ZX SPECTRUM 48K с Ebay! Разбираем схему, дорабатываем видеовыход, собираем эмулятор клавиатуры PS/2.

SUPPORT THE CHANNEL (Yumoney): https://musicboy.ru/majortomworkshop SBER CARD: 5336 6900 6775 7700 SUPPORT (monthly): https://www.youtube.com/majortomworks... https://boosty.to/majortom https://t.me/majortomworkshop ORDER a T-shirt, cap, or accessories with the BIG TOMA WORKSHOP channel logo: https://majortomworkshop.printdirect.ru Advertising ALIBABA.COM (RU) LLC, INN 7703380158: ORDER MATERIALS AND EQUIPMENT: ► DPS-5020 POWER SUPPLY UNIT https://rz6.ru/0?erid=2SDnjdoD2Rn ► SOLDERING IRON from the video https://rz6.ru/1?erid=2SDnjcKTrY8 ► MULTIMETER https://rz6.ru/160?erid=2SDnjexHy5i ► OSCILLOSCOPE https://rz6.ru/9?erid=2SDnjcbfLiU ► STRIPPER PLIERS https://rz6.ru/13?erid=2SDnjcnJhY4 ► DC-DC Converter https://rz6.ru/86?erid=2SDnjefPWcG ► ZX Spectrum T-shirt https://rz6.ru/146?erid=2SDnjc5xEGG Video "How a Computer Works?"    • Как работает компьютер? Шины адреса, управ...   0:00 My favorite childhood computer - the ZX Spectrum 0:43 What is a ZX Spectrum? 2:00 A look inside the ZX Spectrum 3:12 The CPU and the ULA chip 4:30 RAM 5:28 ROM, speaker, and RF module 6:14 Schematic diagram. RAM multiplexers 7:43 ROM addressing 8:17 The ULA chip and its functions 9:37 How does keyboard scanning work in the Spectrum? 10:47 Setting up the #FE port on the ZX Spectrum 11:30 Generating a video signal on the ZX Spectrum 12:29 RAM power supply switching converter 13:48 Modification for connecting a modern TV to the Spectrum 14:40 First power-up with current limiting 15:38 Checking all supply voltages 16:17 Is it possible to restore the keyboard cable? 17:11 Arduino-based keyboard emulator 18:18 Static RAM as the basis of a keyboard emulator 19:43 Emulator circuit and operating principle 20:27 Making keyboard connectors 21:30 Testing the KR537RU25 RAM chip 23:36 Testing the AP6 and address bus 25:08 Connecting the emulator to the Spectrum for the first time 26:27 Keypress procedure using ASCII code 27:40 Implementing the double-click function 29:16 Entering the boot command from tape on the Spectrum 29:43 Connecting an external keyboard 30:24 Description of the PS/2 protocol 31:13 Keyboard port reading procedure 32:20 Tracking press and release events 32:18 Procedure for converting PS/2 codes to ASCII codes 33:43 First launch of the emulator on Spectrum 34:06 Backspace and cursor key support 34:50 Loading a game from a smartphone onto the Spectrum 35:15 EAR connector soldering issue 36:34 Loading my Xonix game - key polling issues 37:27 Converting a TZX file to WAV for loading 38:02 Refinement of the WriteByte() procedure #majortomworkshop #majortommusic