Search found 139 matches

by jotego
Sun Dec 02, 2018 9:59 am
Forum: MiST
Topic: Master System core: Bad Apple demo fails
Replies: 2
Views: 405

Master System core: Bad Apple demo fails

The Bad Apple demo fails to run on the SMS core. According to authors the requirements are:

- PAL Hardware
- SMS Generation VDP
- 256 Bank Support
by jotego
Mon Nov 26, 2018 2:15 pm
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 832
Views: 105395

Re: Genesis / Megadrive core ported to MiST

DanyPPC wrote:Good Jotego, so now it's possible that the sound of SuperStreetFughter 2 is correct too, is it right ?
Thanks for your effort to improve the YM2612 sound.


I think it is correct, but that game has very low volume settings so you may need external amplification.
by jotego
Sat Nov 24, 2018 8:00 am
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 832
Views: 105395

Re: Genesis / Megadrive core ported to MiST

And Titan 2 demo sounded correctly ... This has been an interesting week. After discussing it with the demo author and his insistance about real hardware writting correctly in less than 24 FM ticks; I made the hypothesis that YM2612 was indeed using two circular shift registers (CSR) in series copie...
by jotego
Tue Nov 20, 2018 12:30 pm
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 832
Views: 105395

Re: Genesis / Megadrive core ported to MiST

I experienced another strange thing, if Titan 2 has no music, then I start a game, like Super Skidmarks or Sonic 3, then reload Titan 2, it'll have music. Maybe it's just a co-incidence, or the duration of the T80 reset is not consistent, and not resetting the FM correctly, I don't know. How many c...
by jotego
Tue Nov 20, 2018 11:03 am
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 832
Views: 105395

Re: Genesis / Megadrive core ported to MiST

So no fixing needed for Titan Overdrive 2 Demo from my point of view. It is just out of spec. Yepp, Z80 must be slowed down with 68000 memory access wait states. If Z80 runs too fast, Titan Overdrive 2 will not work. That's definite. Regular games work with a fast Z80 because they check the BUSY bi...
by jotego
Tue Nov 20, 2018 6:57 am
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 832
Views: 105395

Re: Genesis / Megadrive core ported to MiST

Tested again and I don't have music (FM Sound?) on Titan Overdrive 2 demo. Sound effect work (PSG Sound?) and very shortly no audio at all. I am running the core on 15khz if that matters. I think I have explained it in other post. Titan Overdrive 2 Demo tries to push too much the maximum write spee...
by jotego
Fri Nov 16, 2018 11:35 am
Forum: News & Announcements
Topic: FX68K Cycle accurate 68000 core
Replies: 31
Views: 4997

Re: FX68K Cycle accurate 68000 core

Adding all these features is also of great value.
by jotego
Thu Nov 15, 2018 2:27 pm
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 832
Views: 105395

Re: Genesis / Megadrive core ported to MiST

DanyPPC wrote:Super Street Fighter has not correct sound, tested with 0.51 and 0.52


Yes, I hear the PSG sound a bit too long. I wonder if that gets fixed with the same fix as Alien 3. I'll try it with the newest FPGAgen core.
by jotego
Thu Nov 15, 2018 2:20 pm
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 832
Views: 105395

Re: Genesis / Megadrive core ported to MiST

slingshot wrote:Did you try it with "Fast VRAM speed?

I don't know what that is.

slingshot wrote:Alien 3 already fixed in git, I think connecting the FM reset to the Z80 reset fixed it.

Which one is your GIT repository? I was pulling from harbaum's one and the bug is still there.
by jotego
Thu Nov 15, 2018 2:17 pm
Forum: News & Announcements
Topic: FX68K Cycle accurate 68000 core
Replies: 31
Views: 4997

Re: FX68K Cycle accurate 68000 core

I assume that a cycle-accurate core was not available before this. Thank you for releasing it!

From the size point of view, it is a bit larger than TG68k.C but it should still fit in MiST without problems.

I'm glad you move it to github too.

Thanks a lot!
by jotego
Thu Nov 15, 2018 12:36 pm
Forum: FPGA Chat
Topic: JT03 -> YM2203 core released
Replies: 1
Views: 662

JT03 -> YM2203 core released

I have been working on adding full YM2203 capability to the JT12 core, as YM2203 and YM2612 both use the same OPN Yamaha core. I proudly present here the JT03 , which is an option inside JT12. When jt03 is used as the top module instead of jt12 you get a full YM2203, which differs from YM2612 in: -O...
by jotego
Wed Nov 14, 2018 10:12 pm
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 832
Views: 105395

Re: Genesis / Megadrive core ported to MiST

BUG REPORT (2)

Alisia Dragoon stage 2 has a broken background. It is very easy to pass stage 1 (and quick) so don't worry about that. I have taken two pictures for quick checking here and here.

I have only seen this in MiST. I don't know if it happens on MiSTer.
by jotego
Wed Nov 14, 2018 10:07 pm
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 832
Views: 105395

Re: Genesis / Megadrive core ported to MiST

BUG REPORT:

Alien 3 has normal music in Mister, but not in MiST. I normally get no sound in MiST. This is likely a system-level issue. As I said, MiSTer sounds completely normal. I won't look into this.
by jotego
Wed Nov 14, 2018 10:05 pm
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 832
Views: 105395

Re: Genesis / Megadrive core ported to MiST

Surely the DDR bandwidth is more than enough. I think that the problem with DDR is non-consequitive reads. Like having to read from many different ROMs at the same "time". As you have to prepare the DDR banks again you lose precious clock cycles there. So, even if the memory bandwidth is ...
by jotego
Wed Nov 14, 2018 1:57 pm
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 832
Views: 105395

Re: Genesis / Megadrive core ported to MiST

Being serious: I don't understand why he wants even 2 SDRAMs, the DE10-nano has plenty of BRAM for all internal RAMs of the Neo-Geo (if the specs on wikipedia is correct - it's almost the same amounts as Genesis). And these numbers are suspicious: LSPC2: 532 LC NEO-B1: 130 LC NEO-C1: 58 LC NEO-ZMC2...
by jotego
Wed Nov 14, 2018 12:01 pm
Forum: MiST
Topic: MiST core and firmware changelog
Replies: 73
Views: 41268

Re: MiST core and firmware changelog

MasterOfGizmo wrote:Ram may indèed be an issue.

But one thing that might be easy to add is a way to load multiple roms automatically if they match a pattern like corename0.bin, corename1.bin ...


There are many arcade dumps that follow a pattern. Maybe that is a good option too.
by jotego
Wed Nov 14, 2018 9:36 am
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 832
Views: 105395

Re: Genesis / Megadrive core ported to MiST

I never thought of having such a faithful Genesis Core, at this point I would not be surprised about a possible SuperNes Core with same quality. I think NeoGeo will come first. Although because of the sheer size of some NeoGeo ROMs I don't think we'll be able to get all games working. At least in M...
by jotego
Tue Nov 13, 2018 9:31 pm
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 832
Views: 105395

Re: Genesis / Megadrive core ported to MiST

jotego, is there a download for the 0.52 version. I think the one at https://github.com/mist-devel/mist-binaries/tree/master/cores/fpgagen is 0.51. I'll do some more testing when I get the later version. Thanks for your amazing work on this FM beauty, it sounds incredible. This is the last synthesi...
by jotego
Tue Nov 13, 2018 3:55 pm
Forum: FPGA Chat
Topic: Alternative to GPL license
Replies: 16
Views: 1263

Re: Alternative to GPL license

While this is still true for the HDL files describing a design, the acts of manufacturing a device based on the design, or using such a device, are not subject to copyright. So i don't see much contradict here. It's like endless patents war between Apple and Samsung. They don't have rights to devic...
by jotego
Tue Nov 13, 2018 1:59 pm
Forum: FPGA Chat
Topic: Alternative to GPL license
Replies: 16
Views: 1263

Re: Alternative to GPL license

Many interesting comments in this thread. Just some notes... I do not agree to that distinction of good and bad guys. In general, I do not agree to the world view of large companies being evil and small ones being angels. If I agreed to it, I wouldn't be working on implementations of chips from larg...
by jotego
Tue Nov 13, 2018 12:38 pm
Forum: MiST
Topic: MiST core and firmware changelog
Replies: 73
Views: 41268

Re: MiST core and firmware changelog

Feature Request I think it would be good to add zip support to the firmware. We normally have the ROMs stored in zip format so it is more convenient to copy data over that way. Another reason, is that once we start having support for more arcade platforms -particularly NeoGeo- the ZIP format is a ne...
by jotego
Sun Nov 11, 2018 10:45 am
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 832
Views: 105395

Re: Genesis / Megadrive core ported to MiST

Super Street Fighter II graphic glitches are gone with fpgagen-20181109.rbf but the music and sound still has issues and is very quiet with this game. I have tried the different Street Fighter II games: ⋅ Street Fighter II Special Champion Edition: volume is low, but music and SFX are cor...
by jotego
Fri Nov 09, 2018 5:52 pm
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 832
Views: 105395

Re: Genesis / Megadrive core ported to MiST

What git revision produced this ogg file? My problem was not missing sounds, but with 0.51, the Titan 2 sounds almost perfect, however with 0.52 there are wrong, harsh sounds from the beginning (almost like with 0.41, when the music "crashed" at the opening scene). I've used 46809cc (tagg...
by jotego
Fri Nov 09, 2018 4:41 pm
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 832
Views: 105395

Re: Genesis / Megadrive core ported to MiST

Maybe if you can spend a tiny amount of time more on YM2612 :) Here I found a link to a vgm (vgz) file for Titan 2, tried in a VGM player, seems legit, contains the soundtrack from 0:45: https://www.youtube.com/watch?v=730XR6Nc89A I have run that VGM with my simulation setup. You can hear the outpu...
by jotego
Fri Nov 09, 2018 10:23 am
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 832
Views: 105395

Re: Genesis / Megadrive core ported to MiST

The difference between 0.52 and 0.51 is that 0.52 has the correct bit width in the phase increment field. This translates to having correct sounds when the software overflows the frequency value. This is obvious in the title screen of Scooby Doo . You can try loading that with 0.52 and 0.51 and will...

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