{"id":987,"date":"2014-11-27T19:31:59","date_gmt":"2014-11-27T19:31:59","guid":{"rendered":"http:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/?p=987"},"modified":"2025-11-02T17:56:20","modified_gmt":"2025-11-02T17:56:20","slug":"sharp-el-556","status":"publish","type":"post","link":"https:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/?p=987","title":{"rendered":"SHARP EL-556"},"content":{"rendered":"<p><a href=\"http:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/wp-content\/uploads\/2022\/08\/SHARP_556-4.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-5498 \" src=\"http:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/wp-content\/uploads\/2022\/08\/SHARP_556-4.jpg\" alt=\"\" width=\"415\" height=\"629\" srcset=\"https:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/wp-content\/uploads\/2022\/08\/SHARP_556-4.jpg 531w, https:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/wp-content\/uploads\/2022\/08\/SHARP_556-4-198x300.jpg 198w\" sizes=\"auto, (max-width: 415px) 100vw, 415px\" \/><\/a><\/p>\n<p style=\"text-align: justify;\">Le mod\u00e8le <em>EL-556<\/em> figure parmi les plus tardifs des petites <em>SHARP<\/em> m\u00e9talliques de la d\u00e9cennie 80, tr\u00e8s semblable aux coloris pr\u00e8s \u00e0 la <em><a title=\"SHARP EL-506A\" href=\"http:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/?p=1015\">EL-506A<\/a><\/em>.\u00a0Son mill\u00e9sime : 1988.<\/p>\n<p style=\"text-align: justify;\">Soumis aux m\u00eames tests de pr\u00e9cision, on y devine deux processeurs distincts \u00e0 l&rsquo;oeuvre.<\/p>\n<p style=\"text-align: justify;\">Concernant le test de cumul des sinus des 359 premiers degr\u00e9 entiers),<\/p>\n<p style=\"text-align: justify;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-5492\" src=\"http:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/wp-content\/uploads\/2022\/08\/SHARP_556-5-300x256.jpg\" alt=\"\" width=\"300\" height=\"256\" srcset=\"https:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/wp-content\/uploads\/2022\/08\/SHARP_556-5-300x256.jpg 300w, https:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/wp-content\/uploads\/2022\/08\/SHARP_556-5.jpg 626w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p style=\"text-align: justify;\">nous sommes dans les deux cas proches de la valeur th\u00e9orique z\u00e9ro, avec une\u00a0<em>506A<\/em>\u00a0qui s&rsquo;en approche davantage.<\/p>\n<p style=\"text-align: justify;\">Autre test, le bien connu\u00a0<em>Forensics<\/em> (*)<\/p>\n<p style=\"text-align: justify;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-5495\" src=\"http:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/wp-content\/uploads\/2022\/08\/SHARP_556-7-300x259.jpg\" alt=\"\" width=\"300\" height=\"259\" srcset=\"https:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/wp-content\/uploads\/2022\/08\/SHARP_556-7-300x259.jpg 300w, https:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/wp-content\/uploads\/2022\/08\/SHARP_556-7.jpg 654w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>\u00c9cart \u00e0 9 :<\/p>\n<p style=\"text-align: justify;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-5494\" src=\"http:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/wp-content\/uploads\/2022\/08\/SHARP_556-6-300x268.jpg\" alt=\"\" width=\"290\" height=\"259\" srcset=\"https:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/wp-content\/uploads\/2022\/08\/SHARP_556-6-300x268.jpg 300w, https:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/wp-content\/uploads\/2022\/08\/SHARP_556-6.jpg 606w\" sizes=\"auto, (max-width: 290px) 100vw, 290px\" \/><\/p>\n<p style=\"text-align: justify;\">Cette fois, nous devrions retrouver un valeur avoisinant 9. Nous en sommes proches mais, soustraction de 9 faite, nous constatons que l&rsquo;\u00e9cart renvoy\u00e9 par la <em>556<\/em> est plus petit, donc meilleur. Un partout. Notons que les deux r\u00e9sultats \u00e9chouent tout autant \u00e0 retrouver la valeur arithm\u00e9tiquement exacte pour une expression num\u00e9rique sur 12 chiffres : 8,99999864267.<\/p>\n<p style=\"text-align: justify;\">Un dernier test, avec\u00a0la fonction\u00a0<em>Factorielle<\/em>, qui se borne classiquement \u00e0 renvoyer le r\u00e9sultat d&rsquo;une cha\u00eenes de multiplications.<\/p>\n<p style=\"text-align: justify;\">Comme attendu, les deux machines calculent les factorielles jusqu&rsquo;\u00e0 la valeur 69, au del\u00e0 de laquelle on assiste \u00e0 l&rsquo;apparition du t\u00e9moin d&rsquo;erreur d\u00fb au d\u00e9passement de la capacit\u00e9 de calcul. Le comportement semble habituel pour les deux machines mais l&rsquo;\u0153il attentif d\u00e9c\u00e8le quand m\u00eame une diff\u00e9rence : La <em>556<\/em> refuse tout net de calculer la factorielle de 70 et interpose sans d\u00e9lai le t\u00e9moin d&rsquo;erreur. Tandis que la <em>506<\/em> lance sans broncher la longue suite d&rsquo;op\u00e9rations, qui aboutira au m\u00eame t\u00e9moin d&rsquo;erreur, mais en fin de calcul.<\/p>\n<p style=\"text-align: justify;\">Le micro programme de la <em>556<\/em>\u00a0a su rep\u00e9rer une valeur hors domaine et pas la <em>506<\/em>. Pour\u00a0\u00eatre honn\u00eate, reconnaissons que la <em>506<\/em>\u00a0fait bien la v\u00e9rification, mais seulement \u00e0 partir de 100.<\/p>\n<p style=\"text-align: justify;\">(*) <a href=\"https:\/\/www.rskey.org\/~mwsebastian\/miscprj\/forensics.htm\">https:\/\/www.rskey.org\/~mwsebastian\/miscprj\/forensics.htm<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le mod\u00e8le EL-556 figure parmi les plus tardifs des petites SHARP m\u00e9talliques de la d\u00e9cennie 80, tr\u00e8s semblable aux coloris pr\u00e8s \u00e0 la EL-506A.\u00a0Son mill\u00e9sime : 1988. Soumis aux m\u00eames tests de pr\u00e9cision, on y devine deux processeurs distincts \u00e0 l&rsquo;oeuvre. Concernant le test de cumul des sinus des 359 premiers degr\u00e9 entiers), nous sommes dans les deux cas proches<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,14],"tags":[],"class_list":["post-987","post","type-post","status-publish","format-standard","hentry","category-age-dor-du-calcul","category-sharp"],"_links":{"self":[{"href":"https:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/index.php?rest_route=\/wp\/v2\/posts\/987","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=987"}],"version-history":[{"count":16,"href":"https:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/index.php?rest_route=\/wp\/v2\/posts\/987\/revisions"}],"predecessor-version":[{"id":8604,"href":"https:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/index.php?rest_route=\/wp\/v2\/posts\/987\/revisions\/8604"}],"wp:attachment":[{"href":"https:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=987"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=987"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/le-rayon-des-calculatrices.fr\/WordPress3\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=987"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}