1 Reply by Val

(3 replies, posted in Nintendo Handhelds)

Jazzmarazz wrote:

1. Yes, the tempo will change. You can however have the tempo controlled externally, so it will remain constant..

So, lets say, the "master" would be the unmodified dmg with the 4.19 xtal and the slave will be the half speed modded 2.09 xtal?. Hmm.. I thought the sync master overrides the slave clock... but the z80 slave keeps using his own xtal for sound cycles?, is there a risk of a processor crash here maybe?

Jazzmarazz wrote:

2. Sure, as long as the output signal is clean and stays within the safe freq range. The reason so may people use the LTC is because it requires so any fewer components to get it running. A 555 timer will require resistors and caps, whereas the LTC just needs a resistor or two.

I'm ok with resistors and caps. 555 easier to get, LTC not available locally. I think I saw an schematic aplication on the 555 specs sheet that could work but can't rememebr. Has anyone else already tried this? because I'm not sure about the ranges or cleanliness, as I remember 555 will distort pretty bad at some freqs.

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2 Topic by Val

(3 replies, posted in Nintendo Handhelds)

Hello. I have a a quick question. Warnning you it may sound a little dumb/noob but it's been a while.

1. If changing to 2.019 crystal my song playback tempo in lsdj will change too?. (Can't rememebr if song speed only counts for sync port). If yes, is there a way to only vari pitch and not tempo.

2. Is it possible to completely replace DMG osc crystal with a 555 timer?

Thanks for your answers.

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3 Reply by Val

(26 replies, posted in Other Vintage Computers & Consoles)

akira^8GB wrote:

I don't think the 50CT or 70CT have the USB interface, but they probably have the MIDI. Do you have any documents to hack it?
Also: I managed to boot my 50CT. I needed to upgrade  the firmware to the latest version. I suggest anyone with a Libretto doing the same.

Now my 50CT is running happy dualbooting Win98 and DOS, and my PCMCIA transfer kits work great. I only boot Windows when I need to transfer files.

Did you mean the BIOS, upgrade BIOS right?, cause  I was about to suggest the same.

Did PulseLooper got his issues solved?

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