Atari 2600 games that do not work on the latest core

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Re: Atari 2600 games that do not work on the latest core

Postby slingshot » Sun Dec 16, 2018 5:43 pm

Neuro wrote:I was thinkong searching it in the load rom module.
If i found somenthing i will post it here.

The ROM loader on the ARM side is a generic one, used from ZX81 to Genesis. Also there isn't a large buffer space on the MCU for storing the whole ROM and search in it. I don't say the searching cannot be implemented in the FPGA (the A2600 core is a small one, there are plenty of space), but I don't have any motivation to do it. A good exercise for who want to learn some HDL coding.

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Re: Atari 2600 games that do not work on the latest core

Postby DanyPPC » Tue Dec 25, 2018 12:52 pm

Is there hope to play Scramble with this fantastic core ? :)

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Re: Atari 2600 games that do not work on the latest core

Postby vebxenon » Wed Dec 26, 2018 12:36 am

DanyPPC wrote:Is there hope to play Scramble with this fantastic core ? :)


Or Mappy :cheers:
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Re: Atari 2600 games that do not work on the latest core

Postby slingshot » Wed Dec 26, 2018 3:08 pm

Scramble uses a custom chip (called DPC) in the cart, like Pitfall II. Unless someone implements it, these games won't work.

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Re: Atari 2600 games that do not work on the latest core

Postby DanyPPC » Wed Dec 26, 2018 4:43 pm

Ah, ok. I didn't know about it. Thanks.

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Re: Atari 2600 games that do not work on the latest core

Postby Neuro » Thu Dec 27, 2018 1:44 pm

slingshot wrote:Scramble uses a custom chip (called DPC) in the cart, like Pitfall II. Unless someone implements it, these games won't work.


Victor Trucco, has an implementatiom od the dpc for the atari 2600 core.
You can see it here:
https://gitlab.com/victor.trucco/Multic ... oFlash.vhd

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Re: Atari 2600 games that do not work on the latest core

Postby slingshot » Fri Jan 11, 2019 10:09 pm

New release:
https://github.com/mist-devel/mist-bina ... 190111.rbf

- Fixed the FE mapper (Decathlon, Robot Tank)
- Some TIA fixes (Frostbite, Combat, Out of Control)
- Fixed the keyboard handler (for F9 and F10)
- Added Victor Trucco's DPC chip implementation for Pitfall II Lost Caverns. Need a .p2 extension to activate it.

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Re: Atari 2600 games that do not work on the latest core

Postby vebxenon » Sat Jan 12, 2019 8:42 am

slingshot wrote:New release:
https://github.com/mist-devel/mist-bina ... 190111.rbf

- Fixed the FE mapper (Decathlon, Robot Tank)
- Some TIA fixes (Frostbite, Combat, Out of Control)
- Fixed the keyboard handler (for F9 and F10)
- Added Victor Trucco's DPC chip implementation for Pitfall II Lost Caverns. Need a .p2 extension to activate it.


Wow. Thanks!! :cheers: Hope soon new titles like Mappy and Scramble will work also.

How about some Parker Brothers titles like Star Wars: The Arcade Game and Supercharger games in .bin format? :D
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Re: Atari 2600 games that do not work on the latest core

Postby slingshot » Sat Jan 12, 2019 12:45 pm

vebxenon wrote:
How about some Parker Brothers titles like Star Wars: The Arcade Game and Supercharger games in .bin format? :D


Parker Bros games are usually use the E0 mapper which is implemented (just rename the file to xxx.E0). You can check in the Stella emu cartridge info if not sure.

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Re: Atari 2600 games that do not work on the latest core

Postby vebxenon » Sat Jan 12, 2019 2:31 pm

slingshot wrote:
vebxenon wrote:
How about some Parker Brothers titles like Star Wars: The Arcade Game and Supercharger games in .bin format? :D


Parker Bros games are usually use the E0 mapper which is implemented (just rename the file to xxx.E0). You can check in the Stella emu cartridge info if not sure.


Ok :-) , thanks for the info. Also Frogger now is more playable. Screen isn't now always shaking.

Thanks again! :D
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Re: Atari 2600 games that do not work on the latest core

Postby vebxenon » Mon Jan 14, 2019 12:51 pm

Hi :D What are the new features on a2600_190113.rbf?

Thanks! :D :cheers:
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Re: Atari 2600 games that do not work on the latest core

Postby slingshot » Mon Jan 14, 2019 3:59 pm

Just some fix to the previous fixes :)
+ a joystick swap option.

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Re: Atari 2600 games that do not work on the latest core

Postby DanyPPC » Wed Jan 16, 2019 8:44 am

I have out-of-sync on most games through the YPbPr Cable, as the previous SMS core, then fixed.

Is it possible to fix this problem on A2600 core too ?

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Re: Atari 2600 games that do not work on the latest core

Postby slingshot » Wed Jan 16, 2019 8:55 am

On SMS, the blanking and vertical sync generated by the core, that can be fixed, on A2600, it's up to the game when these events are happening, not much I can fix in the core.

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Re: Atari 2600 games that do not work on the latest core

Postby DanyPPC » Wed Jan 16, 2019 9:29 am

Ok, I understand. Thanks for the explanation.

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Re: Atari 2600 games that do not work on the latest core

Postby vebxenon » Mon Jan 21, 2019 1:12 pm

I've found issues with two Sega games on last 2600 core:

- Sub Scan, game starts, but then screen goes black and I need to reset MiST.
- Tac Scan, game starts, but there are a lot of graphical issues :shrug:

Thanks for your work! :cheers:
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Re: Atari 2600 games that do not work on the latest core

Postby slingshot » Mon Jan 21, 2019 1:20 pm

Did they work previously?

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Re: Atari 2600 games that do not work on the latest core

Postby vebxenon » Mon Jan 21, 2019 1:50 pm

slingshot wrote:Did they work previously?


Sub Scan yes, Tac Scan had the same graphical problems.
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Re: Atari 2600 games that do not work on the latest core

Postby slingshot » Mon Jan 21, 2019 10:32 pm

Here's a test version which fixes Tac Scan, but need some help to test if the fix doesn't break something else.
Sub Scan works on TV for me, maybe just the sync signals are confusing the scandoubler on VGA.

Tac Scan abuses the hardware a bit, as the Stella Programming Guide says:
motion registers should not be modified during the 24 computer cycles immediately following an HMOVE command. Unpredictable motion values may result.

Guess when it writes to HMBL reg?
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Re: Atari 2600 games that do not work on the latest core

Postby vebxenon » Tue Jan 22, 2019 9:42 am

slingshot wrote:Here's a test version which fixes Tac Scan, but need some help to test if the fix doesn't break something else.
Sub Scan works on TV for me, maybe just the sync signals are confusing the scandoubler on VGA.

Tac Scan abuses the hardware a bit, as the Stella Programming Guide says:
motion registers should not be modified during the 24 computer cycles immediately following an HMOVE command. Unpredictable motion values may result.

Guess when it writes to HMBL reg?


I've tested all the games I have in my card (302 normal games and 16 superchip), and I've only found a problem on Pole Position, speed indicator is now corrupted. But for example, on Donkey Kong Remake (Super Chip) http://atariage.com/forums/topic/206497-dk-vcs/ now although still not well, texts between stages are better displayed, before they were corrupted.
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Re: Atari 2600 games that do not work on the latest core

Postby slingshot » Tue Jan 22, 2019 3:11 pm

vebxenon wrote:
I've tested all the games I have in my card (302 normal games and 16 superchip), and I've only found a problem on Pole Position, speed indicator is now corrupted. But for example, on Donkey Kong Remake (Super Chip) http://atariage.com/forums/topic/206497-dk-vcs/ now although still not well, texts between stages are better displayed, before they were corrupted.


Great, thanks.
Donkey Kong's shfited texts are only off by 1-pixel (Atari pixels are pretty large). Will be a good hunt for it.
Upd.: another test version attached
Donkey Kong Remake, Tac Scan, Pole Position, Juno First are ok for me.
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Re: Atari 2600 games that do not work on the latest core

Postby vebxenon » Sat Jan 26, 2019 7:44 am

There's a new Core :D versión..What's the changelog? :cheers:

https://github.com/mist-devel/mist-bina ... ores/a2600

Thanks!

PS: I didn't see last test version :oops:
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Re: Atari 2600 games that do not work on the latest core

Postby DanyPPC » Sat Jan 26, 2019 8:08 am


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Re: Atari 2600 games that do not work on the latest core

Postby vebxenon » Sat Jan 26, 2019 9:33 am

DanyPPC wrote:https://github.com/mist-devel/mist-binaries/commits/master


I've done now my tests. This core is nearly perfect :D :cheers:
Just a computer and videogame lover :)

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Re: Atari 2600 games that do not work on the latest core

Postby vebxenon » Sat Jan 26, 2019 10:19 am

Pac-Man 8K now works like a charm! :cheers: :cheers:

https://www.youtube.com/watch?v=fLrYmNCAUBk

Download it here :cheers: http://atariage.com/forums/topic/229152 ... try3298369 (pacman2600_8k_v5.bin)
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