Search found 124 matches

by sebdel
Thu Feb 07, 2019 8:43 am
Forum: Atari Legend Forum
Topic: RIP Steve Bak
Replies: 7
Views: 1870

RIP Steve Bak

I'm sad to report that Steve Bak, from Goldrunner, Return to Genesis and others fame, has passed away as reported on twitter by his son: https://twitter.com/niinegames/status/1093256843944755213 I'll remember him as the absolute master of fast, software only 50Hz scrolling on the ST. No one came clo...
by sebdel
Wed Dec 19, 2018 10:13 am
Forum: MiST
Topic: NES core on MiST
Replies: 185
Views: 56270

Re: NES core on MiST

Do you guys know why the controllers are crossed on the NES core? I mean in the code itself, it basically says "NES_JoyA = Mist_JoyB". It's always been like that too, from the get go. I noticed that the MiSTer changed that in their repo. Should we change it too? Did you noticed any oddness...
by sebdel
Tue Dec 11, 2018 12:38 pm
Forum: MiST
Topic: NES core on MiST
Replies: 185
Views: 56270

Re: NES core on MiST

Overall, the core went from 35% to 75% gate consumption and now takes more than 30min to compile, up from 12min. :coffe: Great! Do you have the source changes? 1-2 month ago I've made a small change when the scandoubler's RAM was not inferred to BRAM, and consumed about 10k LCs. Is the new FM chip ...
by sebdel
Tue Dec 11, 2018 8:08 am
Forum: MiST
Topic: NES core on MiST
Replies: 185
Views: 56270

Re: NES core on MiST

Credits go to all the respective contributers of course :cheers: , I merely merged and compiled. That was a bit short, let's try again like I mean it. Credits for the newly merged contributions go like this: sogerlig : Numerous audio/video/timings fixes. Swapped to T65 CPU. Created MiSTer. enough s...
by sebdel
Mon Dec 10, 2018 10:19 pm
Forum: MiST
Topic: NES core on MiST
Replies: 185
Views: 56270

Re: NES core on MiST

Hello everyone, here's a version of the NES core with most of the MiSTer improvements (except the RAM save, I'll do that next). It's supposed to support more mappers, like the one used by TOEI, powerpack, fds, and audio improvements (SMB3 fixed?) Anyway, I don't know half of these feature and I don'...
by sebdel
Fri Apr 27, 2018 7:38 pm
Forum: Ym rockin'
Topic: Looking for YM Format FULL documentation
Replies: 10
Views: 7659

Re: Looking for YM Format FULL documentation

Sorry for the late reply and thanks for all the details, this is the sort of things I'm looking for. I found that Gwem's tutorials about maxymizer were also invaluable in understanding all those advanced effects. Lately I realized that if I want to drive the YM "perfectly", merely streamin...
by sebdel
Tue Apr 17, 2018 4:51 pm
Forum: Ym rockin'
Topic: Looking for YM Format FULL documentation
Replies: 10
Views: 7659

Re: Looking for YM Format FULL documentation

The YM format is known for not capturing sampled data correctly as it samples the registers at 50Hz, too slow for true digi sample replay. Otherwise IMHO these are the most complrte descriptions I have seen sofar, esp. the one by skeezix. I doubt there are documents going even deeper. If you find t...
by sebdel
Mon Apr 16, 2018 4:32 pm
Forum: Ym rockin'
Topic: Looking for YM Format FULL documentation
Replies: 10
Views: 7659

Re: Looking for YM Format FULL documentation

Thank you guys. Right after I posted this, I found the source code for StSound. That's as good as it gets I'm afraid. God, I hate C++ so much (and I'm writing js code these days) :( re: YM format limitations, I'm aware of them but like many hackers on the internet I just take the easy road. The time...
by sebdel
Mon Apr 16, 2018 11:33 am
Forum: Ym rockin'
Topic: Looking for YM Format FULL documentation
Replies: 10
Views: 7659

Looking for YM Format FULL documentation

Hi, I'm late to the "drive an YM with an arduino" party, but I'm having a lot of fun right now. I got the basics working (playing an ym file), but now I would like to improve the sound quality and special effects support. My plan is to make full use of the arduino hardware, esp. the 3 prog...
by sebdel
Thu Jun 01, 2017 4:47 pm
Forum: MiST
Topic: Problem with Repository?
Replies: 4
Views: 2181

Re: Problem with Repository?

Most new cores are hosted in their respective author repositories. mist-devel only has the Till cores + others historically maintained there.
Which one were you looking for?
by sebdel
Fri May 12, 2017 9:52 pm
Forum: MiST
Topic: ZX-UNO Spectrum FPGA
Replies: 101
Views: 37333

Re: ZX-UNO Spectrum FPGA

Just ordered a spectrum next. I'm weak... I would pay twice as much for a Atari ST next though :(
by sebdel
Tue Apr 25, 2017 6:56 pm
Forum: MiST
Topic: NES core on MiST
Replies: 185
Views: 56270

Re: NES core on MiST

thanks I have had a tinker and my rom is the same as the one you have provided - and i have discovered the issue too... it dosnt like being loaded after another rom!! if its the first rom you load after starting the nes core it runs perfectly however if you try and run it after playing something el...
by sebdel
Tue Apr 25, 2017 7:53 am
Forum: MiST
Topic: Jupiter Ace arrives at MiST
Replies: 34
Views: 9778

Re: Jupiter Ace arrives at MiST

I've started my first steps with the mist and learned how to port stuff. I was so happy that the cores even run and later did my first own addition with the Apple II soundcard (even though it works more or less). That said I'm far from looking at time constraints or gated clocks because its far ahe...
by sebdel
Mon Apr 24, 2017 8:08 am
Forum: MiST
Topic: NES core on MiST
Replies: 185
Views: 56270

Re: NES core on MiST

It turns out that this game was made available for free by the copyright holder. So no need for precautions here :)
Here's the ROM I am using and it's working fine for me with the latest NES core: http://yolkfolk.com/flash/wldfinal.nes

Let me know what problems you have.
by sebdel
Thu Apr 20, 2017 6:15 am
Forum: MiST
Topic: NES core on MiST
Replies: 185
Views: 56270

Re: NES core on MiST

Has anybody got any idea why wonder land dizzy dosnt work? Or how to fix it? I'll have a look. If you have the rom and linux, could you please dump the header with the command "hexdump -C -n16 YOUR_ROM.NES" ? If not, just tell me where to get it. I believe a direct link is not allowed but...
by sebdel
Wed Apr 19, 2017 9:46 am
Forum: MiST
Topic: NES core on MiST
Replies: 185
Views: 56270

Re: NES core on MiST

Gradius II uses Mapper 25 aka Konami VRC4. Looks like this mapper is not supported by the MiST. That's what the official Gradius II cartridge does, but I suspect this is not the probem here. The only ROM dump I can find for Gradius II uses mapper 4 (which we support) but has a trainer (which we don...
by sebdel
Wed Apr 05, 2017 12:43 pm
Forum: MiST
Topic: NES core on MiST
Replies: 185
Views: 56270

M

Here is a list of all available mappers: https://wiki.nesdev.com/w/index.php/List_of_mappers https://wiki.nesdev.com/w/index.php/Mapper Let me see if I understand this issue: -There were different ways of connecting chips inside each game cartridge. -The cartridges received all signals from the NES...
by sebdel
Wed Jan 25, 2017 1:29 pm
Forum: Demos - General
Topic: NAOS Punish your machine screen
Replies: 0
Views: 6806

NAOS Punish your machine screen

Hello, here are the sources for the NAOS punish your machine screen (without the intro part, sorry). There are bits and pieces of GFA to generate data files, a test program for the starfield projection routine and the whole screen. Note that the ICC_2.S misses key context initialization and as such ...
by sebdel
Sat Jan 07, 2017 4:37 pm
Forum: MiST
Topic: NES core on MiST
Replies: 185
Views: 56270

Re: NES core on MiST

I think on these old monitor you have a setting to manually adjust the position and size of the image. I'm not surprised that it doesn't match the amiga core alignment by the way: all cores have slightly different clocks.
by sebdel
Tue Dec 20, 2016 9:43 am
Forum: MiST
Topic: [Solved] MiST Hardware Revisions? MSX-Core-Problem
Replies: 213
Views: 39646

Re: MiST Hardware Revisions? MSX-Core-Problem

Might just be an unstable core. From my experience the smallest glitch in certain clock signals can make the core startup completely random. I would not be surprised if the NES core never booted on a certain number of MiST for example but I can't prove it and I also don't know if I fixed it :) The R...
by sebdel
Tue Nov 22, 2016 7:51 am
Forum: MiST
Topic: NES core on MiST
Replies: 185
Views: 56270

Re: NES core on MiST

Not really, but I still have a couple of months to work on the mist nearly full time, so in order to not get burnt out I switch tasks every now and then. Here's a list of things I work on: - NES core: Persisted RAM. Status: I tried and it doesn't work. I'll try again eventually. - YMSoC core: A core...
by sebdel
Sun Nov 13, 2016 11:00 am
Forum: MiST
Topic: Updating the core spreadsheet
Replies: 14
Views: 5149

Re: Updating the core spreadsheet

RobertK wrote:Thanks for your effort. The following cores also support 15khz (successfully tested by me):
Apogee
BBC
BK0011M
QL
Spectrum
Vector06

However, I couldn't get these two cores (15kHz support according to the list) running on my old TV:
Aquarius
Videopac


Aquarius does not support 15KHz.
by sebdel
Fri Nov 04, 2016 4:01 pm
Forum: MiST
Topic: Extra MIST I/O?
Replies: 18
Views: 5145

Re: Extra MIST I/O?

The LED signal could be sacrificed ? Or you could use an external shift register, like this one: https://www.sparkfun.com/products/13699
by sebdel
Thu Nov 03, 2016 10:10 am
Forum: MiST
Topic: JT51 Released
Replies: 10
Views: 3716

Re: JT51 Released

2 questions:
- What clock frequency should I use ? As high as possible ?
- Do you emulate accurately the behavior of the (B)usy bit, i.e. does a register write really take up to 68 clocks ? (cf. page 7 of http://www.figment.biz/ServiceManuals/ym2151synthesis.pdf)
by sebdel
Wed Nov 02, 2016 10:51 am
Forum: MiST
Topic: Colecovision core issues
Replies: 3
Views: 2430

Re: Colecovision core issues

These are not official games and the Colecovision did not support cartridges >32KB apparently. So I would not call that a "core issue" but rather a "feature request". I had a quick look just in case it was a trivial patch but the core does not use the SDRAM at the moment so it's ...

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