{"id":930156,"date":"2018-01-03T22:58:55","date_gmt":"2018-01-03T21:58:55","guid":{"rendered":"http:\/\/sindik.at\/?p=930156"},"modified":"2018-01-19T10:35:29","modified_gmt":"2018-01-19T09:35:29","slug":"oprava-pp01-ii","status":"publish","type":"post","link":"https:\/\/sindik.at\/?p=930156","title":{"rendered":"Oprava PP01 II."},"content":{"rendered":"

Na sklonku predch\u00e1dzaj\u00faceho roka (rozumej minul\u00fd v\u00edkend) som sa podujal o\u017eivi\u0165 posledne z\u00edskan\u00e9 PP01.<\/p>\n

<\/p>\n

V z\u00e1piskoch z decembrov\u00e9ho stretnutia som u\u017e op\u00edsal ako som sa k po\u010d\u00edta\u010du dostal. Je s\u00edce mechanicky nekompletn\u00fd – ch\u00fdba mu vrchn\u00fd plast a aj ochrann\u00fd kryt, ktor\u00fd z neho rob\u00ed \u201ccestovn\u00fd kufr\u00edk\u201d, ale elektricky a elektronicky mu na\u0161\u0165astie nech\u00fdba ni\u010d.<\/p>\n

Opravu som za\u010dal zvy\u010dajn\u00fdm odstr\u00e1nen\u00edm n\u00e1nosov prachu a in\u00e9ho svinstva zo zdroja, v\u0161etk\u00fdch dosiek s plo\u0161n\u00fdmi spojmi a kl\u00e1vesnice.<\/p>\n

Prebehla optick\u00e1 kontrola stavu dosiek, ke\u010f som sa sna\u017eil identifikova\u0165 pr\u00edpadne zhoren\u00e9 komponenty. Ni\u010d tak\u00e9 som na\u0161\u0165astie neodhalil, tak\u017ee som sa odhodlal zapn\u00fa\u0165 sie\u0165ov\u00fd vyp\u00edna\u010d na zdroji a zisti\u0165 \u017eivotaschopnos\u0165 syst\u00e9mu. V indika\u010dnom poli (INT) na\u013eavo od kl\u00e1vesnice sa rozsvietili 2 LED v hornom rade (\u00faplne v\u013eavo a vpravo) a na obrazovke sa objavili zvisl\u00e9 pruhy biele striedavo prel\u00ednan\u00e9 bledomodr\u00fdmi a \u017elt\u00fdmi. Pri Spektre by som to tipoval na vadn\u00fa videoram alebo m\u0155tvy meni\u010d \u010do ide v\u00e4\u010d\u0161inou ruka v ruke. Nasledovalo teda zmeranie v\u00fdstupn\u00fdch nap\u00e4t\u00ed zdroja. V\u0161etky vyzerali zdravo +5, -5 , +12 aj -12V, dokonca ani na okrajoch dosiek neboli v\u00fdrazn\u00e9 \u00fabytky na jednotliv\u00fdch vetv\u00e1ch. \u010co ma milo prekvapilo, ke\u010f uv\u00e1\u017eim ak\u00fd probl\u00e9m s t\u00fdmto m\u00e1vaj\u00fa v\u0161etky Didaktiky Gama pri\u010dom plocha ich dosky je mo\u017eno osmina oproti ploche \u0161tyroch dosiek p\u00e9p\u00e9\u010dka. Tu m\u00f4\u017eem in\u017einierov zo ZVT<\/span> z V\u00daVT jednozna\u010dne pochv\u00e1li\u0165.<\/p>\n

N\u00e1sledne som sa vrhol na testovanie jednotliv\u00fdch podsyst\u00e9mov. Op\u00e4\u0165 sa uk\u00e1zalo, \u017ee ma\u0165 ved\u013ea m\u0155tvej ma\u0161iny jednu \u017eiv\u00fa je na nezaplatenie hlavne z h\u013eadiska z\u00edskan\u00e9ho \u010dasu. K podobn\u00e9mu zisteniu pri\u0161li aj Martin s Pavlom <\/a>u\u017e takmer pred piatimi rokmi.<\/p>\n

Takto som mal mo\u017enos\u0165 otestova\u0165 dosku RAM (SM3105 RWM), modul ROM (SM2251) a kl\u00e1vesnicu (SM2257) z ne\u017eiv\u00e9ho PP01 v tom \u017eivom. A uk\u00e1zalo sa, \u017ee v\u0161etky tri funguj\u00fa bez probl\u00e9mov, z \u010doho vyplynulo, \u017ee chyba je na hlavnej doske CPU (SM3103) ne\u017eiv\u00e9ho PP.<\/p>\n

Nastal \u010das na teplotn\u00fd test. Ma\u0161ina u\u017e be\u017eala zhruba 5 min\u00fat, tak\u017ee by mala by\u0165 zohriata na pracovn\u00fa teplotu. Obehol som teda bru\u0161kom ukazov\u00e1ka v\u0161etky \u0161v\u00e1by so \u0161irok\u00fdm \u201crozchodom\u201d 2* 8255, 8251, 8253 a nakoniec aj CPU – 8080. Pr\u00e1ve ten sa zdal by\u0165 naj\u017eeravej\u0161\u00ed a potvrdil to aj ru\u010dn\u00fd infrateplomer, ktor\u00fd uk\u00e1zal nie\u010do tesne nad 70 stup\u0148ov Celzia, \u010do je pod\u013ea Tesla katal\u00f3gu <\/a>z roku 1986 nad pr\u00edpustnou pracovnou teplotou. Op\u00e4tovne som premeral nap\u00e4tia na CPU a boli \u00faplne v norme. To ma presved\u010dilo, \u017ee je na\u010dase na\u0161tartova\u0165 osciloskop a za\u010da\u0165 sa venova\u0165 sign\u00e1lom. Intu\u00edcia nesklamala a hne\u010f druh\u00fd meran\u00fd pin odhalil probl\u00e9m. Za\u010dal som samozrejme od taktovania CPU. MHB8080 m\u00e1 \u010dasovacie vstupy rovno dva. Sign\u00e1l PHI1 (22) mal kr\u00e1sny obd\u013a\u017enikov\u00fd priebeh, ale na PHI2 (15) bolo \u00fapln\u00e9 ticho.<\/p>\n

Na tomto mieste sa mus\u00edm ve\u013emi pekne po\u010fakova\u0165 EC1045 za jeho str\u00e1nku o PP01<\/a>, ktor\u00e1 mi bola nesmierne n\u00e1pomocn\u00e1. EC si dal t\u00fa n\u00e1mahu, \u017ee \u00a0p\u00f4vodne ru\u010dne kreslen\u00e9 a skenovan\u00e9 sch\u00e9my preklopil do Eaglu a hlavne pridal osadzov\u00e1ky dosiek, ktor\u00e9 boli absol\u00fatne nevyhnutn\u00e9 na \u00faspech tejto misie. Dosk\u00e1m v PP ch\u00fdba maska a keby som mal ru\u010dne trasova\u0165 cesti\u010dky ur\u010dite by som to zabalil, lebo by som nevydr\u017eal s nervami.<\/p>\n

S materi\u00e1lmi, ktor\u00e9 som mal pred sebou som \u013eahko na\u0161iel poz\u00edcie IO na doske a bol to op\u00e4\u0165 druh\u00fd \u0161v\u00e1b v porad\u00ed, ktor\u00fd robil \u0161arapatu – IC65 (74S74). Na jeho vstupoch CLK (3) a CLR (1) sa uk\u00e1zali kr\u00e1sne priebehy, ale v\u00fdstupy Q (5) a \/Q (6) boli ticho. F\u00faka\u010dkou som vybral p\u00f4vodn\u00fd \u0161v\u00e1b a zaletoval som p\u00e4ticu DIL14. Po chv\u00ed\u013eke h\u013eadania som vyhrabal zo z\u00e1sob 7474 vo verzii LS a osadil ju do p\u00e4tice. Nasledovalo zapnutie a na v\u00fdstupoch IC65 (5 a 6) a aj na vstupe (9) IC22D a v\u00fdstupe (8) sa objavil vidite\u013en\u00fd priebeh. Tie\u017e nastala zmena v obrazci na TV. Zvisl\u00e9 \u010diary sa zmenili na farebn\u00e9 kocky a CPU sa po chv\u00ed\u013eke op\u00e4\u0165 zohrialo na 70 stup\u0148ov.Us\u00fadil som, \u017ee to m\u00e1 u\u017e za sebou a odpor\u00fa\u010dalo sa naveky do krem\u00edkov\u00e9ho neba. Vymenil som ho,<\/p>\n

A tak sa za\u010dal pre jedno z m\u00e1la dnes e\u0161te existuj\u00facich PP01 nov\u00fd \u017eivot. D\u00fafam, \u017ee dlh\u00fd a plodn\u00fd:<\/p>\n

GBASIC V5.8\r\n\r\nREADY\r\n<\/pre>\n
\/ikon<\/p>\n","protected":false},"excerpt":{"rendered":"
Na sklonku predch\u00e1dzaj\u00faceho roka (rozumej minul\u00fd v\u00edkend) som sa podujal o\u017eivi\u0165 posledne z\u00edskan\u00e9 PP01.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[5],"tags":[],"class_list":["post-930156","post","type-post","status-publish","format-standard","hentry","category-tema-2-hardware-php"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p5aqy8-3TYw","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/sindik.at\/index.php?rest_route=\/wp\/v2\/posts\/930156","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sindik.at\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sindik.at\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sindik.at\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sindik.at\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=930156"}],"version-history":[{"count":3,"href":"https:\/\/sindik.at\/index.php?rest_route=\/wp\/v2\/posts\/930156\/revisions"}],"predecessor-version":[{"id":930164,"href":"https:\/\/sindik.at\/index.php?rest_route=\/wp\/v2\/posts\/930156\/revisions\/930164"}],"wp:attachment":[{"href":"https:\/\/sindik.at\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=930156"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sindik.at\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=930156"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sindik.at\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=930156"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}