Sender | Message | Time |
---|---|---|
17 May 2022 | ||
has anyone tried to make an alternative? | 19:40:30 | |
If you want to post your pics, there's a wiki page of bootlegs somewhere with pics of boards, with the intention of documenting which are reflashable. | 19:40:45 | |
I don't know of a straight replacement for Gekkio's site though. It would be cool if it was a part of gbdev.io but those guys have enough on their plate already | 19:41:36 | |
Imma try and find that wiki page | 19:41:49 | |
Ah, it's flashcartdb.com from InsideGadgets | 19:43:36 | |
* Ah, it's (flashcartdb.com) from InsideGadgets | 19:43:50 | |
* Ah, it's (flashcartdb.com] from InsideGadgets | 19:43:59 | |
* Ah, it's [flashcartdb.com] from InsideGadgets | 19:44:07 | |
* Ah, it's flashcartdb.com from InsideGadgets | 19:44:13 | |
20:55:09 | ||
21:53:40 | ||
23:20:26 | ||
18 May 2022 | ||
02:29:58 | ||
Hi, anyone knows if i can use an LM7809 regulator on a DMG for a backlight led strip? I live on a shitty country and cant access to foreign products | 02:29:58 | |
Probably not? The only power supply in a DMG that's higher than 9V is the -19V backlight bias, and it's unlikely capable of sourcing enough current to drive LEDs brightly enough | 07:19:42 | |
Probably the best cheap plan is to use the 6V 4xAA batteries directly to drive the LEDs, and adjust the number of LEDs in series so that works | 07:21:56 | |
08:03:13 | ||
10:50:06 | ||
12:40:36 | ||
Which country? | 15:15:16 | |
In particular, is it Argentina where ax6 also lives? | 15:22:15 | |
you can access foreign products here; they just tend to be expensive because of a weak currency and high tariffs | 16:10:16 | |
* Probably not? The only power supply in a DMG that's higher than 9V is the -19V | 16:20:34 | |
16:21:15 | ||
More audio testing I switched the power supply of the attiny/neopixels to the 3.3V supply (linear regulator off of 5V rail). Still just as noisy. Adding diode didn't help. Added a 5V boost to add some inductance in-line, and it barely made a difference. Then I used a converter off of the battery supply to power the LEDs, and it helped a good amount. But at high volumes you can still kind of hear it. So not totally eliminated. I think because it's so low frequency, it's hard to filter out or prevent totally. My next idea is to try a separate power supply specifically for the audio amp. I noticed the IPS screen introduces a background white noise, and while quiet, I'm interested to see if running the audio amp off a separate supply might squash that too | 22:16:22 | |
At this point I'm being nitpicky, because turning off the LEDs during gameplay makes it sound fine. The backlights are more for a display mode anyway | 22:16:45 | |
* More audio testing I switched the power supply of the attiny/neopixels to the 3.3V supply (linear regulator off of 5V rail). Still just as noisy. Adding diode didn't help. Added a 5V boost to add some inductance in-line, and it barely made a difference. Then I used a converter off of the battery supply to power the LEDs, to keep the supplies separated as possible, and it helped a good amount. But at high volumes you can still kind of hear it. So not totally eliminated. I think because it's so low frequency, it's hard to filter out or prevent totally. My next idea is to try a separate power supply specifically for the audio amp. I noticed the IPS screen introduces a background white noise, and while quiet, I'm interested to see if running the audio amp off a separate supply might squash that too | 22:17:33 | |
* More audio testing I switched the power supply of the attiny/neopixels to the 3.3V supply (linear regulator off of 5V rail). Still just as noisy. Adding diode didn't help. Added a 5V boost to add some inductance in-line, and it barely made a difference. Then I used a converter off of the battery supply to power the LEDs, to keep the supplies separated as possible, and it helped a good amount. But at high volumes you can still kind of hear it. So not totally eliminated. I think because it's so low frequency, it's hard to filter out or prevent totally. My next idea is to try a separate power supply specifically for the audio amp. I noticed the IPS screen introduces a background white noise, and while pretty quiet and not distracting especially just through the speaker, I'm interested to see if running the audio amp off a separate supply might squash that too | 22:18:11 | |
As far as the audio generation goes, it's played at the CPU's native frequency, right? Not mixed down to something like 48khz? I had a thought of trying to emulate this in a raspberry pi pico, considering I got it to play some GBS files, but I figured trying to mimic the GB's hardware would probably sound better than software mixing at a lower sample rate | 23:56:18 | |
It sounds like the rp2040 can do up to 32-bit DMA to peripherials, which sounds like it'd be more than enough to set the pins | 23:57:15 |