MiSTer FPGA Forum

I own a Sony KV14LT1E (German model) and it works fine with Mister. Both 50Hz and 60Hz picture is stable and the menu includes a setting to shift the RGB input horizontically, which is useful. Please note that Trinitron sets do not like high voltage on the Sync signal, and you may need to add a resistor to your VGA->SCART cable. See https://www.ata...

Please feel free to post any questions here or on the YouTube video comments, we will aim to answer them as soon as possible. Hi. Will the analog audio out be fed by a proper DAC (that takes the data from the same source as the optical out)? I am asking because the audio out on the MiSTer IO addon board has a very noisy output and this could be mu...

Each arcade core chooses what MRA files are to be installed with it by placing them into the corresponding "release" subfolder on github. The update scripts simply download that. The update scripts can remove old cores (they have a date in their filename and when a newer file is there, they can check for older ones), but have no way to de...

The network is managed by the ARM core. It cannot "see" the second sdcard, as it is connected directly to the FPGA pins. See also viewtopic.php?f=29&t=3090

You can try to find a mode that works for your monitor. This is 1240x1024@60
This would require a hsync of 63.60 kHz which would fit your monitor specs.

This is the mode for 2560x1080@60 but I think this is exceeding the limits of the fpga. Try at your own risk.

No, you are not missing anything. With 640x480, your monitor scaled the picture to full screen. Black bars are the result of integer scaling (so that every pixel stays the same size) - depending on the resolution of the image from the core you are playing, this might not fit properly into 1600x1200 if multiplied by an integer. You can see the origi...

If you run an LCD monitor below its native resolution, you are limited to the scaling capabilities of the monitor electronics. MiSTer has much better scaling, with many options to tweak it to your liking. MiSTer also has a lot of filters available, and many of these only work correctly if the display is run at the native resolution.

MiSTer has the parameter. When it is active, 15 kHz signals get line-doubled to 31 kHz. In the OSD you can then choose from 25%, 50% or 75% "blank" depending on your preference.

If you have a VGA CRT monitor, there is no need to set a resolution for most cores. By setting forced_scandoubler=1 almost all cores will create a 31KHz (or higher) signal, that will be shown on the CRT. For the few cores that lack scandoubler support and the arcade cores that are in vertical orientation, you can use vga_scaler=1 with a resolution ...

Thanks. I was thinking that the OSD BIOS option should be used to disable the Basic ROM. It now starts

When I tried, it would not even start with the Basic BIOS enabled. What version did you use?

Hi,

I am trying to run Yoomp! (http://yoomp.atari.pl/download.htm) on this core. I tried all kinds of RAM and BIOS settings, but it always crashes the core after the second loader (with white background). Has anyone run this game successfully?

That's obviously very personal, depending on one's childhood etc. but I would love if any of those was implemented : - Thomson MO5 / TO7 ("plan informatique pour tous", those machines were in all schools in France in the mid 80s, so there were some interesting stuff written for them...) Well... https://misterfpga.org/viewtopic.php?t=1543...

My PC VGA CRT Monitor will NOT work on almost any of the cores that output low resolutions like a ZX Spectrum, C64, Amstrad CPC, NES, etc..... unless I use vga_scaler=1 - but then you are not getting the stock native output of the core, you are scaling it. The setting forced_scandoubler=1 allows you to use a VGA CRT with almost all cores without t...

Worked fine here as well. Using 7-zip 20.00.

Amazon.de has one for less than 2€ shipped (with prime). I use it with a 3€ DAC from aliexpress.

https://www.amazon.de/gp/product/B07TJJ57NB/

I am sure you can find similar cheap cables locally on ebay or amazon.

dmckean wrote: ↑Mon May 03, 2021 9:35 pm Definitely not great for 15khz NTSC displays. A line tripled mode for PC CRTs would be alright.

Yes, with a VGA crt, this could work with the VGA scaler:
No need for the core to do anything special in that case.

There are PC/XT cores for the ZX Uno FPGA - maybe they could be used as a starting point. See https://www.zxuno.com/forum/viewforum.php?f=56

I have applied this to a fresh mister.ini, with mixed results. Without any tweaks the image is narrow, with OSD's Full Screen it fills the screen but scaling is flawed (can see it on text in games, otehrwise it can look deceptively good). I can actually get a proper scaling using Wider HV-integer and then stretching image horizontally on my monito...

akeley wrote: ↑Thu Apr 22, 2021 8:32 pm Could you post your settings?

I use
As no scaler is used, video_mode should not be relevant. Mine is a custom 1152x864 resolution.

Looks like in this foto. Both with the latest core from the mister github and the "keys" fixed build from discord.

Regarding PC VGA CRT display, I've tried it again and it does work, but the scaling is off - on both old cores, as well as the latest scandoubled one. At least on my generic VGA config (which works with most other cores). I use a VGA CRT and used a ruler to measure the aspect ratio of the output of the latest test build (with fixed keyboard input)...

That is the error. Scandoubler creates a 31KHz signal for VGA monitors, you need to set it to 0.

Are you using forced_scandoubler=1 in your ini file by chance? Or switched the scandoubler osd option to anything other than "none"?

I now use an LCD that is turned 90° for the vertical cores (I have shown you my setup on discord). The setup is much simpler now.

Sadly these are not working here, the graphics are very corrupted. Re-copied it multiple times, used update_all multiple times to redownload the ROMs, no difference. You might want to try to delete the old Druaga core. That made Super Pac-Man start in my setup after update-all got the Mame roms. But there is no sound, scandoubler does not work and...

There are python scripts for all OS: viewtopic.php?p=19019#p19019
and there is the "Virtual Floppy Image Converter" from https://www.vector.co.jp/soft/win95/util/se151106.html (Windows)

That is perfectly normal. The mode line I gave is for a 31KHz VGA signal.

DOS VGA text mode is 720x400, and that does look squished like in your picture when scaled to a 640x400 resolution (you can improve the readability with the interpolation filter in the OSD). When running a game, resolution switches to 320x200 and all is fine.

Hi, I think you got all the important facts right. In my setup with both a VGA CRT and a TFT (for "tate" arcade games), I use the following mode with the CRT connected to analog I/O. It should also work with direct_video. [ao486] ;use with external filter "interpolation sharp" for readable text vga_scaler=1 video_mode=640,24,96,...

You can find it in the first link in the signature from Grabulosaure. I think it is http://temlib.org/pub/mister/Intv.rbf