Atari 7800 Core

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kamshaft
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Atari 7800 Core

Unread post by kamshaft »

Found this...
https://github.com/Kitrinx/Atari7800_MiSTer

It's two years old.
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Re: Atari 7800 Core

Unread post by tontonkaloun »

yes there is not much and very few games that work
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Re: Atari 7800 Core

Unread post by lroby74 »

Would be nice to have an updated 7800 working code
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Re: Atari 7800 Core

Unread post by Moondandy »

Rysha/Kitrix said she would do the 7800 after finishing the 2600, but problem is she isn't terribly motivated to finish the 2600. I don't think it is a fun core to work on.

It's a real shame, as they are popular and big consoles. Maybe Sorg, or another dev, will tag team with her at some point and they will knock them out in a weekend. I know what it's like when you have a big project that isn't fun to work one and are doing it on your own.
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Re: Atari 7800 Core

Unread post by lroby74 »

Atari Lynx core has been realized..

Now would be nice to have an updated working Atari 7800 core too :(
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Re: Atari 7800 Core

Unread post by deltax0 »

Atari 7800 has been updated by over there in the discord. By Rysha
The new build is very good now. The older builds where tarrable. New build plays mostly everything.
It's barley a beta build now. but still alpha. looks like it may get a release some time soon.
They said look for Trebors_7800_ROM_PROPack. it works better as the headers are better or something. got smokes pack games running fine thou.
I have uploaded it for you guys. same one's from discord.
https://drive.google.com/file/d/10gBlDx ... sp=sharing
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Re: Atari 7800 Core

Unread post by djsquare »

deltax0 wrote: Sun Mar 21, 2021 1:37 pm Atari 7800 has been updated by over there in the discord. By Rysha
The new build is very good now. The older builds where tarrable. New build plays mostly everything.
It's barley a beta build now. but still alpha. looks like it may get a release some time soon.
They said look for Trebors_7800_ROM_PROPack. it works better as the headers are better or something. got smokes pack games running fine thou.
I have uploaded it for you guys. same one's from discord.
https://drive.google.com/file/d/10gBlDx ... sp=sharing
This is very playable indeed. Thanks for sharing
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Re: Atari 7800 Core

Unread post by deltax0 »

I read it was Rysha's side project. Just something she worked on on her free time.
She just decided to put a bunch of work into it just recently. I think most games play fine.
Hope it gets officially released with some more fixes soon.
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Re: Atari 7800 Core

Unread post by Pepeart »

Tried the core but its not working on my sony pvm 15khz :(
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Re: Atari 7800 Core

Unread post by dmckean »

Pepeart wrote: Mon Mar 22, 2021 5:23 am Tried the core but its not working on my sony pvm 15khz :(
The version shared above is old now. There was a problem with video that was fixed on the 17th. I recommend waiting until it's released.
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Re: Atari 7800 Core

Unread post by deltax0 »

Pepeart wrote: Mon Mar 22, 2021 5:23 am Tried the core but its not working on my sony pvm 15khz :(
try it on the hdmi tv. It's still alpha stages.
Wait for release i guess. Just hope it does.
Whatever one's i found on discord i snatched up. If you got newer one please share.
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Re: Atari 7800 Core

Unread post by BigBossMaeda »

Pepeart wrote: Mon Mar 22, 2021 5:23 am Tried the core but its not working on my sony pvm 15khz :(
It works on my crt, I'm using a PVM 2530.
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Re: Atari 7800 Core

Unread post by rcade »

This works great. Almost everything plays with the 3-21 version
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Re: Atari 7800 Core

Unread post by lroby74 »

Tried it on my Sony 21" CRT Trinitron, it works very nicely, i love it!!!
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Re: Atari 7800 Core

Unread post by metalfacemark »

oh sweet, ive always wanted to try the 7800.
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Re: Atari 7800 Core

Unread post by deltax0 »

new version over there on mister discord.
I bet a official build in the updater is incoming.
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Re: Atari 7800 Core

Unread post by Kitrinx »

This core is now released, enjoy :)
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Re: Atari 7800 Core

Unread post by akeley »

It's dangerous to go unheadered. Take this!
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Re: Atari 7800 Core

Unread post by pbsk8 »

is Rikki & Vikki supported?
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Re: Atari 7800 Core

Unread post by dmckean »

pbsk8 wrote: Sat Apr 17, 2021 9:32 pm is Rikki & Vikki supported?
Yes, without music but with sound effects. You also have to create your own header for the .bin file.
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Re: Atari 7800 Core

Unread post by Kitrinx »

pbsk8 wrote: Sat Apr 17, 2021 9:32 pm is Rikki & Vikki supported?
You can use this bps patch to add the header to FoxBox.bin (or whatever you have the rom named)
Attachments
Rikki and Vikki patch.zip
(274 Bytes) Downloaded 247 times
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Re: Atari 7800 Core

Unread post by Chris23235 »

What a great core. I love the color temperature option, with Hot the picture has the same colours as on my PAL machine on a CRT. Many thanks.

I noticed that the Pokey demos from the Trebor Pack don't work. Any chance to get them playing?
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Re: Atari 7800 Core

Unread post by pgimeno »

The MAME archive contains three roms:

Code: Select all

    4096  Defl:X     2325  43% 1996-12-24 23:32 5d13730c  7800.u7
   16384  Defl:X     9696  41% 1996-12-24 23:32 d5b61170  a7800p/7800pal.rom
   16384  Defl:X     9700  41% 1996-12-24 23:32 a0e10edf  c300558-001a.u7
Which one should I install as boot0.rom?
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Re: Atari 7800 Core

Unread post by Kitrinx »

Chris23235 wrote: Sun Apr 18, 2021 10:29 am What a great core. I love the color temperature option, with Hot the picture has the same colours as on my PAL machine on a CRT. Many thanks.

I noticed that the Pokey demos from the Trebor Pack don't work. Any chance to get them playing?
I actually debugged this for quite a while and discovered the issue is that they don't work on real hardware. Some flash carts may pre-initialize things they need, but it's actually an accuracy that they don't work, not a bug. I believe they won't work on Dragonfly cart either.
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Re: Atari 7800 Core

Unread post by Kitrinx »

pgimeno wrote: Sun Apr 18, 2021 11:27 am The MAME archive contains three roms:

Code: Select all

    4096  Defl:X     2325  43% 1996-12-24 23:32 5d13730c  7800.u7
   16384  Defl:X     9696  41% 1996-12-24 23:32 d5b61170  a7800p/7800pal.rom
   16384  Defl:X     9700  41% 1996-12-24 23:32 a0e10edf  c300558-001a.u7
Which one should I install as boot0.rom?
There are many dumps of atari 7800 bioses, but usually the 4kb NTSC one is the best and the 16kb PAL one. If you choose to use a bios you will have to switch it between PAL and NTSC games. Additionally some homebrew games, like Defender, will break if you use a BIOS due to incorrect signatures. Alternatively you can skip the bios and all games will work.
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Re: Atari 7800 Core

Unread post by 12characters »

It says that 2600 is not yet enabled, which hints that it is a planned feature. Considering that there is already a standalone Atari 2600 core, what would be the advantage of enabling the backwards compatibility for the 7800 core?
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Re: Atari 7800 Core

Unread post by kathleen »

12characters wrote: Sun Apr 18, 2021 2:54 pm It says that 2600 is not yet enabled, which hints that it is a planned feature. Considering that there is already a standalone Atari 2600 core, what would be the advantage of enabling the backwards compatibility for the 7800 core?
To behaves as the original hardware which allowed the use of most 2600 games. To me this is important even if there is a A2600 core.

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Re: Atari 7800 Core

Unread post by Lightwave »

12characters wrote: Sun Apr 18, 2021 2:54 pm It says that 2600 is not yet enabled, which hints that it is a planned feature. Considering that there is already a standalone Atari 2600 core, what would be the advantage of enabling the backwards compatibility for the 7800 core?
The current 2600 core has issues. The potential here would be to have a more accurate 2600.
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Re: Atari 7800 Core

Unread post by Chris23235 »

Kitrinx wrote: Sun Apr 18, 2021 11:42 am
Chris23235 wrote: Sun Apr 18, 2021 10:29 am What a great core. I love the color temperature option, with Hot the picture has the same colours as on my PAL machine on a CRT. Many thanks.

I noticed that the Pokey demos from the Trebor Pack don't work. Any chance to get them playing?
I actually debugged this for quite a while and discovered the issue is that they don't work on real hardware. Some flash carts may pre-initialize things they need, but it's actually an accuracy that they don't work, not a bug. I believe they won't work on Dragonfly cart either.
Thanks for the info.
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Re: Atari 7800 Core

Unread post by Kitrinx »

12characters wrote: Sun Apr 18, 2021 2:54 pm It says that 2600 is not yet enabled, which hints that it is a planned feature. Considering that there is already a standalone Atari 2600 core, what would be the advantage of enabling the backwards compatibility for the 7800 core?
Since a 7800 is basically a 2600 with one extra chip, I would like to add full 2600 support to it as well. While the current 2600 core does pretty well, it does have various issues, is written in VHDL, and doesn't use clock enables, which makes things like pausing the core more difficult. I decided to write my own RIOT and TIA in addition to the Maria chip, so it only makes sense to get the 2600 part of things polished up as well.
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