{"id":1516,"date":"2025-01-20T18:14:07","date_gmt":"2025-01-20T17:14:07","guid":{"rendered":"https:\/\/blog.udisks.ovh\/?p=1516"},"modified":"2025-10-13T16:38:10","modified_gmt":"2025-10-13T14:38:10","slug":"microbee-32","status":"publish","type":"post","link":"https:\/\/www.mundocaos.com\/?p=1516","title":{"rendered":"Microbee 32"},"content":{"rendered":"\n<p>En 1978, Owen Hill se asoci\u00f3 con la empresa de componentes electr\u00f3nicos Applied Technology, en Sydney, para construir un peque\u00f1o ordenador que hab\u00eda dise\u00f1ado. Applied Technology ya hab\u00eda estado produciendo kits en Australia para placas S-100.<\/p>\n\n\n\n<p>Inicialmente el ordenador se lanz\u00f3 en forma de kit, con instrucciones de montaje incluidas en el n\u00famero de Febrero de 1982 de la revista <strong><em>Your Computer<\/em><\/strong>. Fue un \u00e9xito inmediato, al ser un microordenador bastante potente para su coste.<\/p>\n\n\n\n<p>Applied Technology cambi\u00f3 su nombre a MicroBee Systems Limited y vendi\u00f3 versiones ya ensambladas. Su mercado principal eran las escuelas australianas, al ganar una licitaci\u00f3n del Departamento de Educaci\u00f3n de Nueva Gales del Sur.<\/p>\n\n\n\n<p>La ROM de 16 kB contienen el int\u00e9rprete <strong>BASIC MicroWorld, <\/strong>escrito por Matthew Starr, y el monitor del sistema <strong>DGOS<\/strong> (sistema operativo David Griffiths). Adem\u00e1s de la ROM de 16 kB, hay un z\u00f3calo de ROM adicional para programas opcionales como WORDBEE (procesador de textos) o EDASM (un editor\/ensamblador Z80 escrito por Ron Harris).<\/p>\n\n\n\n<p>Sus caracter\u00edsticas m\u00e1s distintivas son su pantalla de video configurable por el usuario, capaz de imitar las pantallas de otras computadoras y dispositivos, y su RAM no vol\u00e1til respaldada por bater\u00eda (por el tipo de conector parece una pila de 9V).<\/p>\n\n\n\n<p>Originalmente consta de 2 placas superpuestas: una &#8220;placa base&#8221; inferior que contiene todos los componentes excepto la memoria del sistema, la cual esta montada en la &#8220;placa central&#8221; superior. En la placa de memoria hay disponibles varios sockets para ROM&#8217;s de 8KB, con una capacidad m\u00e1xima de 32 KB.<\/p>\n\n\n\n<figure class=\"wp-block-table alignwide is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th colspan=\"4\">Especificaciones T\u00e9cnicas<\/th><\/tr><\/thead><tbody><tr><td><strong>Nombre<\/strong><\/td><td colspan=\"3\">Microbee 32<\/td><\/tr><tr><td><strong>Fabricante<\/strong><\/td><td colspan=\"3\">Applied Technology<\/td><\/tr><tr><td><strong>Pais<\/strong><\/td><td colspan=\"3\">Australia<\/td><\/tr><tr><td><strong>A\u00f1o<\/strong><\/td><td colspan=\"3\">1982<\/td><\/tr><tr><td><strong>Lenguaje integrado<\/strong><\/td><td colspan=\"3\">BASIC MicroWorld<\/td><\/tr><tr><td><strong>Teclado<\/strong><\/td><td colspan=\"3\"><\/td><\/tr><tr><td><strong>CPU<\/strong><\/td><td colspan=\"3\">&nbsp;Z80<\/td><\/tr><tr><td><strong>Coprocesadores<\/strong><\/td><td colspan=\"3\">Z80 PIO<br>GPU MOS\/Rockwell CRT 6545<\/td><\/tr><tr><td><strong>RAM<\/strong><\/td><td colspan=\"3\">32KB no vol\u00e1til<\/td><\/tr><tr><td><strong>VRAM<\/strong><\/td><td colspan=\"3\">2KB<br>2KB PCG (128 caracteres gr\u00e1ficos programables )<\/td><\/tr><tr><td><strong>ROM<\/strong><\/td><td colspan=\"3\">2 KB caracteres<br>16 KB ROM BASIC o ROM BOOT de 4 KB<\/td><\/tr><tr><td><strong>Modos de Texto<\/strong><\/td><td colspan=\"3\">64&#215;16<\/td><\/tr><tr><td><strong>Modos Gr\u00e1ficos<\/strong><\/td><td colspan=\"3\">512&#215;256 p\u00edxeles<\/td><\/tr><tr><td><strong>Sonido<\/strong><\/td><td colspan=\"3\"><\/td><\/tr><tr><td><strong>Puertos de E\/S<\/strong><\/td><td colspan=\"3\">Entrada\/salida de cinta<br>Salida de v\u00eddeo<br>Puerto serie<br>Puerto paralelo de usuario<br>Puerto de expansi\u00f3n del sistema de 50 v\u00edas<\/td><\/tr><tr><td><strong>Alimentaci\u00f3n<\/strong><\/td><td colspan=\"3\"><a href=\"https:\/\/www.mundocaos.com\/?p=266\" data-type=\"post\" data-id=\"266\" target=\"_blank\" rel=\"noreferrer noopener\">Fuente externa<\/a> 12V CC<\/td><\/tr><tr><td><strong>Perif\u00e9ricos<\/strong><\/td><td colspan=\"3\">Unidad de disquete.<br>Unidad de expansi\u00f3n de bus S-100.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>El microbee tiene dos opciones de red: BeeNet y StarNet.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>BeeNet<\/strong> era una red de \u00e1rea local (LAN) de bajo costo y baja velocidad para modelos de ROM de 16-32K. Utiliza una topolog\u00eda de bus que con transferencias seriales sincr\u00f3nicas.<\/li>\n\n\n\n<li> <strong>StarNet<\/strong>: Red para modelos de DRAM de 64K y mayores. Como su nomobre indica, utiliza una topolog\u00eda de estrella simple que utiliza conexiones de bus de datos paralelos de 8 bits dedicados entre el concentrador central y sus radios remotos.<\/li>\n<\/ul>\n\n\n\n\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<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\"><br>MicroBee<\/th><\/tr><\/thead><tbody><tr><td>Modelo<\/td><td colspan=\"3\">MICROBEE MODEL II<\/td><\/tr><tr><td>Fabricante<\/td><td colspan=\"3\">Microworld PTY LTD<\/td><\/tr><tr><td>S\/N<\/td><td colspan=\"3\">86731<\/td><\/tr><tr><td>Funciona<\/td><td colspan=\"3\">SI. Fallan algunas teclas.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Mientras buscaba informaci\u00f3n sobre el del Microbee 32 me encontr\u00e9 la siguiente informaci\u00f3n (completa en <a href=\"https:\/\/microbeetechnology.com.au\/forum\/thread-206.html\" data-type=\"link\" data-id=\"https:\/\/microbeetechnology.com.au\/forum\/thread-206.html\" target=\"_blank\" rel=\"noreferrer noopener\">Microbee Technology Forum<\/a>):<\/p>\n\n\n\n<blockquote class=\"wp-block-quote has-tertiary-background-color has-background is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"has-medium-font-size\">La fuente de alimentaci\u00f3n original de Microbee de 12V lo que hace es quemar los condensadores de t\u00e1ntalo que se encuentran cerca de los reguladores de voltaje.<\/p>\n\n\n\n<p class=\"has-medium-font-size\">Parece que el Microbee monitoriza la tensi\u00f3n de entrada en el circuito de &#8220;<em>Jump on Power<\/em>&#8221; y &#8220;<em>Reset<\/em>&#8221; mediante un divisor de voltaje formado por dos resistencias, y necesita un m\u00ednimo de tensi\u00f3n para encender.<\/p>\n\n\n\n<p class=\"has-medium-font-size\">Durante la evoluci\u00f3n del Microbee, se usaron diferentes voltajes de entrada. Los originales que se distribu\u00edan en kit con 12 V CA, mientras que los modelos posteriores usaron fuentes de alimentaci\u00f3n con un rango de tensiones entre 9 y 12V CC. Sin embargo el utilizar 12V hac\u00eda que el Microbee disipara mucho calor.<\/p>\n\n\n\n<p class=\"has-medium-font-size\">Se selecciono como voltaje nominal 10V, ya que con 8-9V CC es posible que no arranque, y con 12V lo normal es que se quemen los condensadores de t\u00e1ntalo.<\/p>\n<\/blockquote>\n\n\n\n<p>Aunque tengo la fuente de alimentaci\u00f3n original, en vista de lo que comentan, he hecho un cable para el conector DIN 5 utilizado para la alimentaci\u00f3n y la salida de v\u00eddeo compuesto. Luego he conectado el cable a una fuente de alimentaci\u00f3n variable que ten\u00eda de un port\u00e1til antiguo (12V-20 CC) con un convertidor DC-DC (con volt\u00edmetro integrado) de por medio.<\/p>\n\n\n\n<p>He probado inicialmente con 9V y no ha arrancado. Sin embargo, con 10V si que ha funcionado.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"657\" height=\"657\" src=\"https:\/\/www.mundocaos.com\/wp-content\/uploads\/2025\/01\/Screen-Shot-01-21-25-at-02.32-PM.png\" alt=\"Microbee 32 - MicroWorld Level II BASIC\" class=\"wp-image-1605\" srcset=\"https:\/\/www.mundocaos.com\/wp-content\/uploads\/2025\/01\/Screen-Shot-01-21-25-at-02.32-PM.png 657w, https:\/\/www.mundocaos.com\/wp-content\/uploads\/2025\/01\/Screen-Shot-01-21-25-at-02.32-PM-300x300.png 300w, https:\/\/www.mundocaos.com\/wp-content\/uploads\/2025\/01\/Screen-Shot-01-21-25-at-02.32-PM-150x150.png 150w\" sizes=\"(max-width: 657px) 100vw, 657px\" \/><figcaption class=\"wp-element-caption\">Microbee 32 &#8211; MicroWorld Level II BASIC<\/figcaption><\/figure>\n\n\n\n<p>El \u00fanico problema es que fallan algunas teclas. Se pueden limpiar, pero hay que desoldarlas de la placa base para revisar todos sus partes:<\/p>\n\n\n\n<figure class=\"wp-block-image alignwide size-large\"><img decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.mundocaos.com\/wp-content\/uploads\/2025\/01\/IMG_7941-1024x768.jpg\" alt=\"\" class=\"wp-image-1849\" srcset=\"https:\/\/www.mundocaos.com\/wp-content\/uploads\/2025\/01\/IMG_7941-1024x768.jpg 1024w, https:\/\/www.mundocaos.com\/wp-content\/uploads\/2025\/01\/IMG_7941-300x225.jpg 300w, https:\/\/www.mundocaos.com\/wp-content\/uploads\/2025\/01\/IMG_7941-768x576.jpg 768w, https:\/\/www.mundocaos.com\/wp-content\/uploads\/2025\/01\/IMG_7941-1536x1152.jpg 1536w, https:\/\/www.mundocaos.com\/wp-content\/uploads\/2025\/01\/IMG_7941.jpg 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><a href=\"https:\/\/www.nightfallcrew.com\/24\/07\/2013\/microbee-pc-85-model-ii-keyboard-repair\">https:\/\/www.nightfallcrew.com\/24\/07\/2013\/microbee-pc-85-model-ii-keyboard-repair<\/a><\/p>\n\n\n\n<h2 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-70a13e5ef164c1d412022941d4259f6b\" style=\"border-radius:50px;background-color:#0000ff;padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\">DOCUMENTACI\u00d3N<\/h2>\n\n\n\n<div id=\"filebird-document-library\">\n   <div class=\"njt-fbdl\">\n      <script type=\"application\/json\" 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<\/div>\n                        <\/div>\n                        <a href=\"https:\/\/www.mundocaos.com\/wp-content\/uploads\/2025\/09\/TM59-DM10-1_MicroB_Technical_Users_Manual_Nov79.pdf\" 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<h2 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-cefa63bcb1c0522ae2619adef3e55bb9\" style=\"border-radius:50px;background-color:#0000ff;padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\">ENLACES<\/h2>\n\n\n\n<p><a href=\"https:\/\/github.com\/rweather\/microbee-restoration\">https:\/\/github.com\/rweather\/microbee-restoration<\/a><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>En 1978, Owen Hill se asoci\u00f3 con la empresa de componentes electr\u00f3nicos Applied Technology, en Sydney, para construir un peque\u00f1o ordenador que hab\u00eda dise\u00f1ado. Applied Technology ya hab\u00eda estado produciendo kits en Australia para placas S-100. Inicialmente el ordenador se lanz\u00f3 en forma de kit, con instrucciones de montaje incluidas en el n\u00famero de Febrero [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1720,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[118,17],"tags":[72,73,86,20],"class_list":["post-1516","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ok","category-ordenadores-varios","tag-applied-technology","tag-microbee","tag-microbee-32","tag-ordenadores_varios"],"_links":{"self":[{"href":"https:\/\/www.mundocaos.com\/index.php?rest_route=\/wp\/v2\/posts\/1516","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=1516"}],"version-history":[{"count":67,"href":"https:\/\/www.mundocaos.com\/index.php?rest_route=\/wp\/v2\/posts\/1516\/revisions"}],"predecessor-version":[{"id":8425,"href":"https:\/\/www.mundocaos.com\/index.php?rest_route=\/wp\/v2\/posts\/1516\/revisions\/8425"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mundocaos.com\/index.php?rest_route=\/wp\/v2\/media\/1720"}],"wp:attachment":[{"href":"https:\/\/www.mundocaos.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1516"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mundocaos.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1516"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mundocaos.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1516"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}