{"id":4917,"date":"2022-09-19T15:17:39","date_gmt":"2022-09-19T13:17:39","guid":{"rendered":"https:\/\/retrofixer.it\/?page_id=4917"},"modified":"2026-10-29T10:33:58","modified_gmt":"2026-10-29T09:33:58","slug":"zx80","status":"publish","type":"page","link":"https:\/\/retrofixer.it\/en\/zx80\/","title":{"rendered":"ZX80"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"4917\" class=\"elementor elementor-4917\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ca160b5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ca160b5\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-top-column elementor-element elementor-element-6fa07cb\" data-id=\"6fa07cb\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1bc12a5 elementor-widget elementor-widget-mfn_before_after\" data-id=\"1bc12a5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"mfn_before_after.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"before_after twentytwenty-container\" data-before=\"Fuori\" data-after=\"Dentro\"><img fetchpriority=\"high\" decoding=\"async\" width=\"513\" height=\"600\" src=\"https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_top.png\" class=\"attachment-full size-full\" alt=\"zx80 top - ZX80\" srcset=\"https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_top.png 513w, https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_top-257x300.png 257w, https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_top-10x12.png 10w, https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_top-125x146.png 125w, https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_top-43x50.png 43w, https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_top-64x75.png 64w\" sizes=\"(max-width:767px) 480px, 513px\" \/><img decoding=\"async\" width=\"513\" height=\"600\" src=\"https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_bottom.png\" class=\"attachment-full size-full\" alt=\"zx80 bottom - ZX80\" srcset=\"https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_bottom.png 513w, https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_bottom-257x300.png 257w, https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_bottom-10x12.png 10w, https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_bottom-125x146.png 125w, https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_bottom-43x50.png 43w, https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_bottom-64x75.png 64w\" sizes=\"(max-width:767px) 480px, 513px\" \/><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-fd68782\" data-id=\"fd68782\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2de06d4 elementor-widget elementor-widget-heading\" data-id=\"2de06d4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Production: 1980<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b0cc21c elementor-widget elementor-widget-heading\" data-id=\"b0cc21c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h6 class=\"elementor-heading-title elementor-size-default\">OS: Sinclair Basic<\/h6>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e1eb714 elementor-widget elementor-widget-progress\" data-id=\"e1eb714\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"progress.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<span class=\"elementor-title\" id=\"elementor-progress-bar-e1eb714\">\n\t\t\t\tClock 3.25 MHz\t\t\t<\/span>\n\t\t\n\t\t<div aria-labelledby=\"elementor-progress-bar-e1eb714\" class=\"elementor-progress-wrapper\" role=\"progressbar\" aria-valuemin=\"0\" aria-valuemax=\"100\" aria-valuenow=\"90\">\n\t\t\t<div class=\"elementor-progress-bar\" data-max=\"90\">\n\t\t\t\t<span class=\"elementor-progress-text\"><\/span>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b6096d4 elementor-widget elementor-widget-progress\" data-id=\"b6096d4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"progress.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<span class=\"elementor-title\" id=\"elementor-progress-bar-b6096d4\">\n\t\t\t\t1Kb ram\t\t\t<\/span>\n\t\t\n\t\t<div aria-labelledby=\"elementor-progress-bar-b6096d4\" class=\"elementor-progress-wrapper\" role=\"progressbar\" aria-valuemin=\"0\" aria-valuemax=\"100\" aria-valuenow=\"2\">\n\t\t\t<div class=\"elementor-progress-bar\" data-max=\"2\">\n\t\t\t\t<span class=\"elementor-progress-text\"><\/span>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4194b96 elementor-widget elementor-widget-progress\" data-id=\"4194b96\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"progress.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<span class=\"elementor-title\" id=\"elementor-progress-bar-4194b96\">\n\t\t\t\tWhite black\t\t\t<\/span>\n\t\t\n\t\t<div aria-labelledby=\"elementor-progress-bar-4194b96\" class=\"elementor-progress-wrapper\" role=\"progressbar\" aria-valuemin=\"0\" aria-valuemax=\"100\" aria-valuenow=\"1\">\n\t\t\t<div class=\"elementor-progress-bar\" data-max=\"1\">\n\t\t\t\t<span class=\"elementor-progress-text\"><\/span>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9e183dd elementor-widget elementor-widget-progress\" data-id=\"9e183dd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"progress.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<span class=\"elementor-title\" id=\"elementor-progress-bar-9e183dd\">\n\t\t\t\t32 Columns\t\t\t<\/span>\n\t\t\n\t\t<div aria-labelledby=\"elementor-progress-bar-9e183dd\" class=\"elementor-progress-wrapper\" role=\"progressbar\" aria-valuemin=\"0\" aria-valuemax=\"100\" aria-valuenow=\"40\">\n\t\t\t<div class=\"elementor-progress-bar\" data-max=\"40\">\n\t\t\t\t<span class=\"elementor-progress-text\"><\/span>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-89b3846 elementor-widget elementor-widget-progress\" data-id=\"89b3846\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"progress.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<span class=\"elementor-title\" id=\"elementor-progress-bar-89b3846\">\n\t\t\t\tAudio: none\t\t\t<\/span>\n\t\t\n\t\t<div aria-labelledby=\"elementor-progress-bar-89b3846\" class=\"elementor-progress-wrapper\" role=\"progressbar\" aria-valuemin=\"0\" aria-valuemax=\"100\" aria-valuenow=\"0\">\n\t\t\t<div class=\"elementor-progress-bar\" data-max=\"0\">\n\t\t\t\t<span class=\"elementor-progress-text\"><\/span>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-471e89c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"471e89c\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;animation&quot;:&quot;none&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3ad22d3\" data-id=\"3ad22d3\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-53ef8c4 elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"53ef8c4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<i aria-hidden=\"true\" class=\"fas fa-tools\"><\/i>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-42cfab9 elementor-headline--style-highlight elementor-widget elementor-widget-animated-headline\" data-id=\"42cfab9\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;highlighted_text&quot;:&quot;80&quot;,&quot;marker&quot;:&quot;underline&quot;,&quot;headline_style&quot;:&quot;highlight&quot;,&quot;loop&quot;:&quot;yes&quot;,&quot;highlight_animation_duration&quot;:1200,&quot;highlight_iteration_delay&quot;:8000}\" data-widget_type=\"animated-headline.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<h2 class=\"elementor-headline\">\n\t\t\t\t\t<span class=\"elementor-headline-plain-text elementor-headline-text-wrapper\">ZX <\/span>\n\t\t\t\t<span class=\"elementor-headline-dynamic-wrapper elementor-headline-text-wrapper\">\n\t\t\t\t\t<span class=\"elementor-headline-dynamic-text elementor-headline-text-active\">80<\/span>\n\t\t\t\t<\/span>\n\t\t\t\t<\/h2>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0db8371 elementor-widget elementor-widget-text-editor\" data-id=\"0db8371\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Sinclair's first computer! The ZX80 came out on 29 January 1980 and stayed in production until 1981: little more than a year, but enough to change the history of computing in Britain.<\/p>\r\n<h3>The first computer under 100 pounds<\/h3>\r\n<p>It was sold by Clive Sinclair's Science of Cambridge, which shortly afterwards became Sinclair Research. The hardware was designed by Jim Westwood. You could buy it by mail order as a kit to build yourself for 79.95 pounds or ready-built for 99.95 pounds: note the pricing policy already making it look like less than 100 pounds. For the time it was a very low price, and the ZX80 is considered the first computer sold in Britain for under 100 pounds.<\/p>\r\n<p>The name comes from the Z80 processor, while the X was, as the advertising put it, \"the mystery ingredient\". About 50,000 were sold, and its success paved the way for the ZX81 and the ZX Spectrum, which gave Britain more home computers than any other country in the 1980s.<\/p>\r\n<h3>Inside the machine<\/h3>\r\n<p>It was built to save money, and indeed there is very little inside. Everything is controlled by the Z80 processor, which handles practically everything: video, RAM, keyboard and the outside world, with the help of a handful of logic chips. The case is white plastic and does not even have screws: it is held shut by plastic clips similar to rivets. The black stripes on the lid look like air vents, but they are only decorative.<\/p>\r\n<ul>\r\n<li>Z80 CPU (often the NEC \u03bcPD780C-1) at 3.25 MHz<\/li>\r\n<li>1 KB of static RAM, expandable up to 16 KB with memory packs<\/li>\r\n<li>4 KB of ROM with Sinclair BASIC, which works with integers only, the editor and the operating system<\/li>\r\n<li>Black-and-white video to a TV: 24 lines of 32 characters and 64\u00d748 block graphics, generated in software<\/li>\r\n<li>40-key membrane keyboard printed straight onto the circuit board, with no key travel<\/li>\r\n<li>No sound, programs saved on an ordinary cassette recorder<\/li>\r\n<\/ul>\r\n<h3>Its flaws and the arrival of the ZX81<\/h3>\r\n<p>Its most famous flaw is the screen: since the processor generates the picture, it cannot draw it while it is working. Every time a key is pressed or a program runs the screen goes black and flickers, which made games with moving graphics almost impossible. The keyboard was also very awkward, if not unusable: on top of getting used to Sinclair's odd system for typing commands, the keys had no travel and if you did not press them right in the middle the command was not entered.<\/p>\r\n<p>In 1981 came the ZX81, which puts almost all the logic into a single ULA chip and adds SLOW mode, which keeps the picture on screen even while a program is running. For existing ZX80 owners Sinclair sold an upgrade: an 8 KB ROM, the same as the ZX81's, with a new keyboard overlay. With this ROM the ZX80 behaves almost like a ZX81, apart from SLOW mode.<\/p>\r\n<div style=\"display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:18px 0 24px;max-width:640px\">\r\n<figure style=\"margin:0\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/retrofixer.it\/wp-content\/uploads\/2026\/10\/zx80-8k.jpg\" width=\"600\" height=\"480\" alt=\"Sinclair ZX80 con aggiornamento ROM da 8 KB\" style=\"width:100%;height:auto;border-radius:6px\"><figcaption style=\"font-size:13px;opacity:.8;margin-top:6px\">A ZX80 with the 8 KB ROM upgrade and the new keyboard overlay (photo: Samuel Mann, CC BY 2.0)<\/figcaption><\/figure>\r\n<\/div>\r\n<h3>Connections<\/h3>\r\n<p>On the back there are 3 3.5 mm jacks, yes, all the same. The first on the left (seen from behind) is the microphone signal for the recorder, the second is the earphone (the audio signal from the recorder) and the one next to the TV connector is the 9 V DC power input, with the tip positive and the sleeve negative. They are all mono jacks with only 2 contacts, and the problem is that they are easy to mix up: be careful not to plug the power supply into one of the others, or you will fry the computer.<\/p>\r\n<p>Slightly higher up is the modulator connector, which goes to the TV with an aerial cable, and at the end the expansion connector.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-ca9a14e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ca9a14e\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-3e4c46b\" data-id=\"3e4c46b\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5390ba3 elementor-widget elementor-widget-image\" data-id=\"5390ba3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"648\" height=\"300\" src=\"https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_port.png\" class=\"attachment-large size-large wp-image-4924\" alt=\"zx80 port - ZX80\" srcset=\"https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_port.png 648w, https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_port-300x139.png 300w, https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_port-18x8.png 18w, https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_port-260x120.png 260w, https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_port-50x23.png 50w, https:\/\/retrofixer.it\/wp-content\/uploads\/2022\/09\/zx80_port-150x69.png 150w\" sizes=\"(max-width:767px) 480px, 648px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-f705d15 elementor-widget elementor-widget-text-editor\" data-id=\"f705d15\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"letter-spacing: 0px;\"><span style=\"color: #ffcc00;\"><b>Nice is not it?<br \/><\/b><\/span>Well, below is the classic computer screen that will accompany all models up to the Spectrum 48k.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5fd9ef4 elementor-widget elementor-widget-image\" data-id=\"5fd9ef4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"542\" height=\"397\" src=\"https:\/\/retrofixer.it\/wp-content\/uploads\/2020\/07\/zx_screen.gif\" class=\"attachment-large size-large wp-image-932\" alt=\"zx screen - ZX Spectrum\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-84f4a43 elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"84f4a43\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;stretch_section&quot;:&quot;section-stretched&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a4d4a3e\" data-id=\"a4d4a3e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f7eb70d elementor-widget elementor-widget-text-editor\" data-id=\"f7eb70d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>Games and programs<\/h3>\r\n<p>Remember that back then it was quite something to be able to build your own computer from a processor, a ROM, a RAM and a handful of logic chips. Even though it is very cheap, with no colour and no graphics features, some games and adventures were made for it. Today, with a much deeper knowledge of the processor, enthusiasts have managed to create incredible games for this machine, given how little memory it has: something unthinkable at the time.<\/p>\r\n<div style=\"display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:18px 0 24px;max-width:none\">\r\n<figure style=\"margin:0\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/retrofixer.it\/wp-content\/uploads\/2026\/10\/zx80-caratteri.png\" width=\"320\" height=\"240\" alt=\"Set di caratteri del Sinclair ZX80\" style=\"width:100%;height:auto;border-radius:6px;image-rendering:pixelated\"><figcaption style=\"font-size:13px;opacity:.8;margin-top:6px\">The ZX80 character set (public domain, CC0)<\/figcaption><\/figure>\r\n<figure style=\"margin:0\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/retrofixer.it\/wp-content\/uploads\/2026\/10\/zx80-fattoriale.png\" width=\"320\" height=\"240\" alt=\"Programma BASIC sul Sinclair ZX80\" style=\"width:100%;height:auto;border-radius:6px;image-rendering:pixelated\"><figcaption style=\"font-size:13px;opacity:.8;margin-top:6px\">A small BASIC program that works out factorials (image: Rept0n1x, CC BY-SA 3.0)<\/figcaption><\/figure>\r\n<\/div>\r\n<h3>What it is worth today<\/h3>\r\n<p>Very cheap when it came out, today this computer sells for 8 to 10 times its original price: it is considered rare and sought after. Unfortunately the ones you find often have scratches, parts melted by contact with cables or by heat, broken pieces of the case or cut-outs from modifications, which pushes the price of a perfect example even higher.<\/p>\r\n<h3>Emulators and replicas<\/h3>\r\n<p>To try it without owning one you can use an emulator, or build a modern ZX80-compatible replica.<\/p>\r\n<ul>\r\n<li><a href=\"https:\/\/sourceforge.net\/projects\/eightyone-sinclair-emulator\/\" target=\"_blank\" rel=\"noopener\">EightyOne: a Windows emulator for the ZX80, ZX81 and Spectrum<\/a><\/li>\r\n<li><a href=\"https:\/\/www.mamedev.org\/\" target=\"_blank\" rel=\"noopener\">MAME: also emulates the ZX80<\/a><\/li>\r\n<li><a href=\"https:\/\/www.tindie.com\/products\/tynemouth\/minstrel-2-with-keyboard-z80-based-zx80-kit\/\" target=\"_blank\" rel=\"noopener\">Minstrel 2 by Tynemouth Software: a modern ZX80-compatible kit with 16 KB of RAM<\/a><\/li>\r\n<\/ul>\r\n<p>At Retrofixer we are not after perfection: we want to save and preserve these machines. Watch this video of a ZX80 repair!<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-706edeb elementor-widget elementor-widget-video\" data-id=\"706edeb\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/www.youtube.com\\\/watch?v=ZkD2JLqb1QE&amp;lc=UgylNPzN1hPWJxD5aOB4AaABAg&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Produzione: 1980 OS: Sinclair Basic Clock 3,25 MHz 1Kb ram Bianco\/nero 32 Colonne Audio: nessuno ZX 80 Il primo computer della Sinclair! Lo ZX80 \u00e8 uscito<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":11378,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[19,62],"tags":[261,11,260,251,37,259],"class_list":["post-4917","page","type-page","status-publish","has-post-thumbnail","hentry","category-computer","category-sinclair","tag-firt-computer","tag-flicker","tag-primo-computer","tag-sinclair","tag-z80","tag-zx80"],"_links":{"self":[{"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/pages\/4917","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/comments?post=4917"}],"version-history":[{"count":3,"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/pages\/4917\/revisions"}],"predecessor-version":[{"id":11318,"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/pages\/4917\/revisions\/11318"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/media\/11378"}],"wp:attachment":[{"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/media?parent=4917"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/categories?post=4917"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/tags?post=4917"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}