Search found 307 matches

by dmckean
Fri Jan 05, 2024 6:40 pm
Forum: Other Computer / System Cores
Topic: Groovy_MiSTer Core
Replies: 259
Views: 41364

Re: Groovy_MiSTer Core

Calamity wrote: Fri Jan 05, 2024 4:42 pm
Jeruro wrote: Fri Jan 05, 2024 1:39 pm

It would be nice to run GroovyMame on a Raspberry Pi next to Mister.

If you like small things, get a mini pc. Raspberry Pi won't cut it.

I wonder about this though. The Raspberry PI 5 single core performance appears to be roughly double the Intel Core Duo 2 E8400 setup I've been running Groovymame on for the last decade.

by dmckean
Sat Oct 28, 2023 5:01 pm
Forum: Sega Saturn
Topic: Sega Saturn Core in Development
Replies: 942
Views: 419155

Re: Sega Saturn Core in Development

I think it's all but confirmed now, but just to chime in .... upgrading my single 128MB ram from 2.5 to 3.0 (sourced from Mister Addons) made a ton of Saturn core issues go away. Nights now has music ... that was the first thing I tested :) maybe a faulty ram? Mine is 2.5 and Nights runs with music. It was discovered with memtest was created that ...
by dmckean
Fri Oct 20, 2023 8:10 pm
Forum: Sega Saturn
Topic: Sega Saturn Core in Development
Replies: 942
Views: 419155

Re: Sega Saturn Core in Development

I think you need at least version 2.5 of the 128mb RAM and preferably version 2.9.

2019 predates all those revisions of RAM.

by dmckean
Tue Oct 17, 2023 4:44 am
Forum: General Discussions
Topic: Analogue N64 Product
Replies: 32
Views: 14488

Re: Analogue N64 Product

I wish they were making a Sega Saturn FPGA instead since I don't think we'll see a functional Mister Saturn Core anytime soon.(maybe never) But I can see why they went with N64.it's a much more popular system. it's not for me,because most of N64's better games are remastered and available on better systems. They could even go for a Saturn+Dreamcas...
by dmckean
Mon Oct 16, 2023 8:32 pm
Forum: Other Console Cores
Topic: Virtual Boy
Replies: 30
Views: 23613

Re: Virtual Boy

Old Arcade games use a unique board per game, leading to these games having 1 core just for themselves. 1 core for 22 games isn't too absurd There's also a lot of arcade boards that will never get ported because the game was bad and there's no interest. Virtual Boy will get done at some point because it Nintendo from their best period. But it's go...
by dmckean
Mon Oct 16, 2023 5:49 pm
Forum: General Discussions
Topic: Analogue N64 Product
Replies: 32
Views: 14488

Re: Analogue N64 Product

dcubed wrote: Mon Oct 16, 2023 5:35 pm

MiSTer won't be able to offer features like Save States, Transfer Pak support or Overclocking,

I wouldn't bet on that.

by dmckean
Sun Oct 15, 2023 5:57 pm
Forum: PC 486SX (ao486)
Topic: Windows 95 with Internet?
Replies: 17
Views: 13606

Re: Windows 95 with Internet?

Bas wrote: Sun Oct 15, 2023 1:06 pm

The net is going TLS for just about everything nowadays. No browser on Win95 will support that.

I would assume he wants to browse sites from that era that are still online. But yeah, you can't browse modern sites using Win95.

by dmckean
Sun Oct 08, 2023 6:40 pm
Forum: General Discussions
Topic: The “Cycle Accurate” Conundrum and Is There a List of Cores That Are?
Replies: 78
Views: 18968

Re: The “Cycle Accurate” Conundrum and Is There a List of Cores That Are?

The PSX core could be more accurate by implementing the CD hardware faithfully and improving the timings on future FPGA hardware that doesn't have the same limitations as the DE-10 Nano. That's sure to happen at some point in the future, it should be remembered how young the PSX core is at this point when comparing it to PC emulators.

by dmckean
Mon Sep 25, 2023 12:14 am
Forum: General Discussions
Topic: The “Cycle Accurate” Conundrum and Is There a List of Cores That Are?
Replies: 78
Views: 18968

Re: The “Cycle Accurate” Conundrum and Is There a List of Cores That Are?

Fair enough. I notice the aurhor of MCL86 cleverly mentions the CPU is "cycle accurate but nof cycle exact" :mrgreen: But then I wonder how many emulators are cycle exact for the same CPU (if any). The truth often comes in shades of gray though. Would it be fair to say that cycle accuracy is a spectrum? With that metric, are FPGA cores i...
by dmckean
Sun Sep 24, 2023 4:45 pm
Forum: General Discussions
Topic: The “Cycle Accurate” Conundrum and Is There a List of Cores That Are?
Replies: 78
Views: 18968

Re: The “Cycle Accurate” Conundrum and Is There a List of Cores That Are?

The PCXT core is cycle accurate in its 4.77 MHz , 7.16 MHz, and 9.54 MHz modes, but is no longer cycle accurate at maximum speed (AT like performance). Not fully. Multiplication and division are not cycle accurate. Their behaviour is documented, but the creator of the CPU module went for ease of implementation rather than accuracy. See https://mis...
by dmckean
Fri Sep 22, 2023 10:29 pm
Forum: General Discussions
Topic: The “Cycle Accurate” Conundrum and Is There a List of Cores That Are?
Replies: 78
Views: 18968

Re: The “Cycle Accurate” Conundrum and Is There a List of Cores That Are?

rhester72 wrote: Fri Sep 22, 2023 1:50 pm
  • There's pretty much nothing you can do in FPGA that you can't do in software, except efficient mass-scale parallelization

The importance of this can't be understated.

by dmckean
Sun Aug 06, 2023 7:38 pm
Forum: Hardware Setups
Topic: Real Floppy Disk Drive for MiSTer FPGA Current Progress
Replies: 19
Views: 8490

Re: Real Floppy Disk Drive for MiSTer FPGA Current Progress

FPGA64 wrote: Sun Aug 06, 2023 7:26 pm

We already have it for the C64. HW exists to connect a real 1541

Support for a real 1541 is one thing because its controller has its own CPU and talks over a slow interface. Getting the C64 core to talk to a PC floppy drive would involve implementing that controller in the core and doing similar things that are being done with the Amiga support.

by dmckean
Tue Jul 25, 2023 12:23 pm
Forum: Neo Geo MVS / AES / CD
Topic: Neo Geo CPU Overclocking?
Replies: 103
Views: 86400

Re: Neo Geo CPU Overclocking?

Other games benefit too and more choice is always better.

by dmckean
Mon Jul 24, 2023 3:33 pm
Forum: Neo Geo MVS / AES / CD
Topic: Neo Geo CPU Overclocking?
Replies: 103
Views: 86400

Re: Neo Geo CPU Overclocking?

That's how users learn though and eventually they'll stop messing with things they don't understand. We can't just dumb down the entire project and not implement features that would benefit nearly everyone because a few people won't understand it.

by dmckean
Sat Jul 22, 2023 5:14 pm
Forum: General Discussions
Topic: Why Are So Many Cores Missing Horizontal & Vertical Position Settings for CRTs?
Replies: 16
Views: 5348

Re: Why Are So Many Cores Missing Horizontal & Vertical Position Settings for CRTs?

It's a bigger problem for arcade cores because the scan frequency can be way out of spec for TVs and RGB monitors. The console and computer cores really shouldn't have as many issues.

by dmckean
Fri Jul 21, 2023 5:21 pm
Forum: Display Devices
Topic: The Result of My Search for a Great MiSTer Display
Replies: 186
Views: 95835

Re: The Result of My Search for a Great MiSTer Display

Those panels are all very old though, there has been a lot of advancement in LCD technology in the last 14 years.

by dmckean
Fri Jul 21, 2023 4:40 pm
Forum: Other Console Cores
Topic: FPGA Sega Dreamcast?
Replies: 27
Views: 13179

Re: FPGA Sega Dreamcast?

PS2 emulation is still not perfect after all these years, which is kind of crazy to think about. In a way, FPGA would surely be faster than the 15+ years it took for the PS2 to have good but still imperfect emulation. Xbox emulation is still pretty bad, so the only one that is really good is Dolphin, in my opinion. I can't imagine the amount of wo...
by dmckean
Thu Jul 20, 2023 3:57 pm
Forum: Display Devices
Topic: The Result of My Search for a Great MiSTer Display
Replies: 186
Views: 95835

Re: The Result of My Search for a Great MiSTer Display

The last 4:3 panels were all manufactured in 2009 and have lots of issues compared to modern panels or any type.

by dmckean
Mon Jul 17, 2023 2:22 am
Forum: Development for MiSTer
Topic: How Difficult Is It to Add Vertical Flip to a Core?
Replies: 15
Views: 5239

Re: How Difficult Is It to Add Vertical Flip to a Core?

It's probably a pretty difficult project since blackwine and jimmystones have already gotten most of the low hanging fruit.

by dmckean
Fri Jun 30, 2023 2:06 pm
Forum: PC 486SX (ao486)
Topic: Replacement of ao486?
Replies: 25
Views: 11123

Re: Replacement of ao486?

Implementing operand forwarding into the current core would go a long way into making it behave and feel more like a real i486.

by dmckean
Tue Jun 27, 2023 3:54 am
Forum: Display Devices
Topic: MiSTerFPGA Y/C Out Module (Direct - S-Video / Composite Output) - Update
Replies: 157
Views: 35271

Re: MiSTerFPGA Y/C Out Module (Direct - S-Video / Composite Output) - Update

The Y/C cores mostly improve over the original implementation. The philosophy in general for video on this project is to improve it over the original. It's what most of us want here.

by dmckean
Sun Apr 30, 2023 4:54 pm
Forum: Display Devices
Topic: MiSTerFPGA Y/C Out Module (Direct - S-Video / Composite Output) - Update
Replies: 157
Views: 35271

Re: MiSTerFPGA Y/C Out Module (Direct - S-Video / Composite Output) - Update

netbeui wrote: Sun Apr 30, 2023 3:32 pm

Hi I ordered a composite/s-video board from Antonio back in July 2020. Does anyone know if this board should work with the YC cores? I configured the ini and tried it on a CRT and a PVM but I don’t get a signal on composite or s-video

IMG_6581.jpeg
IMG_6580.jpeg

It will not.

by dmckean
Wed Apr 19, 2023 5:40 pm
Forum: Display Devices
Topic: MiSTerFPGA Y/C Out Module (Direct - S-Video / Composite Output) - Update
Replies: 157
Views: 35271

Re: MiSTerFPGA Y/C Out Module (Direct - S-Video / Composite Output) - Update

Been looking into this now since i picked up a small crt monitor that only has s-video input. Do i need a special convertor? I tried a small adaptor from amazon that you plug the vga cable from the i/o board into, then use an svideo cable from that to the monitor. I made the changes to the ini but i dont get any picture at all, no menu etc nothing...
by dmckean
Mon Apr 17, 2023 4:21 am
Forum: Linux
Topic: Release DE10 Nano Overclock Kernel BETA
Replies: 202
Views: 82357

Re: Release DE10 Nano Overclock Kernel BETA

Is there a test you can run to see if it improves PSX core sound latency? It's sort of crazy these settings have never been played with until now.

by dmckean
Sun Apr 16, 2023 11:55 pm
Forum: Linux
Topic: Release DE10 Nano Overclock Kernel BETA
Replies: 202
Views: 82357

Re: Release DE10 Nano Overclock Kernel BETA

I messaged Robert and he's now aware of it and will keep it mind as he's developing the N64 core :) Actually I came back to this because I heard the big news about the N64 core and that he was using the DDR3. Apparently the DDR3 has plenty of bandwidth for the N64 core, but latency might be an issue, especially given the shared nature of the memor...
by dmckean
Tue Apr 11, 2023 7:21 pm
Forum: General Discussions
Topic: So Robert Peip (FPGAzumSpass) Is Working on a New Core...
Replies: 185
Views: 29248

Re: So Robert Peip (FPGAzumSpass) Is Working on a New Core...

I understand that if Robert only want to do console, it's logical to do the fail console after the good one when nothing left, which is the case now. My bet is on the jaguar, but i hope for the 3DO because as i said there still a few correct things in this console. ... And I wouldn't agree that only fail consoles are left. There are still some lef...
by dmckean
Mon Mar 20, 2023 3:32 am
Forum: General Discussions
Topic: So Robert Peip (FPGAzumSpass) Is Working on a New Core...
Replies: 185
Views: 29248

Re: So Robert Peip (FPGAzumSpass) Is Working on a New Core...

The whole secrecy thing is annoying. He said it’s in case the core isn’t doable but he announced PSX knowing it may not be doable. Makes no sense. He had already been working on PSX for almost three months before he announced it. He had already written a number of tests to gauge its feasibility and he only had a few concerns (you can watch his You...
by dmckean
Sat Mar 18, 2023 8:15 pm
Forum: General Discussions
Topic: Is it possible to make a MiSTer frontend via a front end core?
Replies: 25
Views: 3794

Re: Is it possible to make a MiSTer frontend via a front end core?

No, this is never happening.

Any launcher made as a core is going to end up being extremely disappointing. At least the OSD is usable.

by dmckean
Fri Mar 03, 2023 8:04 pm
Forum: PC 486SX (ao486)
Topic: Replacement of ao486?
Replies: 25
Views: 11123

Re: Replacement of ao486?

There would be nothing minimal about this effort even if it's already written. Everything in the PCXT core was already written and it still took 6 months for it to be put together and debugged.