Atari 2600

[KremlingKuthroat19]

Just wanna thank you guys for implementing my request for dedicated buttons for the B&W switch and the P1 and P2 difficulty switches. It works great! Also, adding stereo support was a nice feature I didn't expect.

[JWDog]

Hi Mister friends, I am having trouble with Deadly Duck being jittery, any ideas on the video settings to fix, or is anyone else having this issue with this game? Please help. Thx.

[kathleen]

Just tested and same issue here. Whatever the options (Vblank, De-com, Aspect etc) I have graphic problems (jumping up and down by few pixels and seems to be a bit faster than the original.
Edit : According to the videos I saw on the net the speed seems to be correct. It is a nervous game.

[JWDog]

The Mister Atari2600 Compatibility Sheet is awesome that NML32 created, however I am curious if there is a way to have like an .ini files or something to somehow setup the video, audio settings, etc (core settings) for individual roms? so it is a more automatic process... just curious

I know you can setup the core settings at start in the mister.ini thx

[gordonfish]

I was trying Jr. Pac-Man for Atari 2600 on my MiSTer and while other ROMs all seem to run fine (including regular Pac-Man), Jr. Pac-Man seems to have a strange issue, where pellets do not disappear when they are eaten. The same rom works fine in Stella and RetroArch on my computer; the pellets correctly vanish upon being consumed.

I have enclosed some screenshots (taken using the win+prints-creen keys on a keyboard - I can also take a photo of the monitor if requested.)

Has anyone else noticed this, and could anyone confirm this on their MiSTer?

Thanks,
-gfish


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Brief summary of my set up:

MiSTer_20201106
Atari2600_20201106.rbf
Jr. Pac-Man (USA).a26, 36c29ceee2c151b23a1ad7aa04bd529d, matching the one in the list at https://github.com/MiSTer-devel/Atari2600_MiSTer
Output: HDMI to 1080p TV that I otherwise use as a secondary monitor.
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[NML32]

@gordonfish Jr. Pacman is a SuperChip cart so just change the extension to .00s

[gordonfish]

@gordonfish Jr. Pacman is a SuperChip cart so just change the extension to .00s

Thanks, that did it! [1] I didn't realize the file extension would make that difference. (I guess I should have read the this part of the README.md a bit closer ) I've also never seen .00s in any Atari emulator before, nor was I too keen on what games use SuperChip. Thanks again for your help.

[1]

[venice]

I have an unofficial core that supports SNAC and works with my Atari Paddles.
...

Any chance that I can test this unofficial Atari core?

Cheers

[thorr]

Is it allowed to just share unreleased cores here? I don't want to get in trouble. I wish the SNAC code would just get included in the main build. A developer has the code but is probably super busy and hasn't gotten to including it yet.

[WolfgangBlack]

Is it allowed to just share unreleased cores here? I don't want to get in trouble. I wish the SNAC code would just get included in the main build. A developer has the code but is probably super busy and hasn't gotten to including it yet.

Post a link.
People share unreleased cores all the time.
The core owner is the one who controls it so if they are ok with that you're 100% good to go.

[thorr]

I got it through a MiSTer parts seller who knows the developer and was working with me to test and fix the SNAC issues once I got it. I didn't get it directly. I don't know if the author cares or not about sharing it. I could post the name of the author, but I don't want him/her to be hounded by y'all.

[venice]

I got it through a MiSTer parts seller who knows the developer and was working with me to test and fix the SNAC issues once I got it. I didn't get it directly. I don't know if the author cares or not about sharing it. I could post the name of the author, but I don't want him/her to be hounded by y'all.

Please, could you try to contact the author and ask him to share the core.

Thx

[FatSlob71]

All the Starpath Supercharger games do not work on this core !!!

[Zorro]

On my learning path into FPGA stuff, I stumbled over a course called "Learn Assembly Language by Making Games for the ATARI 2600" on Udemy. That is almost better than playing games on it. While probably most other students test their roms on soft emus like STELLA, I just turned on the MiSter, moved my file onto it via Samba connection and ... it's running. COOL
(Definitly much easier than a EEPROM burning process for a proper cartridge.)

[SegaSnatcher]

Now what this core really needs is an optional frame buffer toggle for the few games that have weird output. Most games can handle the low latency V_Sync=2 setting no problem, but a few games are very problematic and it would be nice if one could turn on a buffer on the fly specifically for those games.

[rhester72]

Now what this core really needs is an optional frame buffer toggle for the few games that have weird output. Most games can handle the low latency V_Sync=2 setting no problem, but a few games are very problematic and it would be nice if one could turn on a buffer on the fly specifically for those games.

Can you give examples?

[SegaSnatcher]

Now what this core really needs is an optional frame buffer toggle for the few games that have weird output. Most games can handle the low latency V_Sync=2 setting no problem, but a few games are very problematic and it would be nice if one could turn on a buffer on the fly specifically for those games.

Can you give examples?

Air Raid and Jr. Pacman are two examples of games that loses sync on my PC monitor.

Also, I get a blank screen from Popeye and Qbert's Cubes.

Edit: Seems like Popeye and Qbert's Cubes are also broken with V_Sync=0

[rhester72]

@SegaSnatcher are you on a CRT or something? On HDMI, Popeye and Qbert's Cubes are fine with v_sync=2 (at least on my TV)

[SegaSnatcher]

@SegaSnatcher are you on a CRT or something? On HDMI, Popeye and Qbert's Cubes are fine with v_sync=2 (at least on my TV)

I'm using HDMI out and those games crash on me. Maybe I have to add the mapper extension?

[rhester72]

OK, next question - have you set VBlank to Regenerate? (If not, try it.)

[SegaSnatcher]

OK, next question - have you set VBlank to Regenerate? (If not, try it.)

I think I found the issue, I didn't realize some roms needed mapper extensions at the end of file.

[skooter]

Now what this core really needs is an optional frame buffer toggle for the few games that have weird output. Most games can handle the low latency V_Sync=2 setting no problem, but a few games are very problematic and it would be nice if one could turn on a buffer on the fly specifically for those games.

Can you give examples?

Condor Attack
Deadly Duck
Front Line
Turmoil

This is just a small list that came to mind now, there are many others games that won't work with v_sync=2 because they keep changing the number of lines (refresh rate) on-the-fly. VBlank Regeneration won't help on these ones.

[rhester72]

I see your point there - Condor Attack looks like Atlantis used to before vblank generation. Bummer.