{"id":650,"date":"2020-08-17T19:39:07","date_gmt":"2020-08-17T17:39:07","guid":{"rendered":"https:\/\/www.retrocomputing-whv.net\/?page_id=650"},"modified":"2021-04-09T18:04:38","modified_gmt":"2021-04-09T16:04:38","slug":"hofacker-0143-35-programme-fuer-den-zx-81","status":"publish","type":"page","link":"https:\/\/www.retrocomputing-whv.net\/?page_id=650","title":{"rendered":"Hofacker 0143 &#8211; 35 Programme f\u00fcr den ZX-81"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"713\" height=\"1024\" src=\"https:\/\/www.retrocomputing-whv.net\/wp-content\/uploads\/2020\/04\/Hofacker-143-35-Programme-f\u00fcr-den-ZX-81-713x1024.jpg\" alt=\"Hofacker 143 - 35 Programme f\u00fcr den ZX-81\" class=\"wp-image-407\" srcset=\"https:\/\/www.retrocomputing-whv.net\/wp-content\/uploads\/2020\/04\/Hofacker-143-35-Programme-f\u00fcr-den-ZX-81-713x1024.jpg 713w, https:\/\/www.retrocomputing-whv.net\/wp-content\/uploads\/2020\/04\/Hofacker-143-35-Programme-f\u00fcr-den-ZX-81-209x300.jpg 209w, https:\/\/www.retrocomputing-whv.net\/wp-content\/uploads\/2020\/04\/Hofacker-143-35-Programme-f\u00fcr-den-ZX-81-768x1103.jpg 768w, https:\/\/www.retrocomputing-whv.net\/wp-content\/uploads\/2020\/04\/Hofacker-143-35-Programme-f\u00fcr-den-ZX-81-1070x1536.jpg 1070w, https:\/\/www.retrocomputing-whv.net\/wp-content\/uploads\/2020\/04\/Hofacker-143-35-Programme-f\u00fcr-den-ZX-81.jpg 1200w\" sizes=\"auto, (max-width: 713px) 100vw, 713px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Hofacker-B\u00fccher &#8211; Nr. 143 &#8211; Autor Roland G. H\u00fclsmann<br>1. Auflage &#8211; Erscheinungsjahr 1983 &#8211; ISBN 3-921682-99-1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Inhaltsverzeichnis:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Allgemeine Tips und Hinweise<\/strong><ul><li>So wird Speicherplatz gespart<ul><li>Wieviel Speicherplatz habe ich noch?<\/li><li>Die Zeilenzahl reduzieren<\/li><li>Zahlen im Listing vermeiden<ul><li>&#8230; durch den Einsatz von Variablen<\/li><li>&#8230; durch den Einsatz von Bedingungen<\/li><li>&#8230; durch den Einsatz von VAL<\/li><\/ul><\/li><li>Einsatz von Zeilen ohne Zeilennummern<\/li><\/ul><\/li><li>Betreiben des ZX81 mit dem 8K-ROM des ZX80<\/li><li>Bedienelemente f\u00fcr schnelle Spiele<ul><li>Das Problem<\/li><li>Die L\u00f6sung<\/li><li>Bauanleitung<ul><li>Material<\/li><li>Einbau der Buchse in den ZX81<\/li><li>Basteln der Bedienelemente<\/li><\/ul><\/li><\/ul><\/li><li>Interaktive Graphik mit dem ZX81<ul><li>Die Organisation des Video-Speichers<\/li><li>Wie POKEn in den Video-RAM<\/li><li>24-Zeichen-Display<\/li><li>Der ZX81 als Graphik-K\u00fcnstler<\/li><li>Interaktion mit PEEK und POKE<\/li><li>Eine &#8222;sehende&#8220; Raupe<\/li><\/ul><\/li><\/ul><\/li><li><strong>10 Programme f\u00fcr den ZX81 mit 1K-RAM<\/strong><ul><li>Programm 1 &#8211; Meteor<\/li><li>Programm 2 &#8211; Space Invader<\/li><li>Programm 3 &#8211; Mondlandung<\/li><li>Programm 4 &#8211; Treibmine<\/li><li>Programm 5 &#8211; Minisector<ul><li>Minisector I<\/li><li>Minisector II<\/li><\/ul><\/li><li>Programm 6 &#8211; Ari<\/li><li>Programm 7 &#8211; Ballistik<\/li><li>Programm 8 &#8211; Spielautomat<\/li><li>Programm 9 &#8211; Irrgarten<\/li><li>Programm 10 &#8211; Todesh\u00f6hle<\/li><\/ul><\/li><li><strong>Unterprogramme in Maschinensprache<\/strong><ul><li>Zur Plazierung von Unterprogrammen in Maschinensprache<\/li><li>Zwei Programme, um Maschinencode zu laden<ul><li>Programm 11 &#8211; Hex-Loader I<\/li><li>Programm 12 &#8211; Hex-Loader II<\/li><\/ul><\/li><li>Programm 13 &#8211; Screen-Loader<\/li><li>Programm 14 &#8211; Spielfeld<\/li><li>Programme 15 + 16 &#8211; Downscroll + Inversion<\/li><li>Superscroll &#8211; Scrollen in alle Richtungen<ul><li>Programm 17 &#8211; High-Scroll<\/li><li>Programm 18 &#8211; Down-Scroll<\/li><li>Programm 19 &#8211; Left-Scroll<\/li><li>Programm 20 &#8211; Right-Scroll<\/li><li>Superscroll &#8211; Alle zusammen<\/li><\/ul><\/li><\/ul><\/li><li><strong>Zw\u00f6lf BASIC-Programme f\u00fcr den ZX81 mit 16K-RAM<\/strong><ul><li>Programm 21 &#8211; LP-Register<\/li><li>Programm 22 &#8211; Kartei<ul><li>Einrichten der Kartei<\/li><li>Benutzen der Kartei<\/li><li>Sie haben mehr &#8222;RAM&#8220;?<\/li><\/ul><\/li><li>Programm 23 &#8211; Haushaltsbuchf\u00fchrung<\/li><li>Programm 24 &#8211; Mondphasen<\/li><li>Programm 25 &#8211; Biorhythmus<\/li><li>Programm 26 &#8211; Uhr<\/li><li>Programm 27 &#8211; Buchstaben-Puzzle<\/li><li>Programm 28 &#8211; Das Monsterspiel<\/li><li>Programm 29 &#8211; Bombendrohung<\/li><li>Programm 30 &#8211; Minenfeld<\/li><li>Programm 31 &#8211; ZX-Sector<\/li><li>Programm 32 &#8211; Star-Treck<\/li><\/ul><\/li><li><strong>Drei Programme in Maschinensprach<\/strong>e<ul><li>Programm 33 &#8211; Ballspiele<\/li><li>Programm 34 &#8211; Flipper<\/li><li>Programm 35 &#8211; Game of Life<\/li><\/ul><\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.retrocomputing-whv.net\/?page_id=1230\"><img loading=\"lazy\" decoding=\"async\" width=\"256\" height=\"136\" src=\"https:\/\/www.retrocomputing-whv.net\/wp-content\/uploads\/2020\/08\/Backspace.jpg\" alt=\"Backspace\" class=\"wp-image-681\"\/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hofacker-B\u00fccher &#8211; Nr. 143 &#8211; Autor Roland G. H\u00fclsmann1. Auflage &#8211; Erscheinungsjahr 1983 &#8211; ISBN 3-921682-99-1 Inhaltsverzeichnis: Allgemeine Tips und Hinweise So wird Speicherplatz gespart Wieviel Speicherplatz habe ich noch? Die Zeilenzahl reduzieren Zahlen im Listing vermeiden &#8230; durch den Einsatz von Variablen &#8230; durch den Einsatz von Bedingungen &#8230; durch den Einsatz von VAL Einsatz von Zeilen ohne Zeilennummern<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1230,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-650","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Hofacker 0143 - 35 Programme f\u00fcr den ZX-81 - Retrocomputing WHV<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.retrocomputing-whv.net\/?page_id=650\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hofacker 0143 - 35 Programme f\u00fcr den ZX-81 - Retrocomputing WHV\" \/>\n<meta property=\"og:description\" content=\"Hofacker-B\u00fccher &#8211; Nr. 143 &#8211; Autor Roland G. H\u00fclsmann1. Auflage &#8211; Erscheinungsjahr 1983 &#8211; ISBN 3-921682-99-1 Inhaltsverzeichnis: Allgemeine Tips und Hinweise So wird Speicherplatz gespart Wieviel Speicherplatz habe ich noch? Die Zeilenzahl reduzieren Zahlen im Listing vermeiden &#8230; durch den Einsatz von Variablen &#8230; durch den Einsatz von Bedingungen &#8230; durch den Einsatz von VAL Einsatz von Zeilen ohne Zeilennummern\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.retrocomputing-whv.net\/?page_id=650\" \/>\n<meta property=\"og:site_name\" content=\"Retrocomputing WHV\" \/>\n<meta property=\"article:modified_time\" content=\"2021-04-09T16:04:38+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.retrocomputing-whv.net\/wp-content\/uploads\/2020\/04\/Hofacker-143-35-Programme-f\u00fcr-den-ZX-81-713x1024.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Gesch\u00e4tzte Lesezeit\" \/>\n\t<meta name=\"twitter:data1\" content=\"2\u00a0Minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/?page_id=650\",\"url\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/?page_id=650\",\"name\":\"Hofacker 0143 - 35 Programme f\u00fcr den ZX-81 - Retrocomputing WHV\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/?page_id=650#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/?page_id=650#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/wp-content\\\/uploads\\\/2020\\\/08\\\/Backspace.jpg\",\"datePublished\":\"2020-08-17T17:39:07+00:00\",\"dateModified\":\"2021-04-09T16:04:38+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/?page_id=650#breadcrumb\"},\"inLanguage\":\"de\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.retrocomputing-whv.net\\\/?page_id=650\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"de\",\"@id\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/?page_id=650#primaryimage\",\"url\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/wp-content\\\/uploads\\\/2020\\\/08\\\/Backspace.jpg\",\"contentUrl\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/wp-content\\\/uploads\\\/2020\\\/08\\\/Backspace.jpg\",\"width\":256,\"height\":136,\"caption\":\"Backspace\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/?page_id=650#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Startseite\",\"item\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Literatur\",\"item\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/?page_id=105\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Hofacker\",\"item\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/?page_id=1230\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Hofacker 0143 &#8211; 35 Programme f\u00fcr den ZX-81\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/#website\",\"url\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/\",\"name\":\"Retrocomputing WHV\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"de\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/#organization\",\"name\":\"Retrocomputing-WHV\",\"url\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"de\",\"@id\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/wp-content\\\/uploads\\\/2020\\\/04\\\/Logo.png\",\"contentUrl\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/wp-content\\\/uploads\\\/2020\\\/04\\\/Logo.png\",\"width\":1340,\"height\":250,\"caption\":\"Retrocomputing-WHV\"},\"image\":{\"@id\":\"https:\\\/\\\/www.retrocomputing-whv.net\\\/#\\\/schema\\\/logo\\\/image\\\/\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Hofacker 0143 - 35 Programme f\u00fcr den ZX-81 - Retrocomputing WHV","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.retrocomputing-whv.net\/?page_id=650","og_locale":"de_DE","og_type":"article","og_title":"Hofacker 0143 - 35 Programme f\u00fcr den ZX-81 - Retrocomputing WHV","og_description":"Hofacker-B\u00fccher &#8211; Nr. 143 &#8211; Autor Roland G. H\u00fclsmann1. Auflage &#8211; Erscheinungsjahr 1983 &#8211; ISBN 3-921682-99-1 Inhaltsverzeichnis: Allgemeine Tips und Hinweise So wird Speicherplatz gespart Wieviel Speicherplatz habe ich noch? Die Zeilenzahl reduzieren Zahlen im Listing vermeiden &#8230; durch den Einsatz von Variablen &#8230; durch den Einsatz von Bedingungen &#8230; durch den Einsatz von VAL Einsatz von Zeilen ohne Zeilennummern","og_url":"https:\/\/www.retrocomputing-whv.net\/?page_id=650","og_site_name":"Retrocomputing WHV","article_modified_time":"2021-04-09T16:04:38+00:00","og_image":[{"url":"https:\/\/www.retrocomputing-whv.net\/wp-content\/uploads\/2020\/04\/Hofacker-143-35-Programme-f\u00fcr-den-ZX-81-713x1024.jpg","type":"","width":"","height":""}],"twitter_card":"summary_large_image","twitter_misc":{"Gesch\u00e4tzte Lesezeit":"2\u00a0Minuten"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.retrocomputing-whv.net\/?page_id=650","url":"https:\/\/www.retrocomputing-whv.net\/?page_id=650","name":"Hofacker 0143 - 35 Programme f\u00fcr den ZX-81 - Retrocomputing WHV","isPartOf":{"@id":"https:\/\/www.retrocomputing-whv.net\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.retrocomputing-whv.net\/?page_id=650#primaryimage"},"image":{"@id":"https:\/\/www.retrocomputing-whv.net\/?page_id=650#primaryimage"},"thumbnailUrl":"https:\/\/www.retrocomputing-whv.net\/wp-content\/uploads\/2020\/08\/Backspace.jpg","datePublished":"2020-08-17T17:39:07+00:00","dateModified":"2021-04-09T16:04:38+00:00","breadcrumb":{"@id":"https:\/\/www.retrocomputing-whv.net\/?page_id=650#breadcrumb"},"inLanguage":"de","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.retrocomputing-whv.net\/?page_id=650"]}]},{"@type":"ImageObject","inLanguage":"de","@id":"https:\/\/www.retrocomputing-whv.net\/?page_id=650#primaryimage","url":"https:\/\/www.retrocomputing-whv.net\/wp-content\/uploads\/2020\/08\/Backspace.jpg","contentUrl":"https:\/\/www.retrocomputing-whv.net\/wp-content\/uploads\/2020\/08\/Backspace.jpg","width":256,"height":136,"caption":"Backspace"},{"@type":"BreadcrumbList","@id":"https:\/\/www.retrocomputing-whv.net\/?page_id=650#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Startseite","item":"https:\/\/www.retrocomputing-whv.net\/"},{"@type":"ListItem","position":2,"name":"Literatur","item":"https:\/\/www.retrocomputing-whv.net\/?page_id=105"},{"@type":"ListItem","position":3,"name":"Hofacker","item":"https:\/\/www.retrocomputing-whv.net\/?page_id=1230"},{"@type":"ListItem","position":4,"name":"Hofacker 0143 &#8211; 35 Programme f\u00fcr den ZX-81"}]},{"@type":"WebSite","@id":"https:\/\/www.retrocomputing-whv.net\/#website","url":"https:\/\/www.retrocomputing-whv.net\/","name":"Retrocomputing WHV","description":"","publisher":{"@id":"https:\/\/www.retrocomputing-whv.net\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.retrocomputing-whv.net\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"de"},{"@type":"Organization","@id":"https:\/\/www.retrocomputing-whv.net\/#organization","name":"Retrocomputing-WHV","url":"https:\/\/www.retrocomputing-whv.net\/","logo":{"@type":"ImageObject","inLanguage":"de","@id":"https:\/\/www.retrocomputing-whv.net\/#\/schema\/logo\/image\/","url":"https:\/\/www.retrocomputing-whv.net\/wp-content\/uploads\/2020\/04\/Logo.png","contentUrl":"https:\/\/www.retrocomputing-whv.net\/wp-content\/uploads\/2020\/04\/Logo.png","width":1340,"height":250,"caption":"Retrocomputing-WHV"},"image":{"@id":"https:\/\/www.retrocomputing-whv.net\/#\/schema\/logo\/image\/"}}]}},"_links":{"self":[{"href":"https:\/\/www.retrocomputing-whv.net\/index.php?rest_route=\/wp\/v2\/pages\/650","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.retrocomputing-whv.net\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.retrocomputing-whv.net\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.retrocomputing-whv.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.retrocomputing-whv.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=650"}],"version-history":[{"count":2,"href":"https:\/\/www.retrocomputing-whv.net\/index.php?rest_route=\/wp\/v2\/pages\/650\/revisions"}],"predecessor-version":[{"id":1563,"href":"https:\/\/www.retrocomputing-whv.net\/index.php?rest_route=\/wp\/v2\/pages\/650\/revisions\/1563"}],"up":[{"embeddable":true,"href":"https:\/\/www.retrocomputing-whv.net\/index.php?rest_route=\/wp\/v2\/pages\/1230"}],"wp:attachment":[{"href":"https:\/\/www.retrocomputing-whv.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=650"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}