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Dingoo Mod – to the EXTREEEM!

Posted 2010.06.02 18.32 in Computers/Internet/Technology

For no really good reason, I had to mod a Dingoo A320 with a memory upgrade. The 320 has 32MB of RAM, but the A330 has 64MB of RAM. IMHO the A320 has more going for it, fewer glitches, than the 330. But the 330 has more memory…

So you can see how I’d already be vaguely thinking about it. Then over on Dingoonity, a user named flaming_goat asked if it would be possible. Well you know there’s no turning back after that…

I read up on the chips in the 330, and the chips in the 320. I checked my 320 to see how it was wired. It looked feasable. None of my tests said it would fail, so the only way to know for sure was to try it.

DigiKey had the chips I wanted and they were only about $12.50 for a pair of them. No turning back now…

Detailed instructions follow below the fold…

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Dingoo A330

Posted 2010.05.31 20.26 in Computers/Internet/Technology

It’s the new release from Dingoo Technologies. I got one to satisfy my curiosity, but sadly it disappoints on many levels.

Dingoo A330

I made up a new version of Dingux that takes advantage of the added memory and faster clock speed. To do that, I needed to get a serial port in there for testing. Unlike the A320, the 330 seems to just have half a port; TX but no RX. So you can get debug data out, but you can’t interact with it. Sucky.

Probing for the RX Line

The TX data is found on a single unmarked testpoint that lies beneath the LCD screen, in the upper middle part of the motherboard. In hopes of finding the RX line, I did some probing to the copper traces around the CPU in the area of the TX line, but neither of my two most-promising candidates proved to be RX data. It is probably not connected at all. More sucky.

A330 Motherboard

I stuck the serial port on the left-hand side of the Dingoo, above the reset button. It was the only clear spot on the motherboard, but it turns out the left speaker wants to sit there, and the serial port keeps failing on me – I have to take it apart and fiddle with it to get it working again. The A330 disappoints on many levels.