I tested the midi port - it works. I posted the archive with the KiСAD project and the archive with the scheme and gerbers in the first post of the thread. Thanks to everyone who helped me.

from what I can see it works fine? If there are no failures in a week, then it will be possible to say that it works. :) In addition, Tronix has a second assembled copy of the board, and it has been in working order for a long time. It remains only to check the external MIDI port. Unfortunately, I …

It turned out that the device was in conflict with the Sound Blaster! The Blaster does not use all address lines for decoding, so it began to occupy the bus along with the IMFC, and prevented it from working. There were no software problems with the drivers, it turns out. It's alive! https://youtu. …

Did you already correct the error on ZD1 in your schematic/board? What was the error? Yes, I fixed it, but I haven't committed it yet. GND was connected to the wrong layer. Interesting find with the delay loop. So they already knew this problem. Unfortunately, the problem remains. The fix helped …

Here's what the music map looks like now. To Physikant: for some reason, I do not have the permissions to respond on private messages, so I will answer your questions here. a) How on earth did you figure out the layout of the top sub layer (In1.Cu)? The grounding seems wild to me! Are you sure about …

Is there some github or something of this project? I would like to try to assemble one myself, even if there are some flaws in this version :) You can find the KiCad project here: http://svn.stdio.ru/svn/trunk/imfc_clone/hardware/ I have already assembled the board completely. Once the card even …

Received the PCB from the factory. I plan to start assembling soon.

Hi sgc! How's it going with this board? Did you manage to resolve this last issue? Recently a video was released on the LGR Youtube channel about the IMFC: https://youtu.be/lyIBfjsTZcQ . The screenshot from this video clearly shows that the RA1.2 pin is used. According to my layout, the only place …

scg wrote on 2022-09-17, 19:50: In this photo, it looks like a wire is connected to pin 2 of the RA1. RA1-2_2.jpg I'm assuming that pin pin 2 of the RA1 is connected to pin 13 U5. This doesn't make sense, however I can't explain the wire I've marked red in the picture above. Can anyone check if …

In this photo, it looks like a wire is connected to pin 2 of the RA1. Filename RA1-2_2.jpg File size 87.42 KiB Views 2552 views

Pin 2 of RA1 is NC It turns out that I do not understand the purpose of the wire, which I marked in red in the photo. I assumed that one end of it is connected to pin RA1-2. unk_wire.jpg unless this is a three layer board but I don't think it is. I assume there are four layers: signal-GND-POWER- …

Preliminary version (pre1) of the IMFC scheme. Now, only one thing remains unclear: what is the pin 2 of the resistor matrix RA1 connected to? Almost completed PCB layout. As soon as I deal with the last issue, I will order the production of a test PCB.

Thanks for the comprehensive answer. I will try to process this information. I hope that I have no more questions about the components.

I have one. I can post some high res photos. Thank you very much! Your photos have been very helpful to me. Most of the issues have been resolved. There are only a few questions left that could not be seen. Values of following units: - Capacitors: C2, C3 and C4, C6 - Capacitor C67 - Resistor R35 - …

Hello. I'm trying to reconstruct a IMFC schematic using photos from the Internet. But not all the details can be seen in public photos. In particular, I was unable to find out the values of some units: capacitors, resistors and ICs. Maybe someone has this card in the collection and he can see the …

Stojke wrote: Is there an available working MS-DOS SID player for this card yet? You can get DOS player here: https://stdio.ru/download/ssi-2001/osp2001-0.2.zip And sources: https://stdio.ru/download/ssi-2001/osp2001-0.2-src.zip