{"id":1121,"date":"2025-01-11T17:45:31","date_gmt":"2025-01-11T16:45:31","guid":{"rendered":"https:\/\/blog.udisks.ovh\/?p=1121"},"modified":"2025-10-13T16:04:38","modified_gmt":"2025-10-13T14:04:38","slug":"acorn-electron","status":"publish","type":"post","link":"https:\/\/www.mundocaos.com\/?p=1121","title":{"rendered":"Acorn Electron"},"content":{"rendered":"\n<p>Dise\u00f1ado por Acorn y lanzado en Julio de 1983, el <strong>Electron<\/strong> es una versi\u00f3n barata del <strong>Proton<\/strong>, m\u00e1s conocido como <strong>BBC Micro<\/strong>. Este era muy costoso debido a sus muchas opciones de expansi\u00f3n y a la alta calidad de construcci\u00f3n, lo que hac\u00eda que no se vendiera mucho fuera de las escuelas.<\/p>\n\n\n\n<p>En el Electron se utilizaron chips compatibles m\u00e1s econ\u00f3micos y se eliminaron la mayor\u00eda de caracter\u00edsticas avanzadas del BBC Micro, como el coprocesador gr\u00e1fico, la posibilidad  de un segundo procesador y los conectores de ROM&#8217;s. Todas estas posibilidades de expansi\u00f3n se dejaron en mano de dispositivos externos.<\/p>\n\n\n\n<p>En el Electron se pas\u00f3 de los 102 chips de la placa del BBC Micro a 12 o 14 (seg\u00fan versi\u00f3n). Toda la gesti\u00f3n de la memoria, gr\u00e1ficos y sonido, entre otros, se integr\u00f3 en una <strong><em>ULA<\/em><\/strong> (<em>Undedicated Logic Array<\/em>), lo que dio problemas de compatibilidad con parte del software para el BBC.<\/p>\n\n\n\n<p>El Electr\u00f3n fue el tercer micro m\u00e1s vendido en el Reino Unido, con cerca de 500 t\u00edtulos de software disponibles (otros dicen cerca de 1000). A pesar de ello, dejo de venderse en 1985, tras la entrada de Olivetti en el accionariado de Acorn.<\/p>\n\n\n\n<figure class=\"wp-block-table alignwide is-style-stripes\"><table><tbody><tr><td><strong>Nombre<\/strong><\/td><td>Electron<\/td><\/tr><tr><td><strong>Fabricante<\/strong><\/td><td>Acorn Computers Ltd.<\/td><\/tr><tr><td><strong>Pais<\/strong><\/td><td>U.K.<\/td><\/tr><tr><td><strong>A\u00f1o<\/strong><\/td><td>1983-1985<\/td><\/tr><tr><td><strong>Lenguaje integrado<\/strong><\/td><td>BBC BASIC<\/td><\/tr><tr><td><strong>Teclado<\/strong><\/td><td>QWERTY de 56 teclas<\/td><\/tr><tr><td><strong>CPU<\/strong><\/td><td>&nbsp;Synertek&nbsp;SY6502A @ 1,75 MHz<\/td><\/tr><tr><td><strong>RAM<\/strong><\/td><td>32 KB<\/td><\/tr><tr><td><strong>ROM<\/strong><\/td><td>32KB: 16 KB BBC BASIC y 16 KB OS<\/td><\/tr><tr><td><strong>Modos de texto<\/strong><\/td><td>40 x 25<br>80 x 25<\/td><\/tr><tr><td><strong>Modos Gr\u00e1ficos<\/strong><\/td><td>640 x 256 @ 2 colores. Texto a 80 x 32.<br>320 x 256 @ 2 o 4 colores. Texto a 40 x 32.<br>160 x 256 @ 4 o 16 colores. Texto a 20 x 32.<\/td><\/tr><tr><td><strong>Sonido<\/strong><\/td><td>1 Canal de sonido + 1 canal de ruido blanco<\/td><\/tr><tr><td><strong>Puertos de E\/S<\/strong><\/td><td>Salida de video RF (PAL)<br>Salida de video compuesto PAL<br>Salida RGB (DIN 6)<br><img decoding=\"async\" src=\"https:\/\/blog.udisks.ovh\/wp-content\/uploads\/2025\/01\/Acorn-Electron-BBC-150x150.webp\" alt=\"\">Puerto de expansi\u00f3n (con todas las se\u00f1ales de la CPU)<br>Conector de cassette (DIN-7)<\/td><\/tr><tr><td><strong>Alimentaci\u00f3n<\/strong><\/td><td><a href=\"https:\/\/www.mundocaos.com\/?p=266#Electron\" data-type=\"post\" data-id=\"266\" target=\"_blank\" rel=\"noreferrer noopener\">Fuente externa<\/a> (19V AC)<\/td><\/tr><tr><td><strong>Perif\u00e9ricos<\/strong><\/td><td>Cassette<br><a href=\"https:\/\/www.mundocaos.com\/?p=1352\" data-type=\"post\" data-id=\"1352\" target=\"_blank\" rel=\"noreferrer noopener\">Acorn Plus 1<\/a><br>Acorn Plus 3<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>El Electron utiliza como procesador un <strong>MOS 6502<\/strong>, generalmente un <strong><em>Synertek <strong>SY6502A<\/strong><\/em><\/strong> fabricado bajo licencia. Incluye 32 KB de RAM y 32 KB de ROM que incluyen el BBC BASIC. Carece de z\u00f3calos de ampliaci\u00f3n internos, pero el es ampliable mediante sockets en dispositivos de ampliaci\u00f3n.<\/p>\n\n\n\n<p>En cuanto al sonido, dispone de 3 canales virtuales independientes gestionados por la ULA, pero todos son mapeados en un \u00fanico canal f\u00edsico, y de esta forma mantener la compatibilidad con el BBC Micro. Por tanto solo hay un canal de sonido y uno de ruido blanco.<\/p>\n\n\n\n<p>El Electron era m\u00e1s lento que el BBC Model B, a pesar de utilizar el mismo procesador y la misma velocidad de reloj. Esto es debido a que las peticiones de refresco de pantalla en el Electron no se realizan de forma as\u00edncrona con la CPU, lo que provoca que se &#8220;roben&#8221; ciclos de la CPU, sobre todo en las resoluciones altas. Por tanto, la velocidad del bus en el Electron es variable, y esto hace que una gran mayor\u00eda del software para el BBC funcione a una velocidad incorrecta en el Electron.<\/p>\n\n\n\n<p>Otro de los motivos de esta lentitud con respecto al BBC Micro es que en el Electron la CPU funciona a 2MHz mientras accede a la ROM mientras que el acceso a la RAM se realiza a 1MHz, por lo que se requieren dos accesos para recuperar un solo byte.<\/p>\n\n\n\n<p>La pantalla, que tambi\u00e9n est\u00e1 controlada por la ULA, dispone de 7 de los 8 modos de pantalla del BBC:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Mode 0<\/strong>: 640 x 256 con 2 colores. Texto a 80 x 32.<\/li>\n\n\n\n<li><strong>Mode 1<\/strong>: 320 x 256 con 4 colores. Texto a 40 x 32.<\/li>\n\n\n\n<li><strong>Mode 2<\/strong>: 160 x 256 con 16 colores. Texto a 20 x 32.<\/li>\n\n\n\n<li><strong>Mode 3<\/strong>: Texto a 80 x 25 caracteres con 2 colores.<\/li>\n\n\n\n<li><strong>Mode 4<\/strong>: 320 x 256 con 2 colores. Texto a 40 x 32.<\/li>\n\n\n\n<li><strong>Mode 5<\/strong>: 160 x 256 con 4 colores. Texto a 20 x 32.<\/li>\n\n\n\n<li><strong>Mode 6<\/strong>: Texto a 40 x 25 con 2 colores.<\/li>\n<\/ul>\n\n\n\n<p>Los colores pueden escogerse libremente de una paleta de 16 (8 b\u00e1sicos con o sin parpadeo).<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"817\" height=\"657\" src=\"https:\/\/www.mundocaos.com\/wp-content\/uploads\/2025\/01\/Screen-Shot-01-20-25-at-04.10-PM.png\" alt=\"Acorn Electron\" class=\"wp-image-1549\" srcset=\"https:\/\/www.mundocaos.com\/wp-content\/uploads\/2025\/01\/Screen-Shot-01-20-25-at-04.10-PM.png 817w, https:\/\/www.mundocaos.com\/wp-content\/uploads\/2025\/01\/Screen-Shot-01-20-25-at-04.10-PM-300x241.png 300w, https:\/\/www.mundocaos.com\/wp-content\/uploads\/2025\/01\/Screen-Shot-01-20-25-at-04.10-PM-768x618.png 768w\" sizes=\"(max-width: 817px) 100vw, 817px\" \/><figcaption class=\"wp-element-caption\">Acorn Electron<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-base-color has-text-color has-background has-link-color has-large-font-size wp-elements-eaa14499090b54b8468070a5a60334d5\" style=\"border-radius:50px;background-color:#0000ff;padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\">COLECCI\u00d3N<\/h3>\n\n\n\n<p>Mi Electron funciona con su fuente de alimentaci\u00f3n original. Lo adquir\u00ed junto con un <a href=\"https:\/\/blog.udisks.ovh\/?p=1352\" data-type=\"post\" data-id=\"1352\" target=\"_blank\" rel=\"noreferrer noopener\">Electron Plus 1<\/a>, un mont\u00f3n de software original, manuales y una impresora plotter de 4 colores.<\/p>\n\n\n\n<figure class=\"wp-block-table alignwide is-style-stripes has-medium-font-size\"><table class=\"has-cyan-bluish-gray-background-color has-background has-fixed-layout\"><thead><tr><th colspan=\"4\">ACORN ELECTRON<\/th><\/tr><\/thead><tbody><tr><td>S\/N<\/td><td colspan=\"3\">04-ALA01-0061872<\/td><\/tr><tr><td>Motherboard<\/td><td colspan=\"3\">205.000 Issue 4<\/td><\/tr><tr><td>Funciona<\/td><td colspan=\"3\">SI<\/td><\/tr><tr><td>Accesorios<\/td><td colspan=\"3\"><a href=\"https:\/\/www.mundocaos.com\/?p=266#Electron\" data-type=\"link\" data-id=\"https:\/\/blog.udisks.ovh\/?p=266#Acorn_Electron\" target=\"_blank\" rel=\"noreferrer noopener\">Con fuente de alimentaci\u00f3n externa.<\/a><br><a href=\"https:\/\/www.mundocaos.com\/?p=1352\" data-type=\"post\" data-id=\"1352\" target=\"_blank\" rel=\"noreferrer noopener\">Acorn Electron Plus 1.<\/a><br>Impresora plotter de cuatro colores MicroPeripherals MCP-40.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-base-color has-text-color has-background has-link-color has-large-font-size wp-elements-7293796701901c7048795880bed89356\" style=\"border-radius:50px;background-color:#0000ff;padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\">DOCUMENTACI\u00d3N<\/h3>\n\n\n\n<div id=\"filebird-document-library\">\n   <div class=\"njt-fbdl\">\n      <script type=\"application\/json\" 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target=\"_blank\" download\n                            rel=\"noopener noreferrer\"\n                            class=\"fbdl-download-button\">Download<\/a>\n                    <\/div>\n                                    <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>                                    <\/div>\n         <div class=\"fbdl-pagination\"><\/div>      <\/div>\n   <\/div>\n<\/div>\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-base-color has-text-color has-background has-link-color has-large-font-size wp-elements-59a8ae2983b5e75be3f80ed333ffa82e\" style=\"border-radius:50px;background-color:#0000ff;padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\">SOFTWARE<\/h3>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-table alignwide\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>ID<\/strong><\/th><th colspan=\"2\"><strong>T\u00edtulo<\/strong><\/th><th>Formato<\/th><th colspan=\"2\">Comentario<\/th><\/tr><\/thead><tbody><tr><td>SLG31\/C<\/td><td colspan=\"2\">Boxer<\/td><td>Cassette<\/td><td colspan=\"2\">x2<\/td><\/tr><tr><td>SLE03\/C<\/td><td colspan=\"2\">Business Game<\/td><td>Cassette<\/td><td colspan=\"2\"><\/td><\/tr><tr><td>SLG26\/C<\/td><td colspan=\"2\">Crazy Tracer<\/td><td>Cassette<\/td><td colspan=\"2\"><\/td><\/tr><tr><td>SLB01\/C<\/td><td colspan=\"2\">Desk Diary<\/td><td>Cassette<\/td><td colspan=\"2\"><\/td><\/tr><tr><td>SLG38\/C<\/td><td colspan=\"2\">Elite v2<\/td><td>Cassette<\/td><td colspan=\"2\"><\/td><\/tr><tr><td>SLX02\/C<\/td><td colspan=\"2\">Graphs and Charts<\/td><td><\/td><\/tr><tr><td><\/td><td colspan=\"2\">Introductory Cassette<\/td><td>Cassette<\/td><td colspan=\"2\"><\/td><\/tr><tr><td>SCL18\/R<\/td><td colspan=\"2\">ISO Pascal<\/td><td>Cartucho<\/td><td colspan=\"2\">En caja con 2 manuales:<br>.- ISO PASCAL<br>.- PASCAL from BASIC<\/td><\/tr><tr><td><\/td><td colspan=\"2\">Micro Power Magic I:<br>10 Original Hits<\/td><td>Cassette<\/td><td colspan=\"2\">2 Cassettes con varios juegos. Sin car\u00e1tula<\/td><\/tr><tr><td><\/td><td colspan=\"2\">Micro Power Magic II:<br>10 Original Hits<\/td><td>Cassette<\/td><td colspan=\"2\"><br>2 Cassettes con varios juegos<\/td><\/tr><tr><td>SLG01\/C<\/td><td colspan=\"2\">Philosopher&#8217;s Quest<\/td><td>Cassette<\/td><td colspan=\"2\"><\/td><\/tr><tr><td>SLG04\/C<\/td><td colspan=\"2\">Snapper<\/td><td>Cassette<\/td><td colspan=\"2\"><\/td><\/tr><tr><td>SCB03\/R<\/td><td colspan=\"2\">VIEW<\/td><td>Cartucho<\/td><td colspan=\"2\">En caja con manual<\/td><\/tr><tr><td>SCB07\/R<\/td><td colspan=\"2\">VIEWSHEET<\/td><td>Cartucho<\/td><td colspan=\"2\"><\/td><\/tr><tr><td>SLX17\/C<\/td><td colspan=\"2\">Watch your Weight<\/td><td>Cassette<\/td><td colspan=\"2\">Manual<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-base-color has-text-color has-background has-link-color has-large-font-size wp-elements-d9b21e9237d577d58397775d4a7d3b0c\" style=\"border-radius:50px;background-color:#0000ff;padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\">ENLACES<\/h3>\n\n\n\n<p><a href=\"https:\/\/sites.google.com\/site\/jamesskingdom\/Home\/computers-exposed\/acorn-electron\">https:\/\/sites.google.com\/site\/jamesskingdom\/Home\/computers-exposed\/acorn-electron<\/a><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dise\u00f1ado por Acorn y lanzado en Julio de 1983, el Electron es una versi\u00f3n barata del Proton, m\u00e1s conocido como BBC Micro. Este era muy costoso debido a sus muchas opciones de expansi\u00f3n y a la alta calidad de construcci\u00f3n, lo que hac\u00eda que no se vendiera mucho fuera de las escuelas. En el Electron [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1351,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[133,48,69,118,132],"tags":[49,58],"class_list":["post-1121","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-133","category-acorn","category-electron","category-ok","category-uk","tag-acorn","tag-electron"],"_links":{"self":[{"href":"https:\/\/www.mundocaos.com\/index.php?rest_route=\/wp\/v2\/posts\/1121","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mundocaos.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mundocaos.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mundocaos.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mundocaos.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1121"}],"version-history":[{"count":81,"href":"https:\/\/www.mundocaos.com\/index.php?rest_route=\/wp\/v2\/posts\/1121\/revisions"}],"predecessor-version":[{"id":8442,"href":"https:\/\/www.mundocaos.com\/index.php?rest_route=\/wp\/v2\/posts\/1121\/revisions\/8442"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mundocaos.com\/index.php?rest_route=\/wp\/v2\/media\/1351"}],"wp:attachment":[{"href":"https:\/\/www.mundocaos.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1121"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mundocaos.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1121"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mundocaos.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1121"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}