Search found 217 matches

by ExCyber
Tue Dec 07, 2021 12:40 am
Forum: X68000, PC88, PC98
Topic: X68000 Beta - Updates and Releases
Replies: 520
Views: 312074

Re: X68000 Beta - Updates and Releases

MadDog wrote: Mon Dec 06, 2021 11:24 pm Does anyone know what the 登録 key is mapped to?
I can't test it right now, but based on skimming the keycode ROMs I think it's Scroll Lock.
by ExCyber
Sun Dec 05, 2021 6:07 pm
Forum: Genesis / Mega Drive, Sega CD, 32X
Topic: Something wrong with genesis core? EU as default and slowdown?
Replies: 8
Views: 7585

Re: Something wrong with genesis core? EU as default and slowdown?

The positions of Header and File Ext swapped in release 20211126 to make Header the default, so if you had the setting saved as Header on an older version, upgrading to the latest version will switch it to File Ext (and vice-versa). You might just need to switch it back in the new version.
by ExCyber
Sat Dec 04, 2021 4:50 pm
Forum: Genesis / Mega Drive, Sega CD, 32X
Topic: Something wrong with genesis core? EU as default and slowdown?
Replies: 8
Views: 7585

Re: Something wrong with genesis core? EU as default and slowdown?

This sounds similar to what happens if the Auto Region option is set to "File Ext" and an NTSC ROM with a .MD extension is loaded. What is your Auto Region option set to, and what extension do your files have?
by ExCyber
Wed Dec 01, 2021 2:59 am
Forum: General Discussions
Topic: Renesas plans to ship small real low cost FPGA
Replies: 6
Views: 3653

Re: Renesas plans to ship small real low cost FPGA

The size of these devices seems hard to pin down without an proper overview of the architecture. In one place, the article says that "the first devices ship with 1K and 2K Look Up Tables". In another place, it says that the SLG47910V has an array "[e]quivalent to 900 4-bit LUTs". I'm not sure which of those is being equated to 5...
by ExCyber
Mon Nov 29, 2021 5:09 am
Forum: Sony PlayStation (PSX)
Topic: PS1 compiling the core...
Replies: 10
Views: 8084

Re: PS1 compiling the core...

The core is still somewhat immature/unstable and under very active development. Any build posted would likely be obsolete in a matter of days, if not hours. If anyone were to distribute RBF files, it would probably only make sense either as a totally impartial CI process or by way of the author asking for testing of specific revisions.
by ExCyber
Sun Nov 28, 2021 10:11 pm
Forum: Neo Geo MVS / AES / CD
Topic: Fatal Fury 3's Endings Are Broken
Replies: 7
Views: 7662

Re: Fatal Fury 3's Endings Are Broken

This is apparently a game bug:

https://mametesters.org/view.php?id=2404
by ExCyber
Sun Nov 28, 2021 9:33 pm
Forum: Sony PlayStation (PSX)
Topic: PSX Compatibility List
Replies: 183
Views: 92234

Re: PSX Compatibility List

I downloaded and compiled the latest core, the readme states CDs must be single track and EU region. Try US region, i couldnt get a single EU game to work. I don't think the "region only EU" line in the readme means that Europe/PAL games are required, but rather that the ID string fed to the system from the CD controller is always "...
by ExCyber
Thu Nov 25, 2021 6:45 pm
Forum: Neo Geo MVS / AES / CD
Topic: Freeze Playing with Keyboard?
Replies: 10
Views: 8359

Re: Freeze Playing with Keyboard?

This seems to be a bug in Metal Slug 3-5. You can push left+right all you want, but doing that and shooting or throwing a grenade locks up the game.

There might be a conversation to have about disallowing these input combinations by default since they tend to cause strange behavior.
by ExCyber
Thu Nov 25, 2021 4:47 am
Forum: X68000, PC88, PC98
Topic: X68000 Beta - Updates and Releases
Replies: 520
Views: 312074

Re: X68000 Beta - Updates and Releases

It's the weirdest fucking thing... I'm intermittently getting Directory not found now. It works sometimes and sometimes it doesn't. I have no idea what the hell is causing this... I can think of a couple things that might cause this behavior: 1) Insufficient power supply causing the drive to be unreliable. 2) Two file systems covering the same por...
by ExCyber
Wed Nov 24, 2021 11:14 pm
Forum: Development for MiSTer
Topic: Controller issue with core development
Replies: 5
Views: 4880

Re: Controller issue with core development

Yeah, it's a bit tough to reason about without more context. The only scenario I can imagine at the moment that doesn't seem completely off the wall is something along these lines: A CPU that vectors interrupts based on the data bus The inputs are applied to the data bus during the interrupt vector cycle One order of inputs happens to invoke the ex...
by ExCyber
Tue Nov 23, 2021 3:38 pm
Forum: Neo Geo MVS / AES / CD
Topic: Freeze Playing with Keyboard?
Replies: 10
Views: 8359

Re: Freeze Playing with Keyboard?

If the OSD still works and game sound continues to play, then the system as a whole isn't locked up. At the very least, the HPS is still running, the scaler is still generating HDMI output and accepting OSD input, and the core's sound subsystem is still running. I think this suggests one of: The scaler stopped processing core video input The core's...
by ExCyber
Sat Nov 20, 2021 1:48 am
Forum: X68000, PC88, PC98
Topic: X68000 Beta - Updates and Releases
Replies: 520
Views: 312074

Re: X68000 Beta - Updates and Releases

I've seen a couple claims floating around on the web that it's public domain, but I doubt that those are accurate. It's fairly common for people to misuse the term "public domain" for things that are still under copyright but have a license allowing redistribution by the general public.
by ExCyber
Sat Nov 20, 2021 12:02 am
Forum: X68000, PC88, PC98
Topic: X68000 Beta - Updates and Releases
Replies: 520
Views: 312074

Re: X68000 Beta - Updates and Releases

I've never heard of it being open-source, but I believe Sharp authorized noncommercial distribution of the X68000 ROMs and associated system software (e.g. Human68K and SX-Window) for use with emulators due to some user group activism. There's a document that appears to be a license text, although machine translation mangles it pretty badly, so it ...
by ExCyber
Tue Nov 16, 2021 3:42 am
Forum: Other Computer / System Cores
Topic: Apple II Core
Replies: 251
Views: 145253

Re: Apple II Core

The absence of color artifacts (...) was probably a deliberate enhancement by the original author. Yea, it is. He explains why and how he did it in the pdf. The thing I'm addressing at the moment is specific to the "mixed" modes, and I didn't see anything in the PDF describing it. Prof. Edwards might have decided that it wasn't important...
by ExCyber
Mon Nov 15, 2021 7:16 pm
Forum: Other Computer / System Cores
Topic: Apple II Core
Replies: 251
Views: 145253

Re: Apple II Core

The absence of color artifacts in the text part of mixed modes seems pretty straightforward and was probably a deliberate enhancement by the original author. I can't speak to the accuracy of the output, though (questionable eyes + using the scaler on a relatively old, budget TN monitor).
by ExCyber
Sun Nov 14, 2021 6:09 pm
Forum: Other Computer / System Cores
Topic: Apple II Core
Replies: 251
Views: 145253

Re: Apple II Core

At the moment, the keyboard code only handles single byte keycodes (as far as I can see). That complicates detecting the right ALT key , which is a multi-byte code: E0 11. That will require some extra work on the keyboard controller. I haven't tried this out yet, but I think the framework handles the E0 byte and sets ps2_key[8] to indicate its pre...
by ExCyber
Sat Nov 13, 2021 5:18 pm
Forum: Other Computer / System Cores
Topic: Apple II Core
Replies: 251
Views: 145253

Re: Apple II Core

Reset is currently mapped to the user button and LAlt+LCtrl+RAlt (by default; there are a few options in MiSTer.ini). I think on the original Apple II and II+ the reset key alone asserted the reset signal (which it does on the current core), while later models required the combination of Ctrl+Reset to prevent accidental resets (and Ctrl+open apple+...
by ExCyber
Sat Nov 13, 2021 3:27 am
Forum: Other Computer / System Cores
Topic: Apple II Core
Replies: 251
Views: 145253

Re: Apple II Core

2) The backspace should print a checkered square when pressed. Right now it is acting like the left arrow key. I'm torn on this. The Apple II keyboard layout is somewhat odd in that: 1) The left arrow key effectively is a backspace key (produces 0x08, used to correct typos) 2) The delete key (0x7F) is positioned where modern keyboards have a backs...
by ExCyber
Sun Oct 24, 2021 9:27 pm
Forum: Other Computer / System Cores
Topic: Apple II Core
Replies: 251
Views: 145253

Re: Apple II Core

I'm not sure about the details, but I think the scan code lookup table and character ROM built into the core are for a UK keyboard. SHIFT+3 produces a pounds sign instead of a number sign, for example.
by ExCyber
Thu Oct 14, 2021 10:49 pm
Forum: X68000, PC88, PC98
Topic: X68000 beta core preview - 10/14
Replies: 44
Views: 31483

Re: X68000 beta core preview - 10/14

The original author of the core has been releasing updates via his blog, and at some point it stopped requiring the secondary SD card. I'm not sure which of those changes have been merged into anyone's repo.
by ExCyber
Sun Oct 10, 2021 4:03 pm
Forum: Other Computer / System Cores
Topic: Apple II Core
Replies: 251
Views: 145253

Re: Apple II Core

That's nice, to me, I find the idea of the system simulating the spinning disk aesthetically pleasing. Though ideally, it should spin that disk, it shouldn't care what data registers the CPU looks at or anything, no hacks, no nothing -- if the 6502 doesn't read it in time, the byte is just lost. I assume that's what the real hardware does. 6502 wi...
by ExCyber
Fri Oct 08, 2021 2:10 pm
Forum: Other Computer / System Cores
Topic: Apple II Core
Replies: 251
Views: 145253

Re: Apple II Core

I don't think the SRAM framework is a great fit for floppies, especially on Apple II. The key thing is that there isn't necessarily a 1:1 relationship between program disk and save disk the way that there is for cartridge and SRAM. Some programs only save user data to the program disk itself, some only save to a separate save disk, and some can sav...
by ExCyber
Thu Oct 07, 2021 10:37 pm
Forum: Other Computer / System Cores
Topic: Apple II Core
Replies: 251
Views: 145253

Re: Apple II Core

I'd have thought, the thing going into 'track_memory' to tell it where to index would be the same for both read and write. Those expressions probably would be similar in a version of the code that supports floppy writes. As it is now, the write path exclusively handles the top-level core filling the track RAM with data from the image file, while t...
by ExCyber
Thu Oct 07, 2021 6:01 pm
Forum: Other Computer / System Cores
Topic: Apple II Core
Replies: 251
Views: 145253

Re: Apple II Core

The 'phase' stuff in here is pretty weird. Not sure what's going on. It's a simulation of the stepper motor that moves the head between tracks. In this context, "phase" is stepper motor jargon for a set of coils that are energized. The motor won't actually complete a "step" without an appropriate sequence of phases being energi...
by ExCyber
Mon Sep 27, 2021 10:16 pm
Forum: Arcade Cores
Topic: JT CPS 1.5 and 2 cores: No HDMI audio.
Replies: 2
Views: 1546

Re: JT CPS2: No HDMI audio

I used to have a similar problem with the Neo Geo core (although this was on an older PC monitor with internal speakers, not a modern TV). In that case, the problem was somehow tied to the change in display timings. Switching to another input and back or power cycling the monitor after loading the core fixed it. At some point it stopped happening; ...
by ExCyber
Sun Sep 19, 2021 4:41 pm
Forum: Sega Saturn
Topic: Sega Saturn Core in Development
Replies: 942
Views: 420178

Re: Sega Saturn Core in Development

Would the Sega Saturn core be interchangeable with the Sega ST-V games? [all assuming development goes as planned of course] ST-V has an extra I/O chip to handle the standard player/coin inputs rather than routing those through SMPC, so it's not just a matter of loading the right ROMs into a Saturn core. That being said, the chip in question seems...
by ExCyber
Mon Sep 13, 2021 9:28 pm
Forum: Sega Saturn
Topic: Sega Saturn Core in Development
Replies: 942
Views: 420178

Re: Sega Saturn Core in Development

I'm not aware of anything that actually runs directly from cartridge space). KOF and Ultraman? I haven't specifically looked at games, but Sega told developers to never store code in cartridges, and graphics/sound assets would need to be copied to an internal RAM before use. Action Replay obviously runs code stored on a cartridge, but I believe it...
by ExCyber
Sun Sep 12, 2021 6:45 pm
Forum: Sega Saturn
Topic: Sega Saturn Core in Development
Replies: 942
Views: 420178

Re: Sega Saturn Core in Development

I don't think the Saturn has that much RAM. Would likely be more about bandwidth than capacity Not just bandwidth, but the ability to have consistent access timings with the various concurrent things that are happening. There are 6 physically independent RAMs if I haven't somehow double-counted: CPU async RAM, CPU+SCU SDRAM, VDP1 RAM, VDP2 RAM, fr...
by ExCyber
Sun Sep 12, 2021 5:01 pm
Forum: Arcade Cores
Topic: TMNT, Simpsons, Sunset Riders - Konami core?
Replies: 20
Views: 13199

Re: TMNT, Simpsons, Sunset Riders - Konami core?

XtraSmiley wrote: Thu Sep 09, 2021 12:28 pm Battletoads was EA, not Konami though!
It's also based on TMS34020, which is a fairly complex chip that not many games used. I doubt we'd see it implemented before the TMS34010-based Williams/Midway hardware (which is a topic for another thread).
by ExCyber
Sun Sep 05, 2021 8:36 pm
Forum: Arcade Cores
Topic: TMNT, Simpsons, Sunset Riders - Konami core?
Replies: 20
Views: 13199

Re: TMNT, Simpsons, Sunset Riders - Konami core?

It seems like Konami did eventually sort of standardize on the GX System for their 2D games... just in time for the industry's big shift to PlayStation-based hardware. Before then, though, there was a lot of "remixing" of previous boards.