oliver wrote:

about noise filtering:

a very big capacitor (i'm using 1000 uF) on the 3V rail eliminates the hum and also the higher pitched hum/tone caused by the DMA interrupt almost completely.
there is still the very high pitched whine though. like the hum, it is constant and not affected by the volume setting, so it's not part of the pre-amp signal.

Where did you connect the 1000uf cap? Did you connect it to the AMP AGB?

I did notice there is some noise after this mod i did.

Any help would be awesome!

I'm very interested in that too, it's just what my customized gba need to be perfect

about noise filtering:

a very big capacitor (i'm using 1000 uF) on the 3V rail eliminates the hum and also the higher pitched hum/tone caused by the DMA interrupt almost completely.
there is still the very high pitched whine though. like the hum, it is constant and not affected by the volume setting, so it's not part of the pre-amp signal.

Where did you connect the 1000uf cap? Did you connect it to the AMP AGB?

I did notice there is some noise after this mod i did.

Any help would be awesome!

a very big capacitor (i'm using 1000 uF) on the 3V rail eliminates the hum and also the higher pitched hum/tone caused by the DMA interrupt almost completely.
there is still the very high pitched whine though. like the hum, it is constant and not affected by the volume setting, so it's not part of the pre-amp signal.

The solder points are R30 & R31 thats left and right.

You cant adjust the output level with the volume but its way louder then stock level.

Here is a link of where i soldered:

https://www.facebook.com/JoeBleeps/phot … mp;theater

But basically I just wanted to ask OP's question again. After 4 years can anybody link to a guide or create a quick one on how to do a prosound for the classic GBA? Specifically an internal one like you can do with the DMG and GBC.

Telerophon wrote:

Also, you can apparently still get Afterburner kits. I remember those being a thing circa 2002; that was a custom frontlighting system for the original GBA.

I'm not sure how well it worked, but it's another way to frontlight a classic AGB-001.

The problem is, is that they're nearly impossible to find now. Besides, if you're going the frontlight route, you're better off ripping the light guide out of a gbasp instead, which would be significantly easier to source than an Afterburner kit.

Because trust me, I tried. It was actually how I stumbled on the backlighting, was by searching how to find an afterburner kit, and someone linked a chinese youtube link of the guy testing out his backlit gba.

Ah, I didn't realize you were specifically referring to a backlit screen from the AGS-101 SP. My bad.

Also, you can apparently still get Afterburner kits. I remember those being a thing circa 2002; that was a custom frontlighting system for the original GBA.

I'm not sure how well it worked, but it's another way to frontlight a classic AGB-001.

The problem is, is that they're nearly impossible to find now. Besides, if you're going the frontlight route, you're better off ripping the light guide out of a gbasp instead, which would be significantly easier to source than an Afterburner kit.

Because trust me, I tried. It was actually how I stumbled on the backlighting, was by searching how to find an afterburner kit, and someone linked a chinese youtube link of the guy testing out his backlit gba.

I'm not sure how well it worked, but it's another way to frontlight a classic AGB-001.

Luckily, you don't need to rip apart the GBA to find out if you have one with a 40 pin connector.

Take a look at this image here. The one on the left has a 32 pin connector, the one on the right has a 40 pin

There is still some variation on that number though, as the one I successfully modded says 03 5-2.

You can in fact have a backlit original GBA. It involves transplanting the LCD from an AGS-101 GBA SP into the original GBA. The only problem, is that the cable on the backlit screen originates from the bottom, and the cable from the the original GBA originates from the top. Well, some guy in China created an extension for this (you do have to solder 1 wire that powers the actual backlight). He also sells the screen and completed GBAs as well. I modded mine myself, and thought others might enjoy the same info. Also, the mod requires some trimming of the front plastic shell, as the gba  sp screen doesn't fit. The screen is the same dimension, but there's more circuit board and metal around it.

The site you order from is in chinese. I don't speak a lick of chinese, but I was able to order via a broker site called zarmark.com. How that site works, is that you tell them what you want, you pay them (plus a few bucks in fees), and they get the item shipped to their own address, and then they ship it to you. All told, I paid ~$50USD.

The cable: http://item.taobao.com/item.htm?id=14045909056  115 yuan ~= $18 USD
The screen: http://item.taobao.com/item.htm?id=16536976988 150 yuan ~= $24 USD
Completed system:  http://item.taobao.com/item.htm?id=15953144032 400 yuan ~= $64 USD

Here's a pic of metroid fusion running on my backlit gba:
http://farm9.staticflickr.com/8456/8069 … 745b_c.jpg

Hope any of this helps.