{"id":908,"date":"2019-07-05T16:49:44","date_gmt":"2019-07-05T15:49:44","guid":{"rendered":"https:\/\/www.pmd85.cz\/?page_id=908"},"modified":"2019-07-06T19:23:58","modified_gmt":"2019-07-06T18:23:58","slug":"4-barevne-zobrazeni-na-pmd-85","status":"publish","type":"page","link":"https:\/\/www.pmd85.cz\/?page_id=908","title":{"rendered":"4-barevn\u00e9 zobrazen\u00ed na PMD-85"},"content":{"rendered":"

Tento \u010dl\u00e1nek je dal\u0161\u00edm z \u0159ady t\u011bch, kter\u00e9 popisuj\u00ed \u00fapravu PMD-85 ni\u017e\u0161\u00edch verz\u00ed (1, 2 a 2A) pro \u010dty\u0159barevn\u00fd provoz. Abych se vyhnul pou\u017eit\u00ed kod\u00e9ru v TV norm\u011b PAL, je pou\u017eito propojen\u00ed pomoc\u00ed kabelu SCART a re\u017eimu RGB. Pak sta\u010d\u00ed jen p\u00e1r hradel, viz sch\u00e9ma, a PMD-85 je schopno pro ka\u017edou vodorovnou \u0161estici pixel\u016f zvolit jednu spole\u010dnou barvu inkoustu na \u010dern\u00e9m pozad\u00ed.<\/p>\n

P\u016fvodn\u011b tyto \u010dty\u0159i barvy byly p\u0159edstavov\u00e1ny re\u017eimy: pln\u00fd jas neblik\u00e1 – polovi\u010dn\u00ed jas neblik\u00e1 – pln\u00fd jas blik\u00e1 – polovi\u010dn\u00ed jas blik\u00e1. Existuje n\u011bkolik „pou\u017e\u00edvan\u00fdch“ kombinac\u00ed barev, j\u00e1 jsem zvolil tu s barvami: zelen\u00e1 – \u010derven\u00e1 – modr\u00e1 – fialov\u00e1. Jednak je tento re\u017eim zadefinov\u00e1n a podporov\u00e1n emul\u00e1torem RM-TEAMu, jednak p\u0159\u00edmo geni\u00e1ln\u011b umo\u017e\u0148uje simulaci zb\u00fdvaj\u00edc\u00edch sou\u010dtov\u00fdch barev (tj. \u017elut\u00e9, nebesk\u00e9 a b\u00edl\u00e9) ve v\u011bt\u0161\u00edch ploch\u00e1ch st\u0159\u00edd\u00e1n\u00edm mikro\u0159\u00e1dk\u016f r\u016fzn\u00fdch barev. Ostatn\u011b ColorAce d\u011bl\u00e1 hardwarov\u011b tot\u00e9\u017e, ov\u0161em s podstatn\u011b lep\u0161\u00edm vizu\u00e1ln\u00edm efektem.<\/p>\n

Prototyp pracoval s hradly 74LS21 ale po z\u00e1m\u011bn\u011b za 74HCT21 se viditeln\u011b zv\u00fd\u0161ila ostrost kresby. Hodnota sr\u00e1\u017eec\u00edch odpor\u016f v\u00fdstupn\u00edch nap\u011b\u0165ov\u00fdch d\u011bli\u010d\u016f se nakonec ust\u00e1lila na 270 ohmech. Barvy maj\u00ed ide\u00e1ln\u00ed jas, co\u017e je d\u016fle\u017eit\u00e9 zejm\u00e9na u (tmav\u011b) modr\u00e9. Funk\u010dn\u00ed nap\u011bt\u00ed konektoru SCART na pinu 8 (CTRL) je vedeno p\u0159es ochrann\u00fd odpor 1k a na z\u00e1t\u011b\u017ei poskytuje st\u00e1le je\u0161t\u011b dostate\u010dn\u00e9 nap\u011bt\u00ed 11V. Ovl\u00e1dac\u00ed nap\u011bt\u00ed pinu SCART 16 (RGB ON) p\u0159edpokl\u00e1d\u00e1 jmenovitou z\u00e1t\u011b\u017e 75ohm\u016f a proto je pou\u017eit v\u00fdstup p\u0159es odpor 150ohm. Vznikl\u00fd d\u011bli\u010d z t\u011bchto dvou odpor\u016f pak generuje v\u00fdstupn\u00ed nap\u011bt\u00ed na normou definovanou \u00farove\u0148.<\/p>\n

Pro vyveden\u00ed v\u0161ech pot\u0159ebn\u00fdch sign\u00e1l\u016f je nutn\u00e9 vym\u011bnit DIN konektor na boku po\u010d\u00edta\u010de a osadit nejm\u00e9n\u011b 7-pinovou verzi. Proto\u017ee mezi kovov\u00fdm nosn\u00edkem konektoru a plastov\u00fdm krytem po\u010d\u00edta\u010de nen\u00ed moc m\u00edsta, je nutno konektor DIN7 po v\u00fdm\u011bn\u011b op\u011bt p\u0159in\u00fdtovat, nebo\u0165 na hlavu \u0161roubu u\u017e tam nen\u00ed m\u00edsto. Kabel jsem pou\u017eil origin\u00e1ln\u00ed VGA-VGA, p\u0159i\u010dem\u017e na jednom konci jsem m\u00edsto konektoru CAN15HD osadil konektor SCART a na druh\u00e9m konci pak konektor DIN7. Tento kabel m\u00e1 v\u00fdhodu, \u017ee krom\u011b nest\u00edn\u011bn\u00fdch ovl\u00e1dac\u00edch vodi\u010d\u016f obsahuje podle pou\u017eit\u00e9ho typu nejm\u00e9n\u011b 3 st\u00edn\u011bn\u00e9 p\u00e1ry, kter\u00e9 jsem pou\u017eil pro sign\u00e1ly RGB.<\/p>\n

\"\"<\/a>

Sch\u00e9ma<\/p><\/div>\n

\"\"<\/a>

Vestavba do PMD-85<\/p><\/div>\n

\"\"<\/a>

Foto re\u00e1ln\u00e9 obrazovky<\/p><\/div>\n

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Tento \u010dl\u00e1nek je dal\u0161\u00edm z \u0159ady t\u011bch, kter\u00e9 popisuj\u00ed \u00fapravu PMD-85 ni\u017e\u0161\u00edch verz\u00ed (1, 2 a 2A) pro \u010dty\u0159barevn\u00fd provoz. Abych se vyhnul pou\u017eit\u00ed kod\u00e9ru v TV norm\u011b PAL, je pou\u017eito propojen\u00ed pomoc\u00ed kabelu SCART a re\u017eimu RGB. Pak sta\u010d\u00ed jen p\u00e1r hradel, viz sch\u00e9ma, a PMD-85 je schopno pro ka\u017edou vodorovnou \u0161estici pixel\u016f zvolit […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":292,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/www.pmd85.cz\/index.php?rest_route=\/wp\/v2\/pages\/908"}],"collection":[{"href":"https:\/\/www.pmd85.cz\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.pmd85.cz\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.pmd85.cz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pmd85.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=908"}],"version-history":[{"count":6,"href":"https:\/\/www.pmd85.cz\/index.php?rest_route=\/wp\/v2\/pages\/908\/revisions"}],"predecessor-version":[{"id":923,"href":"https:\/\/www.pmd85.cz\/index.php?rest_route=\/wp\/v2\/pages\/908\/revisions\/923"}],"up":[{"embeddable":true,"href":"https:\/\/www.pmd85.cz\/index.php?rest_route=\/wp\/v2\/pages\/292"}],"wp:attachment":[{"href":"https:\/\/www.pmd85.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=908"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}