Come funzionano i computer? CPU, ROM, RAM, bus indirizzi, bus dati, bus di controllo, decodifica ...

0:00 The video starts by explaining the role of the CPU in a computer. 0:45 It then defines computer memory and cell addresses. 1:30 It covers read‑only memory and random‑access memory. 2:25 The BIOS and its operation are described. 3:25 The address bus is introduced. 5:18 The control bus and RD/WR signals are explained. 7:16 The data bus is discussed, including how to read a byte from memory. 9:56 Address decoding is covered. 10:48 The decoding of integrated memory circuits into ranges is shown. 11:29 The relationship between addressable space and the number of address bits is examined. 12:33 Decoding of ROM and RAM integrated circuits in a computer is presented. 14:04 The hexadecimal numbering system and its relation to binary are explained. 16:00 The use of address bits for memory decoding is shown. 16:45 Signals CS, OE, and the tri‑state Z output are discussed. 17:35 A decoder built with an inverter and line A15 is demonstrated. 18:18 Reading and writing in memory in a computer system is shown. 20:46 Contiguous address space and real‑world address decoding are covered. 21:45 The operation of video memory is explained. 22:39 Decoding of I/O ports, including IORQ and MEMRQ signals, is described. 23:55 Adding an output port to the computer is shown. 25:13 The operation of a 1‑bit port using a D‑type flip‑flop is explained. 26:12 The ISA and PCI buses and device decoding principles are discussed.