New 6526 (CIA) Implementation for the C64 core

[Chris23235]

Rayne released his new implementation of the 6526 chip. He talks about improved compability:

https://mist-fpga.net/viewtopic.php?f=1 ... 2138#p2138

[slingshot]

Great!

If someone can contact him, then can asked to check it via this test suite (it mostly tests the timers)?
http://www.zimmers.net/anonftp/pub/cbm/ ... ia6526.zip

The current one is passing more tests.

[slingshot]

And another note: the archive I've posted above contains documents about the inner workings of the timers, so a cycle-accurate version can be implemented.

[slingshot]

I've finished integrating Rayne's CIA, but rewritten the timers. All CIA timer tests are passing! So somebody could tell him a thanks And he can check the modified CIA here:
https://github.com/mist-devel/mist-boar ... /mos6526.v
Hammerfist still works.

Also found out the SID problem in many games, like Hysteria and West Bank, also fixed.
Grab the release here:
https://github.com/mist-devel/mist-bina ... 190127.rbf

[DrOG]

...
Also found out the SID problem in many games, like Hysteria and West Bank, also fixed.
Grab the release here:
https://github.com/mist-devel/mist-bina ... 190127.rbf

Very nice! Thanks a lot!

[NegSol]

Great! I really like the new version

[Sorgelig]

Also found out the SID problem in many games, like Hysteria and West Bank, also fixed.

I've tried to find any traces in internet where it's written that SID registers can be read, but couldn't find any.
Where did you get such info?

[DanyPPC]

Oh, that's a great news !

Many thanks Slingshot

[slingshot]

Also found out the SID problem in many games, like Hysteria and West Bank, also fixed.

I've tried to find any traces in internet where it's written that SID registers can be read, but couldn't find any.
Where did you get such info?

I had just some luck, I think:
https://www.c64-wiki.de/wiki/Ultimate_64/Testbericht
Maybe not all have to be read, I think the most important is the control reg.

Now just Outrun's samples are missing, probably the filters?

Upd.: on that page I linked, there are quite a lot of tests. If somebody wants to run them, and report which ones are failing, that could help on further development.

[DanyPPC]

Yes, OutRun plays for some seconds but then one of two voices are mute.

Gutz, West bank and Hysteria are perfect.
Hysteria needs to select 6581 emulation for hear sound/music.

[slingshot]

I didn't update the 8580.

[DanyPPC]

This is not a problem. 8580 emulation is very good !

[Chris23235]

I've finished integrating Rayne's CIA, but rewritten the timers. All CIA timer tests are passing! So somebody could tell him a thanks And he can check the modified CIA here:
https://github.com/mist-devel/mist-boar ... /mos6526.v
Hammerfist still works.

Also found out the SID problem in many games, like Hysteria and West Bank, also fixed.
Grab the release here:
https://github.com/mist-devel/mist-bina ... 190127.rbf

I posted your message on mist-fpga.net

https://mist-fpga.net/viewtopic.php?f=1 ... 2149#p2149

[DanyPPC]

I forgot to sat that now Frantic Freddie works perfectly !

Tested some demo from the scene like Uncensored, Comalight 13, The Concert by Performers, Wonderland XIII and they work.
Really great update ! Many thanks again Slingshot.

[slingshot]

I posted your message on mist-fpga.net

https://mist-fpga.net/viewtopic.php?f=1 ... 2149#p2149

Thanks!

[slingshot]

I forgot to sat that now Frantic Freddie works perfectly !

Great, good to know!

[vebxenon]

Thanks very much, Slingshot!

[christianlucio]

Many thanks to our new hero !

You have made millions of people very happy !

[slingshot]

If millions of people would still enjoy a C64, we would live in a better world I think

[Sorgelig]

If millions of people would still enjoy a C64, we would live in a better world I think

Take higher - billions!

[slingshot]

If millions of people would still enjoy a C64, we would live in a better world I think

Take higher - billions!

C64 for everyone

[slingshot]

This guy plays on a synth, which is the creation of the SID's father (he told this synth's chip is what he wanted the SID become originally):
https://www.youtube.com/watch?v=osll7E0f0IY

[vebxenon]

New release!

https://github.com/mist-devel/mist-bina ... res/fpga64

[slingshot]

New release!

https://github.com/mist-devel/mist-bina ... res/fpga64

Try Turbo Outrun!
Hope I didn't broke something else.

[DanyPPC]

What can I say.... simply great !

Even on the Ultimate 64 with last firmware 1.0B this game has problem on intro with the soundtrack.
Now MiST/MiSTer are very good replacement of the original machine.

I have 10 C64 at home and compared the sound of any single SID 6581 with this game, I admit MiST sounds excellent because this is a game which the soundtrack has always brought the various revisions of SID to its knees. In my case only SID 6581R4AR play the intro soundtrack very well.

Now MiST is better of my C64s.... It's simply W O N D E R F U L ! ! !

and all thanks to Slingshot improvements.
I will never stop thanking you for what you do !