Posts made by Scandy

@haricot Cela pourrait être bon?

@haricot thank you for your answer but still it's not clear to me this: in config.txt it is like setting first hdmi_mode=87 and then hdmi_mode=6, right?
So shouldn't the latter declaration (mode 6) disable the first (mode 87)? Or can I set multiple hdmi_modes at once?

@archimage said in Recalbox sur TV CRT en RGB:

@haricot voici un extrait de mon tuto express :

dans config.txt vérifie que tu as bien ces lignes

hdmi_cvt=1920 240 60 1 1 0 0
hdmi_disable_edid=0xa5000080
hdmi_pixel_encoding=2
avoid_safe_mode=1
disable_overscan=0
hdmi_drive=2
hdmi_group=1
hdmi_mode=6
hdmi_force=1

le mode 6 doit être activé pour emulationstation, non le mode 8 ensuite il faut que le mode 87 soit défini dans la résolution de Retroarch comme écrit plus haut...

Ces paramètres ont résolu mon problème, merci beaucoup!!!
Mais ils ont augmenté mes doutes.

Pourquoi spécifier hdmi_cvt=1920 240 60 1 1 0 0 si après vous définissez hdmi_mode=6? il est vrai qu'ils sont deux paramètres équivalents et exclusifs (l'une avec l'autre)?

Merci

@haricot @archimage I have the same issue with my Lindy HDMI > VGA Adapter.
No problems with a "standard" 240p@60hz resolution but I can't set any custom video mode in config.txt.
For the same reason I don't get native games resolution in AdvMAME.
I'll check these settings too... thanks!

@Substring I had this issue also on AdvanceMAME 3.0 with HDMI and Composite, and Andrea fixed it. I suppose he is aware of this strange behavior, and probably he will fix it after the holidays.

Meantime, try to set in advmame.rc the value sync_resample emulation, it worked for me as workaround.

P.S. Speaking of resolution on RPi, we should follow (and also support) this interesting request.

@Substring thank you very much for your advice (and for your constant support) I've yet manually configured my monitor (crt TV) in advmame.rc but it seems an issue related to HDMI > VGA adapter I'm using (I can't even run videomodes in advcfg). I'll check with the GPIO-VGA when I'll receive it.

I'm testing the 3.1 RC and it's great: Andrea fixed many little things, and audio and vsync are now perfect, as the UI.

BTW I've checked both the HDMI > VGA > SCART output and the Composite output and let me say that... to me, lag brought by my Lindy HDMI > VGA is consistent.

Ryuuko no Ken (Art of Fighting) in Composite is much more reactive, I hardly feel the difference with the real CMVS. Can't wait to test the VGA shield on the same aspect.

On the other hand, seeing AdvanceMAME in pure RGB at 240p@60hz (fixed, for now) is impressive.

I smile thinking about how emulation on RPi was different just some time ago. Who knows what the future holds!

@gkralicek2 @ian57 @Substring thank you for your help!
Adding a male - female VGA cable between the HDMI > VGA adapter and Retrocable VGA > SCART fixed it (of course I've also setup config.txt).
Now I have a perfectly clear RGB picture on my good old crt TV.

Unfortunately, it seems that real time resolution switch does not work in AdvanceMAME using the HDMI > VGA adapter (I only get a black screen... l'll write to Andrea).

So I still wait for the GPIO - VGA from Malaysia...

P.S. If someone's interested, I found how to use Unibios in AdvanceMAME.

@gkralicek2 thank you very much for your feedback.
Yes, the USB was connected, but in config.txt I only set hdmi_safe=1.

I'll check with

hdmi_group=1
hdmi_mode=6

Thanks!

Ok guys, I need your help.

RPi3 > HDMI to VGA > OK! (on a LCD monitor)

but

RPi3 > HDMI to VGA > VGA to SCART (from Retrocable.es)

...I get only a black picture.

My crt TV seems to recognize that there is some kind of signal, but I only get a black picture. What I'm doing wrong? :_(

Thanks.

@aTg said in Recalbox sur TV CRT en RGB:

@Scandy That already exists, the rpi2scart ... (A bit expensive the truth)
He thinks that I am alone, I can not launch so many projects at the same time.
I had an idea about this that you are telling me, so that it was not the same as everything I had thought of including in the design a box for the RPi in the form of a console, its connector scart on the back and the DB15 in front, with button of power and reset.
But it's just an idea.

@gkralicek2 If there are, I already have a prototype working.

A board with the same form-factor of RPi, placed on top of it (like a "shield") with female SCART and DB15 controllers... hmmmmmm!

@aTg a RGB-Pi with female SCART and one (or two) DB15 female controller ports would be definitive, IMHO.

@Substring said in Recalbox sur TV CRT en RGB:

The info has to be processed by the onboard chip, send the right info through the usb, then processed by the usb-hid kernel module, udev/sdl2 then emulator

So, forced to only one choice, you'd rather use the GPIO for video or controls?
IMHO the delay generated by an HDMI>VGA converter is more sensitive than that induced by USB hardware.
I do not take into account the delay caused by the emulator/SDL because it would be present in both cases.

@gkralicek2 said in Recalbox sur TV CRT en RGB:

Le VGA n'est pas directement acquis auprès du GPIO puisqu'il faut un réseau de résistance (R-2R ladder) entre la sortie GPIO et le connecteur VGA. Par contre il est vrai que cette méthode n'induit, sur le papier, pas de latence d'affichage comme c'est le cas avec un convertisseur HDMI-VGA (DAC). Dans la pratique et pour avoir comparé les deux longuement, la latence est quasi imperceptible pour peu que le convertisseur HDMI->VGA soit de bonne qualité. Après l'usage du GPIO présente certaines limitations concernant le nombre de couleurs affichables simultanément (codage couleur sur 6 bits par canal donc 18 bits au total soit 262144 couleurs max). Pas vraiment gênant en soi pour des jeux retro utilisant rarement plus de 65536 couleurs à l'écran :=). Par contre l'adaptateur GPIO->VGA monopolisant un grand nombre de broches sur le GPIO, il n'en reste plus assez pour pouvoir connecter des sticks arcade en montage dans un bartop par exemple. La connexion de manettes en USB générant plus d'input lag dans les jeux qu'un stick arcade branché en GPIO (dans les jeux de type Vs fighter c'est flagrant), perso je préfère reserver l'usage du GPIO pour les contrôleurs jeux et sortir du RGB à partir d'un convertisseur HDMI-VGA de qualité avec une latence d'affichage quasi-nulle :=)

Il serait intéressant de faire des test "scientifique" dans le "monde réel", pour évaluer l'existence de:

• convertisseurs HDMI > VGA presque lagless
• arcade stick USB presque lagless (utilisés dans le tournois EVO?)

En outre, le retard induit par le port USB dépend souvent du OS et par l'UI. Je lis quelque part (Shmups forums?) que les ports USB en Linux sous CLI sont pratiquement lagless.

@david-rose HDMI > VGA est une conversion de digital en analogique qui introduit un certain retard vidéo.
Avec le VGA acquis directement auprès GPIO ce retard ne devrait pas être là.

@aTg thank you for sharing this, but I really hope to have the possibility to buy soon a cable assembled by yourself.
IMHO a "female" SCART would be more practical.

@ian57 I suppose it's because now in AdvanceMAME are included also AdvanceMESS and AdvanceMENU (previous version was at 2.9). I'm curious to read about tests with VGA and SCART. Thank you.

@Substring @ian57 @aTg finally AdvanceMAME 3.0 with official Raspberry Pi support has been released. ;D

@Substring please take a look to private chat.

Cependant: encore un peu de patience...

@ian57 @Substring so AdvanceMAME should work out-of-the-(recal)box.

@ian57 @Substring no need to manage all resolution configs, at least for Arcade. AdvanceMAME now can manage videomodes on Raspberry Pi exactly as it does for Linux and DOS.
As you can read in my previous posts here, I thought from the beginning that AdvanceMAME would be the perfect "companion" for the findings on this great forum. So I wrote to Andrea some time ago pointing to this thread and various threads on RPi official forums, we started a long conversation by mail and he was so kind to support my stalking buying a Raspberry for the cause.
He is still optimizing the code, but yet the real time resolution switch does it work on RPi via HDMI (I'm still waiting for VGA Shield from Aliexpress). But I really hope that Andrea will write by yourself about his gem.
Resolution switch happens by vcgencmd.