Re: Atari Lynx Core
Posted: Sat Mar 20, 2021 2:11 pm
You need to enable "240p mode" in the menu to make the image larger. Though I'm curious about the erratic part and if it still stays erratic after enabling.
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Yeah I am seeing the same thing on my VGA MoniVision Presentation display at 31Hz. It's almost like every other line horizontally is shifting quickly left and right causing a "fuzzy" look. I noticed if you turn on the scandoubler and turn up the scanlines to either 50% or 75% it fixes it or "hides it"FoxbatStargazer wrote: ↑Fri Mar 19, 2021 4:47 pm I'm getting some weird analog output on my VGA CRT via the Analog I/O board (not direct_video). I've got the forced scandoubler on, and I use the 240p mode setting in the core menu. The entire screen appears wavy, like every other line is shifted slightly left or right, although it is stable like this it appears rather fuzzy. This even applies to the OSD. It goes away if I use the HQ2X scandoubler mode and only that one, its fully present with scanlines or off. This might be because the total pixel clock is a bit low or something, only 408p tall? I know I can get around it with vga_scaler on a vga monitor but thought I would bring it up.
No, vga-scaler 0 - its on my CRT TV. It was very small till i changed it to 240p option.Jegriva wrote: ↑Sat Mar 20, 2021 12:23 pmAre you using Vga_scaler=1?metalfacemark wrote: ↑Fri Mar 19, 2021 4:43 pm great job on the core - the 240p mode works briliantly on my CRT TV.
Via natural analog I get a minuscule erratic image on my CRT. (Consumer television, not cathodic pc monitor).
Please send me the HBlank IRQ demo so i can debug the core with it.LamerDeluxe wrote: ↑Sat Mar 20, 2021 11:11 am When testing a color trick demo, which changes the palette every scan line, racing the beam with horizontal blanking interrupts, you can see that the timing doesn't match that of a real Lynx, possibly because of the non-standard frame rates of the Lynx.
The turbo option often doesn't have an effect, but when it does it is often way too fast. It would be great if it could be set in steps. I'd personally love to see a 24Mhz option that speeds up everything, including audio and timers, so it could be used to develop something for real Lynxes with 16 Mhz to 24 Mhz overclocking (I have an overclocked Lynx). 24 Mhz was the original clock speed of the Lynx, lowered to increase battery life.
I've made some small Lynx demos that use flicker transparency effects. The display of an original Lynx is very slow and blends about three subsequent frames together. The popular physically released home-brew game Zaku uses this effect as well. I'd love to see an option in the core to blend at least two frames, if possible. This could also make the games look more smooth.
I have a couple of loose demos that would be handy for testing. I'll have to convert them to .lnx files. I'll look into it tomorrow.FPGAzumSpass wrote: ↑Sat Mar 20, 2021 6:10 pm Please send me the HBlank IRQ demo so i can debug the core with it.
That would be great. For instance for Warbirds and Toki.For 24Mhz mode: i plan to add Turbo/Fastforward speed select. Currently it's 400%, but i will also do 50%, 100% and 200%.
My small Lynx demos can be downloaded from my Demozoo page here:Interframe Blending could be added. If you have a demo to test, please also send me.
by 'my' script, I meant the script on my MiSTer. my mistake.jca wrote: ↑Fri Mar 19, 2021 3:40 pmNo, just too exited to try a new core like many of us are. Not being near my MISTer I had time to RTFM.MiSTerEggman wrote: ↑Fri Mar 19, 2021 3:11 pm im a moron lol... thanks
just surprised my script didn't do its thing that is supposed to cover that
Are you the author of the BIOS getter script? In the affirmative shame on you, you may have killed some baby seals.
Good news/bad news on that. The good news is, boot1.rom/boot2.rom works; the ROM loads at startup time. The bad news is, whatever was happening before that fixed my picture when a ROM got loaded, it isn't happening anymore; I assume a core update somewhere along the line broke it. Now no matter what ROM I load, I end up with a picture that's rolling, wavy, or misaligned. I've tried adjusting settings, includingV-sync and H-sync and 240p mode; no luck.