Author Topic: Retromini RS-90 (JZ4725B) gba micro handheld  (Read 84941 times)

ace9094

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Re: Retro mini RS-90 gba micro handheld
« Reply #480 on: February 10, 2019, 10:32:56 pm »
YAY... Great news, cant take it off my daughter now, however can upgrade it and put more games on she likes :)

Thanks look forward to it :)
Dingoo x2, GCW0, RS-97 x2, Revo-K101, RS-90, PSP, PSP Go, GameGadget, New 3DS 128GB, PS Vita 200GB RS-45, Gamebox Advance and a few other obscure devices

lemmywinks

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Re: Retro mini RS-90 gba micro handheld
« Reply #481 on: February 11, 2019, 03:40:39 pm »
Excellent stuff, great to see some progress on this little handheld.
Handhelds:
GPD Win, GPD XD 64gb, Pap KIII-Plus, RS-97, RS-90, New Bittboy, 3DS XL, DSi XL, GBA SP, GBBC Clone, Gameboy Pocket, PSP Go,
PC:
HP Envy M6, Acer 522, Dell Mini 9
Psion 5 & 5MX
Tons of other old laptops and tablets.....

Great Crippler

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Re: Retro mini RS-90 gba micro handheld
« Reply #482 on: February 14, 2019, 10:50:57 pm »
Ok, I now have this and the new Bittboy. Which will get a user friendly custom linux OS first so I can get my PCE groove on? :-P

davidgilmour

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Re: Retro mini RS-90 gba micro handheld
« Reply #483 on: February 15, 2019, 07:04:09 am »
Ok, I now have this and the new Bittboy. Which will get a user friendly custom linux OS first so I can get my PCE groove on? :-P
I think the new bittboy!


Great Crippler

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Re: Retro mini RS-90 gba micro handheld
« Reply #484 on: February 15, 2019, 08:54:42 pm »
Yea, my soldering skills are ok. Just too small an area inside the RS-90 and the Bittboy for me to be comfortable messing around inside.

kryswade

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Re: Retro mini RS-90 gba micro handheld
« Reply #485 on: March 04, 2019, 12:30:54 pm »
any news? My rs-90 is patiently waiting.  ;D

PauloDybala

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Re: Retro mini RS-90 gba micro handheld
« Reply #486 on: March 05, 2019, 01:12:55 pm »
At this point I've kinda given up on this thing, I just regret spending money on this dead horse instead of the 97 but whatev

Great Crippler

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Re: Retro mini RS-90 gba micro handheld
« Reply #487 on: March 06, 2019, 07:16:39 pm »
I imagine something will release sooner or later. I'd love to be able to get more out of this little thing. But yea, development has been slow. Since I can't develop for it myself, I sit back, and try to be patient. :-D

adventureFAN

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Re: Retro mini RS-90 gba micro handheld
« Reply #488 on: March 07, 2019, 06:44:10 am »
Ok, I now have this and the new Bittboy. Which will get a user friendly custom linux OS first so I can get my PCE groove on? :-P
I think the new bittboy!


Wich emulators run fine? And whats about L+R Button? Or the C-Button on the Mega Drive gamepad?

Jutleys

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Re: Retro mini RS-90 gba micro handheld
« Reply #489 on: March 07, 2019, 09:03:32 am »
Hi all there is only (V2 Bittboy) now to get a 20% discount for a limited time offer only
order here stock will be arriving this week according to Bittboy
use the  code "happy2019" on checkout to get  %20 OFF

http://retromimi.com/?aff=5


My fan Website for the bittboy (find all cfw & mod downloads here)
https://jutleys.wixsite.com/bittboynew4u<>


Bittboy CFW video review https://youtu.be/v_v4KEzfk68 thanks to IAmVianca

Join my Discord channel for all bittboy support and all other retrogame handhelds
https://discordapp.com/invite/5qbZKsm (remember to react to the tick mark to gain access :)


All my other fan websites
https://jutleys.wixsite.com/retrogamers97-90/home/<>
https://jutleys.wixsite.com/bittboynew4u<>
https://jutleys.wixsite.com/gpd-gamers/home/<>
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https://jutleys.wixsite.com/handmade01/home/<>

Great Crippler

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Re: Retromini RS-90 (JZ4725B) gba micro handheld
« Reply #490 on: March 10, 2019, 07:58:01 pm »
Since the last post is literally an advertisement for a different handheld... LoL... I am still holding out hope for a CFW I can install on this.

Surkow

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Re: Retromini RS-90 (JZ4725B) gba micro handheld
« Reply #491 on: March 10, 2019, 08:18:28 pm »
Custom firmware might be a misnomer. This device isn't getting a modified "custom" firmware like the RS-97. Rather, the hardware needed to be reverse engineered. This consisted of deciphering LCD and memory timings, porting the bootloader, writing drivers and getting most of the changes upstream. None of the recent devices receiving a custom firmware had to go through that. If OpenDingux ever gets ported to the RS-97 it won't depend on the existing source code dump of the manufacturer. At most you could pull the LCD timings for one of the multitude of screens from the sources. Currently a KMS driver is being written to be able to move away from the age old framebuffer which isn't supported in newer generations of software and the Linux Kernel. After that you can expect userspace development to happen. Right now this isn't a priority.

Great Crippler

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Re: Retromini RS-90 (JZ4725B) gba micro handheld
« Reply #492 on: March 16, 2019, 05:32:48 pm »
Well, as my Bittboy literally fell apart on me, this is now my go to take it with me handheld again. Here's hoping for something I can install on it sooner than later.

gameblabla

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Re: Retromini RS-90 (JZ4725B) gba micro handheld
« Reply #493 on: March 16, 2019, 05:40:57 pm »
Well, as my Bittboy literally fell apart on me, this is now my go to take it with me handheld again. Here's hoping for something I can install on it sooner than later.
If you want something with a CFW, then just get an RS-97 or LDK rather than the RS-90 because it is going to take a while.
(They merged the DRM, ADC, Sound and LCD bits but they are still some other things missing.)

If you want to see what they did, see their commits here :
https://github.com/OpenDingux/linux/commits/jz-5.0-retromini

pcercuei

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Re: Retromini RS-90 (JZ4725B) gba micro handheld
« Reply #494 on: March 16, 2019, 07:12:39 pm »
They merged the DRM, ADC, Sound and LCD bits but they are still some other things missing.
From the kernel part it's mostly ready, everything works.
Now I'm working on an installer/flasher, and at the end I will work on the UI.

gameblabla

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Re: Retromini RS-90 (JZ4725B) gba micro handheld
« Reply #495 on: March 16, 2019, 09:52:14 pm »
Now I'm working on an installer/flasher, and at the end I will work on the UI.
Ah, that was my impression. I thought like missing was missing but no.
Pretty sure you are going to reuse Gmenu2x.

Btw, it comes to me right now that the kernel will only have a DRM/KMS interface available.
The RS-90 doesn't have a 3D GPU, which means no port of SDL2, the only one to directly support KMS.
And SDL 1.2 only supports fbdev, not DRM/KMS. (though it should still work if fbdev emulation is enabled)

So have you guys actually thought about that ? Are you just going to rely on fbdev emulation ?
I guess a basic SDL2 port to fbdev/framebuffer would be nice (as shown by the nxdk guys here) because it might not be as optimal as one would liked

pcercuei

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Re: Retromini RS-90 (JZ4725B) gba micro handheld
« Reply #496 on: March 16, 2019, 10:07:02 pm »
SDL2 does not require a GPU, it has a software renderer too.
SDL1 can just work on top of fbdev emulation, yes.

gameblabla

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Re: Retromini RS-90 (JZ4725B) gba micro handheld
« Reply #497 on: March 17, 2019, 06:50:32 am »
SDL2 does not require a GPU, it has a software renderer too.
It does through DirectFB ? Because at least it doesn't seem to work over /dev/fbdev and i was under the impression that it didn't over KMS either.
I knew it had a software renderer, i'm just not sure it supports KMS with software rendering currently. But looks like i'm wrong ?

Quote
SDL1 can just work on top of fbdev emulation, yes.
Hmm i guess a DRM video backend is something that could be looked at but it's probably not a priority. (i assume that you are still going to use SDL 1.2 for the UI ?)
« Last Edit: March 17, 2019, 06:54:09 am by gameblabla »

pcercuei

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Re: Retromini RS-90 (JZ4725B) gba micro handheld
« Reply #498 on: March 17, 2019, 11:59:44 am »
I didn't do tests with SDL2 right now - maybe the software renderer doesn't work with KMS, but it would be strange, the video output and the renderer should be independent.

For SDL1, what's the interest in having a KMS driver? Using fbdev emulation will work just as good.

Great Crippler

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Re: Retromini RS-90 (JZ4725B) gba micro handheld
« Reply #499 on: March 17, 2019, 01:54:08 pm »
Well, as my Bittboy literally fell apart on me, this is now my go to take it with me handheld again. Here's hoping for something I can install on it sooner than later.
If you want something with a CFW, then just get an RS-97 or LDK rather than the RS-90 because it is going to take a while.
(They merged the DRM, ADC, Sound and LCD bits but they are still some other things missing.)

If you want to see what they did, see their commits here :
https://github.com/OpenDingux/linux/commits/jz-5.0-retromini

Been there done that with the RS-97. I didn't care for the build quality on them either. I'm also kind of tired of waiting on Chinese shipping, so barring a cheap US seller, meh. Not really up for dropping 60+ on the LDK to risk another cheap PoS. I'm not short on things to play, I just don't have a good CFW handheld to take with me day to day. For now the RS-90 as-is, and my SP with an Everdrive will have to do.