MiSTer FPGA Forum

Posted: **Thu Oct 29, 2020 8:22 pm**

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.

Posted: **Fri Oct 30, 2020 4:07 am**

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.

Posted: **Fri Oct 30, 2020 12:57 pm**

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.

Posted: **Fri Oct 30, 2020 4:16 pm**

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

Posted: **Thu Nov 19, 2020 1:19 am**

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

------------------------------------------------------------------------------------------
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.
------------------------------------------------------------------------------------------

Posted: **Thu Nov 19, 2020 2:27 am**

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

Posted: **Thu Nov 19, 2020 5:27 am**

NML32 wrote: ↑Thu Nov 19, 2020 2:27 am @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]

Posted: **Fri Nov 27, 2020 4:35 pm**

thorr wrote: ↑Mon Aug 24, 2020 10:29 pm 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

Posted: **Sat Nov 28, 2020 8:58 am**

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.

Posted: **Sun Nov 29, 2020 12:42 am**

thorr wrote: ↑Sat Nov 28, 2020 8:58 am 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.

Posted: **Mon Nov 30, 2020 4:50 am**

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.

Posted: **Mon Nov 30, 2020 12:35 pm**

thorr wrote: ↑Mon Nov 30, 2020 4:50 am 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

Posted: **Tue Dec 01, 2020 8:00 am**

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

Posted: **Fri Jan 08, 2021 3:46 pm**

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.)

Posted: **Fri Jan 08, 2021 3:56 pm**

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.

Posted: **Fri Jan 08, 2021 4:00 pm**

SegaSnatcher wrote: ↑Fri Jan 08, 2021 3:56 pm 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?

Posted: **Fri Jan 08, 2021 4:27 pm**

rhester72 wrote: ↑Fri Jan 08, 2021 4:00 pm
SegaSnatcher wrote: ↑Fri Jan 08, 2021 3:56 pm 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

Posted: **Fri Jan 08, 2021 11:08 pm**

@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)

Posted: **Fri Jan 08, 2021 11:34 pm**

rhester72 wrote: ↑Fri Jan 08, 2021 11:08 pm @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?

Posted: **Fri Jan 08, 2021 11:40 pm**

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

Posted: **Fri Jan 08, 2021 11:54 pm**

rhester72 wrote: ↑Fri Jan 08, 2021 11:40 pm 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.

Posted: **Sun Jan 10, 2021 10:02 pm**

rhester72 wrote: ↑Fri Jan 08, 2021 4:00 pm
SegaSnatcher wrote: ↑Fri Jan 08, 2021 3:56 pm 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.

Posted: **Mon Jan 11, 2021 2:15 am**

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

Posted: **Sun Nov 14, 2021 4:57 pm**

Is there a particular setting for this core that could make Crystal Castles work? The playfield has no gems. My guess is this is a bank switching thing?

Posted: **Sun Nov 14, 2021 5:15 pm**

I've heard the 7800 core might be better for 2600 games at the moment. You can try this pre release version.

Posted: **Sun Nov 14, 2021 5:42 pm**

telengard wrote: ↑Sun Nov 14, 2021 4:57 pm Is there a particular setting for this core that could make Crystal Castles work? The playfield has no gems. My guess is this is a bank switching thing?

Enable the superchip option in the core settings

Posted: **Sun Nov 14, 2021 7:13 pm**

telengard wrote: ↑Sun Nov 14, 2021 4:57 pm Is there a particular setting for this core that could make Crystal Castles work? The playfield has no gems. My guess is this is a bank switching thing?

Change the file extension to .F6S

Posted: **Mon Nov 15, 2021 12:52 am**

thanks everyone!

Posted: **Mon Nov 15, 2021 3:30 am**

akeley wrote: ↑Sun Nov 14, 2021 5:15 pm I've heard the 7800 core might be better for 2600 games at the moment. You can try this pre release version.

Woah, I have been greatly looking forward to this core with 2600 support! Unfortunately I am having two major issues with it:
- I can't get it to use the keyboard to press Reset and Select. I can map the keys, but they don't work.
- SNAC is still broken. I can run "Bugs" which doesn't require a Reset to start, just a paddle button press. The paddle button works, but the movement does not. I have SNAC Analog set to Yes. On my SNAC enabled 2600 core, everything works fine. Edit: Found this on the discord page and it states that Paddles are currently broken. That gives me hope that it will be fixed. Now if I could just get Reset to work, I could start playing some games!

Posted: **Mon Nov 15, 2021 1:07 pm**

thorr wrote: ↑Mon Nov 15, 2021 3:30 am
akeley wrote: ↑Sun Nov 14, 2021 5:15 pm I've heard the 7800 core might be better for 2600 games at the moment. You can try this pre release version.
Woah, I have been greatly looking forward to this core with 2600 support! Unfortunately I am having two major issues with it:
- I can't get it to use the keyboard to press Reset and Select. I can map the keys, but they don't work.
- SNAC is still broken. I can run "Bugs" which doesn't require a Reset to start, just a paddle button press. The paddle button works, but the movement does not. I have SNAC Analog set to Yes. On my SNAC enabled 2600 core, everything works fine. Edit: Found this on the discord page and it states that Paddles are currently broken. That gives me hope that it will be fixed. Now if I could just get Reset to work, I could start playing some games!

Paddles will never work via SNAC. the GPIO pins are a digital interface, and paddle movement is analog. It's not electrically possible. You will have to use some form of ADC for that purpose, but in reality, a usb adapter is a much better choice.

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