging reasons.  

 

I started this project with z26, which didn't have the excellent debugger of Stella.

[alex_79]

I played a bit. It's looking great so far

 

Sometimes the last invader gets stuck (but you can shoot him and continue playing).

savestates.zip

 

[Thomas Jentzsch]

Yup, there was a bug when the last invader wasn't one from the top row.

[Thomas Jentzsch]

BTW: Can you post a few more Screenshots from the game screen with different patterns? 

 

[alex_79]

[Thomas Jentzsch]

Thanks. The line is always brighter than the rest.

[alex_79]

I just noticed that you can disable the flickering with the left difficulty switch...

[Thomas Jentzsch]

Didn't know that too. But the line is still there...

[+FujiSkunk]

Just have to chime in and say this looks awesome!

[spspspsp]

On 6/19/2020 at 3:20 PM, Thomas Jentzsch said:

Pixel 79 (the one left of the middle of the screen) sticks out. It has a different color. 

 

If you can see it (partially, complete, on/off...), please take a picture or video (and maybe add a brief description) of the game screen where the color artifact should be most obvious. Also please tell us your hardware setup. Thanks!

 

BTW: If your system has no color artifact, we don't need a picture.  

 

I see the artifact on my 2800 (NTSC, of course). This system has rev. D of the UAV mod installed. It also shows up during gameplay.