{"id":13,"date":"2023-05-24T16:28:33","date_gmt":"2023-05-24T15:28:33","guid":{"rendered":"http:\/\/www.reading-uk.net\/?p=13"},"modified":"2023-05-24T21:40:14","modified_gmt":"2023-05-24T20:40:14","slug":"how-the-z-80-work","status":"publish","type":"post","link":"https:\/\/www.reading-uk.net\/en\/how-the-z-80-work\/","title":{"rendered":"How the Z-80 work"},"content":{"rendered":"\n<p>The Z80 microprocessor is an 8-bit CPU (Central Processing Unit) that was introduced by Zilog in 1976. It became one of the most popular processors of its time and was widely used in a variety of home computers, gaming consoles, and other electronic devices.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"588\" height=\"305\" src=\"http:\/\/www.reading-uk.net\/wp-content\/uploads\/2023\/05\/image-1.png\" alt=\"\" class=\"wp-image-14\" srcset=\"https:\/\/www.reading-uk.net\/wp-content\/uploads\/2023\/05\/image-1.png 588w, https:\/\/www.reading-uk.net\/wp-content\/uploads\/2023\/05\/image-1-300x156.png 300w\" sizes=\"auto, (max-width: 588px) 100vw, 588px\" \/><\/figure>\n\n\n\n<p>Here&#8217;s a simplified overview of how the Z80 processor works:<\/p>\n\n\n\n<p>Fetch: The Z80 fetches an instruction from memory. The program counter (PC) holds the memory address of the next instruction to be executed.<\/p>\n\n\n\n<p>Decode: The fetched instruction is decoded to determine the operation to be performed.<\/p>\n\n\n\n<p>Execute: The decoded instruction is executed, carrying out the desired operation. This could involve arithmetic calculations, data manipulation, or control flow instructions.<\/p>\n\n\n\n<p>Update PC: The program counter (PC) is updated to point to the next instruction in memory.<\/p>\n\n\n\n<p>Repeat: Steps 1 to 4 are repeated for each instruction in the program until the program terminates or encounters a branching instruction that modifies the flow of execution.<\/p>\n\n\n\n<p>The Z80 processor has a set of registers that are used for various purposes:<\/p>\n\n\n\n<p>Accumulator (A): The accumulator is the primary register used for arithmetic and logical operations.<\/p>\n\n\n\n<p>General-Purpose Registers (B, C, D, E, H, L): These registers can be used for storing data and are often involved in arithmetic and data manipulation operations.<\/p>\n\n\n\n<p>Flags Register (F): The flags register stores status information about the results of the previous arithmetic or logical operation, such as carry, zero, sign, and parity flags.<\/p>\n\n\n\n<p>Program Counter (PC): The program counter holds the memory address of the next instruction to be executed.<\/p>\n\n\n\n<p>Stack Pointer (SP): The stack pointer points to the top of the stack, which is a region of memory used for storing data temporarily during subroutine calls and interrupt handling.<\/p>\n\n\n\n<p>The Z80 also supports a variety of addressing modes, such as immediate addressing, direct addressing, indirect addressing, and indexed addressing, which provide flexibility in accessing memory and operands.<\/p>\n\n\n\n<p>Overall, the Z80 processor follows a fetch-decode-execute cycle to read instructions from memory, perform the necessary operations, and move to the next instruction, enabling the execution of programs and the manipulation of data.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Z80 microprocessor is an 8-bit CPU (Central Processing Unit) that was introduced by Zilog&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-13","post","type-post","status-publish","format-standard","hentry","category-hardware"],"_links":{"self":[{"href":"https:\/\/www.reading-uk.net\/en\/wp-json\/wp\/v2\/posts\/13","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.reading-uk.net\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.reading-uk.net\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.reading-uk.net\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.reading-uk.net\/en\/wp-json\/wp\/v2\/comments?post=13"}],"version-history":[{"count":1,"href":"https:\/\/www.reading-uk.net\/en\/wp-json\/wp\/v2\/posts\/13\/revisions"}],"predecessor-version":[{"id":15,"href":"https:\/\/www.reading-uk.net\/en\/wp-json\/wp\/v2\/posts\/13\/revisions\/15"}],"wp:attachment":[{"href":"https:\/\/www.reading-uk.net\/en\/wp-json\/wp\/v2\/media?parent=13"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.reading-uk.net\/en\/wp-json\/wp\/v2\/categories?post=13"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.reading-uk.net\/en\/wp-json\/wp\/v2\/tags?post=13"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}