Some questions

[krzak]

Is it better to use a DF or D7?

[dmitri]

D7

[krzak]

A little bit I do not understand what is a full swing oscillator. I think that I use the normal resonator, something like a list of components. Exactly such as http://www.nikomp.com.pl/opisy/RV000/RVREZ49U.htm whether the programming D7 should everything will work properly?

I confuse these resonators, oscillators, and whatever else is.

[dmitri]

Both DF and D7 will work.

[krzak]

If I use 74hc4851, then I need to replace the input resistor by jumpers and skip diodes. But the resistors R1 and R34 have to be soldered?

Should Amtega644 at 20Mhz work properly with PIC18LF2550 at 12MHz?

[dmitri]

If I use 74hc4851, then I need to replace the input resistor by jumpers and skip diodes. But the resistors R1 and R34 have to be soldered?

Yes.

Should Amtega644 at 20Mhz work properly with PIC18LF2550 at 12MHz?

Yes.

[krzak]

LCD shows the active inputs, but on the PC nothing happens. I checked on the MCT and the MM, and MIDI logs shows nothing. The MCT showed a few times, but for a moment, and then nothing again. The computer detects Megadrum, and it is in the list of system hardware. In what could be the problem?

[dmitri]

1. Breaks/shorts between pin 15 of Atmega and pin 18 of PIC
2. Mismatch between MegaDrum firmware and crystal frequency.

[krzak]

It works. Just have to get rid of the latency is pretty high.

In the MIDI Speed ​​I have only two speeds to choose.

Do Last unecrypted firmware don't have in MIDI Speed to choose MIDI+USB, USB only 1, USB only 2, USB only 3?

[dmitri]

It works.

You just switched it on another time and it worked?

Just have to get rid of the latency is pretty high.

Really? How high?

In the MIDI Speed ​​I have only two speeds to choose.

Do Last unecrypted firmware don't have in MIDI Speed to choose MIDI+USB, USB only 1, USB only 2, USB only 3?

In viewtopic.php?f=3&t=1075 you can see that this option was added only in version 20110424