grand nombre de d\u00e9riv\u00e9s<\/a> (utilis\u00e9s dans le C64, l’Apple \/\/c, la PC Engine, etc). Il tournait \u00e0 1,77Mhz dans la version europ\u00e9enne, ce qui peut \u00eatre consid\u00e9r\u00e9 comme puissant quand on voit que les autres machines tournaient aux alentours de 1Mhz (on commen\u00e7ait tout juste \u00e0 compter en Mhz, certaines sp\u00e9cifications de l’\u00e9poque montraient encore les fr\u00e9quence d’horloge en kHz). Pour avoir un point de comparaison un peu plus parlant, il est utile de rappeler que le CPC tournait, lui, \u00e0 4Mhz, et le ST et l’Amiga aux alentours de 7-8Mhz. Le XL est aussi beaucoup moins puissant (dix fois, vingt fois moins puissant ?) que la plupart des calculatrices scientifiques actuelles.
\nPar contre, le processeur graphique avait l’air assez puissant, avec notamment un syst\u00e8me de mode graphique software int\u00e9ressant mais qui bouffe \u00e9norm\u00e9ment de m\u00e9moire. Wikipedia indique que le XL est le premier ordinateur \u00e0 avoir eu des coprocesseurs d\u00e9di\u00e9s, mais je me gerderai bien d’affirmer la m\u00eame chose par manque de connaissances sur ce genre d’historique. Par contre je pense que c’est pour cette raison que Numen demande 320ko de RAM pour fonctionner, l\u00e0 o\u00f9 la configuration dite \u00ab\u00a0standard\u00a0\u00bb de l’Atari XL\/XE a 64ko de RAM. C’est pour cette raison, d’ailleurs, que j’ai rajout\u00e9 un petit avertissement au d\u00e9but de l’\u00e9mission.
\nJe vous laisse donc d\u00e9couvrir ou red\u00e9couvrir la d\u00e9mo pour ceux qui ne l’auraient jamais vu. Elle dure 12 minutes : quand j’ai annonc\u00e9 \u00e7a \u00e0 Seb (directeur de Nolife), il a eu peur, mais une fois que la d\u00e9mo se lance, toutes les craintes s’envolent. On est bien en pr\u00e9sence d’une d\u00e9mo moderne, que ce soit au niveau du rythme, de la r\u00e9alisation ou des effets.<\/p>\nPour clore cette note rapide que j’\u00e9cris en retard (d\u00e9sol\u00e9…), au niveau de la captation, les deux seules r\u00e9elles difficult\u00e9es se sont situ\u00e9es au niveau de l’\u00e9mulateur qui a \u00e9t\u00e9 difficile \u00e0 trouver (tous les liens pointaient sur un site indisponible), et au niveau d’une astuce graphique utilis\u00e9e qui permet de doubler le nombre de couleurs perceptibles en utilisant un syst\u00e8me de swap entre deux couleurs adjacente 25 fois par seconde. Malheureusement ce syst\u00e8me est totalement incompatible avec un transcodage vers une r\u00e9solution entrelac\u00e9es (en l’occurence 50i) : j’ai donc repris la d\u00e9mo \u00e0 chaque fois que c’\u00e9tait le cas et j’ai mix\u00e9 les images adjacentes afin de reconstituer de vraies couleurs \u00e0 partir des couleur \u00ab\u00a0virtuelles\u00a0\u00bb. Le rendu est donc plus fluide et il n’y a plus de scintillement, mais \u00e9videmment il est diff\u00e9rent de ce que l’on peut voir sur la vraie machine.<\/p>\n
\u00c0 la semaine prochaine pour le dernier Temps R\u00e9el de la saison, qui (normalement) fera partie d’une soir\u00e9e sp\u00e9ciale !<\/p>\n","protected":false},"excerpt":{"rendered":"
Ce soir dans Temps R\u00e9el sur Nolife, encore une fois il n’y aura qu’une seule d\u00e9mo, et quelle d\u00e9mo ! Numen, de taQuart. Numen sur pouet.net J’avoue que je ne connaissais pas cette d\u00e9mo avant que Doug de l’association MO5 ne m’en touche deux mots il y a quelques jours. Je ne le remercierais jamais …<\/p>\n
Temps R\u00e9el n\u00b05<\/span> Lire la suite\u00a0\u00bb<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rop_custom_images_group":[],"rop_custom_messages_group":[],"rop_publish_now":"initial","rop_publish_now_accounts":[],"rop_publish_now_history":[],"rop_publish_now_status":"pending","site-sidebar-layout":"default","site-content-layout":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","footnotes":""},"categories":[2,3],"tags":[],"class_list":["post-206","post","type-post","status-publish","format-standard","hentry","category-nerditude","category-nolife"],"yoast_head":"\nTemps R\u00e9el n\u00b05 - Coredump<\/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.fenarinarsa.com\/?p=206\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Temps R\u00e9el n\u00b05 - Coredump\" \/>\n<meta property=\"og:description\" content=\"Ce soir dans Temps R\u00e9el sur Nolife, encore une fois il n’y aura qu’une seule d\u00e9mo, et quelle d\u00e9mo ! 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![](\"\/blog\/nolife\/tempsreel_numen.jpg\")
<\/p>\n