Author Topic: RS90 in a GBA SP shell?  (Read 3854 times)

v47

  • Posts: 147
Re: RS90 in a GBA SP shell?
« Reply #20 on: October 13, 2019, 01:16:33 pm »
Yes. The default button mapping is slightly different from the RetroMini, and if it does not allow you to control the game properly out of the box, you are out of luck - the first victim being Chrono Trigger, no button will allow you to access the menu, and as you can't remap, you are done. The few GBA games I've tried seemed fine, but as always, your mileage may vary.

I'd say grab one if you like the format and it's $25 or less, stick it in the drawer and hope for the cfw.

v47

  • Posts: 147
Re: RS90 in a GBA SP shell?
« Reply #21 on: February 29, 2020, 06:10:48 pm »
So.. Any luck with the CFW, @pcercuei?

pcercuei

  • Posts: 1643
    • My devblog
Re: RS90 in a GBA SP shell?
« Reply #22 on: February 29, 2020, 07:53:51 pm »
I got stuck at trying to get the LCD to work, and gave up to work on other things.

v47

  • Posts: 147
Re: RS90 in a GBA SP shell?
« Reply #23 on: March 01, 2020, 09:50:20 am »
For now, or forever?

pcercuei

  • Posts: 1643
    • My devblog
Re: RS90 in a GBA SP shell?
« Reply #24 on: March 01, 2020, 08:41:12 pm »
Unless someone else gets the screen to work, that means most likely forever, sorry.

v47

  • Posts: 147
Re: RS90 in a GBA SP shell?
« Reply #25 on: March 02, 2020, 03:53:21 pm »
Ah well, can't have it all. Not too important I suppose, as currently, a v3.5 BittBoy is cheap enough to make anything else in the $30 price range pretty much irrelevant. Thanks for the effort.

I guess I still would be willing to throw my last remaining unit at whoever would want to have a shot at helping you out (and needs to take the device apart) - if there is someone like that out there, feel free to post here or send me a pm.

Zereth

  • Posts: 40
Re: RS90 in a GBA SP shell?
« Reply #26 on: March 15, 2020, 09:54:19 am »
Look, I'm a noob and this is possibly a dumb question... but I'd rather ask:
Would swapping the display for a known one help?

I mean, we can use the Sony DSC-WX300 screen with both the LDK and the RG300, using the LDK FW. I'm wondering if that approach would be helpful in this case. Don't know how to find out myself, got to ask.

v47

  • Posts: 147
Re: RS90 in a GBA SP shell?
« Reply #27 on: March 15, 2020, 09:56:43 pm »
Having to buy a new screen would defeat the purpose - buying this handheld would only make sense if it were cheap and hackable. Currently, it's neither - it's only a bit cheaper than the BittBoy, and you are stuck with the default firmware. For $20 or less, and with cfw that would add proper support for all the 4gen consoles, this would be awesome, but no such luck.

Zereth

  • Posts: 40
Re: RS90 in a GBA SP shell?
« Reply #28 on: March 15, 2020, 10:45:20 pm »
It would depend on the purpose. There are not many handhelds with this precise form factor, which is very special for some of us. If I could throw a 480x320 screen inside this and play slow-paced GBA RPGs in 2x zoom this would be awesome. And still cheaper than a Pi Zero W in a GBA SP case, and more convenient too (IMHO). A lot tidier for sure.
Doh, a man can dream  :P

I'll soon be trying screens in an RG300; not like I can try many of them, but I'll take advantage of having to use some 320x240 & 480x320 screens for some other stuff and give them a try for this. I know I'll have to switch FW versions and keep my fingers crossed, but I'll do what I can, learn what I don't know and ask when in doubt.

With this form factor and input options I'd aim to GBA and down. Not to mention the JZ4725B. Maybe it's a too specific use case to get traction, but it sure can get some passion. Already has  ;)

I'll try fitting this device into my budget. Money-wise, it's not expensive. Time-wise... my time budget is complicated, to say the least, and I'll have to learn a lot. But I've got a multimeter!  ;D

v47

  • Posts: 147
Re: RS90 in a GBA SP shell?
« Reply #29 on: March 16, 2020, 09:30:38 am »
Well, if you've got something that could help pcercuei in any way, then by all means, go for it - I agree that having cfw available for this device would still be really nice.

Zereth

  • Posts: 40
Re: RS90 in a GBA SP shell?
« Reply #30 on: March 16, 2020, 01:23:36 pm »
What I've got is a lot of curiosity and very strong feelings about this form factor. I don't own this particular device yet; it's two weeks until payday, give it another month to be delivered (unless that nasty covid gets in the way, which is possible). By then I'll already have those extra screens, but there's also that other, unrelated stuff I have to work on (with those screens). Plus, I have to do a lot of writing and also research, interesting times ahead. But for me this flame is lit, I just need to keep it burning; I'd appreciate any additional info anyone can throw my way.

Of course, I'll keep you posted. But (as I said) it'll take some time on my end...

Cheers!

Zereth

  • Posts: 40
Re: RS90 in a GBA SP shell?
« Reply #31 on: March 19, 2020, 11:32:46 am »
Pin 1  - 3.3V constant.
Pin 2  - 0V constant
Pin 3  - 3.3 constant, noisy
Pin 4  - 3.3 constant
Pin 5  - 0V constant
Pin 6  - slow enable-type thing
Pin 7  - fast enable-type thing
Pin 8  - 3.3v
Pin 9  - noisy 0v
Pin 10 - noisy 0v
Pin 11 - noisy 0v
Pin 12 - noisy 0v
Pin 13 - noisy 0v
Pin 14 - noisy 0v
Pin 15 - noisy 0v
Pin 16 - noisy 0v
Pin 17 - data             //8 MHz
Pin 18 - data
Pin 19 - data
Pin 20 - data
Pin 21 - data
Pin 22 - data
Pin 23 - data
Pin 24 - data

Looking at those pins I'd swear that's an ILI9341.

Edit: it does seem to match this.

Edit 2: I'm referring to the pins, not the screen itself, I know this one is smaller. Just in case.
« Last Edit: March 19, 2020, 11:49:42 am by Zereth »

 

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