For those who will collect the map themselves

Hello caro As a result of assembling and debugging the first copies of ZX_MCard, it took a little finalize the diagram. The final version replaced the old one in the first post of this topic. The improvements mainly concern the real-time clock. 1) I had to put a 6.8 pF capacitor between the connection input quartz and power supply to the RTC chip, otherwise the quartz worked at a higher frequency. 2) I also had to install 10 kOhm pull-up resistors on the data lines and clock i2c interface frequencies. 3) In order to use standard cords to connect COM ports from IBM motherboards, it is advisable to correct the MAX232 pinout to connector X2. In principle, you can do without this by unsoldering the DB9M connection, as shown on the diagram. I'll post photos of the improvements a little later.