![\"\"](\"https:\/\/sindik.at\/wp-content\/uploads\/2021\/05\/sdk_msx_2.jpg\")
<\/a>Mojim ultim\u00e1tnym cie\u013eom je na v\u0161etk\u00fdch ma\u0161in\u00e1ch, ktor\u00e9 mi tu pristan\u00fa, rozbehn\u00fa\u0165 legend\u00e1rneho Manic Minera. Hlavn\u00fdm zdrojom in\u0161pir\u00e1cie bol \u00fakaz zhliadnut\u00fd v Centre pre po\u010d\u00edta\u010dov\u00fa hist\u00f3riu (http:\/\/www.computinghistory.org.uk\/<\/a>) v anglickom Cambridge, kde som po\u010das mojej n\u00e1v\u0161tevy pred dvomi rokmi videl kompletn\u00e9 \u201cmanicoradie\u201d. Na v\u00e4\u010d\u0161ine zapnut\u00fdch po\u010d\u00edta\u010dov, r\u00f4znych zna\u010diek a kraj\u00edn p\u00f4vodu, usporiadan\u00fdch na jednej rade stolov za sebou be\u017eal – h\u00e1dajte \u010do? No samozrejme Manic Miner. Ako na potvoru neviem n\u00e1js\u0165 t\u00fa spr\u00e1vnu fotku, lebo v priebehu roka som tam bol dvakr\u00e1t, ale mysl\u00edm, \u017ee to bola t\u00e1to rada po\u010d\u00edta\u010dov.<\/p>\n\n\n\n V r\u00e1mci jedn\u00e9ho z minul\u00fdch virtu\u00e1lnych Retrobit<\/a> stretnut\u00ed mi Otis pripravil audio s\u00fabor (s \u010d\u00edm in\u00fdm ako Manic Minerom :), ktor\u00fd som bol schopn\u00fd vyp\u00edska\u0165 do Sanyo MPC-100. Aby som sa v\u0161ak \u010falej nemusel babra\u0165 s p\u00e1skami, pr\u00edpadne ich n\u00e1hradami a zd\u013ahav\u00fdm p\u00edskan\u00edm s\u00faborov do MSX, zadov\u00e1\u017eil som si hne\u010f tri u\u017eito\u010dn\u00e9 perif\u00e9rie: <\/p>\n\n\n\n Ani jedna z nich si v\u0161ak nerozumela s obmedzenou RAM v Casio MX-10<\/a>. Za\u010dal som teda h\u013eada\u0165 ako sa sa s t\u00fdm popasovali na slovo vzat\u00ed MSX experti a vylovil odkaz na f\u00f3re na roz\u0161\u00edrenie RAM<\/a> predchodcu MX-10 s n\u00e1zvom PV-16. Autorovi tohto zapojenia Rafaelovi \u201cB@ss\u201d Lopesovi sa podarilo v syst\u00e9me n\u00e1js\u0165 na hradlovom poli<\/a> sign\u00e1l pre v\u00fdber slotu 2, ktor\u00fd pripojil na v\u00fdberov\u00fd vstup pridan\u00e9ho 64k RAM \u010dipu, \u010d\u00edm spr\u00edstupnil cel\u00fa RAM v samostatnom 64k slote. Pam\u00e4\u0165ov\u00e9 \u010dipy tohto typu – v \u00fazkom puzdre s ozna\u010den\u00edm napr\u00edklad 24512, 61512 ap. – sa preva\u017ene osadzovali ako ke\u0161 pre PC dosky rady 386DX – 486.<\/p>\n\n\n\n Rafael na \u00fapravu ve\u013emi fili\u0161t\u00ednsky vyhol nohy pam\u00e4ti na plocho \u010d\u00edm spravil ak\u00fasi obdobu SMD. N\u00e1sledne vyu\u017eil priestor pod p\u00f4vodnou ROM, kde mohol v\u00e4\u010d\u0161inu kontaktov jednoducho prepoji\u0165 s p\u00f4vodn\u00fdmi spojmi a\u017e na p\u00e1r v\u00fdvodov, ktor\u00e9 bolo treba spoji\u0165 dr\u00f4tov\u00fdmi prepojkami s CPU resp. PLD. E\u0161te podotknem, \u017ee obvod je treba prilo\u017ei\u0165 k doske n\u00e1pisom dolu.<\/p>\n\n\n\n \u010co (japonsk\u00fd) \u010dert nechcel, m\u00e1 MX-10 narozdiel od svojho predchodcu osaden\u00e9 \u00faplne in\u00e9 hradlov\u00e9 pole<\/a> a rovnako aj jeho nasledovn\u00edk MX-101<\/a>. Zvy\u010dajne to u\u017e tak b\u00fdva, \u017ee priekopn\u00edcka cesta b\u00fdva t\u0155nist\u00e1, tak\u017ee som si musel pekne prep\u00edska\u0165 cel\u00fd syst\u00e9m, aby som sa dopracoval k tomu, \u017ee HG61H06R02F v 80 v\u00fdvodovom puzdre jednoducho sign\u00e1l Slot select 2 vyveden\u00fd nem\u00e1. Je na \u0148om pomerne dos\u0165 nezapojen\u00fdch v\u00fdvodov, ale tie maj\u00fa aj pod\u013ea dokument\u00e1cie<\/a> zosta\u0165 \u201cvo vzduchu\u201d. V\u0161etky ostatn\u00e9 s\u00fa vyu\u017eit\u00e9 a cesty na doske plo\u0161n\u00fdch spojov od nich niekam v syst\u00e9me smeruj\u00fa. Ne\u00fapln\u00fd reverzn\u00fd diagram vyzer\u00e1 nasledovne:<\/p>\n\n\n\n Rafael mi n\u00e1sledne tie\u017e potvrdil \u00faspech v pr\u00edpade zabudovania jeho \u00fapravy do modelu MX-101, kde je na nov\u0161ej verzii hradlov\u00e9ho po\u013ea<\/a>, tentokr\u00e1t aj s integrovan\u00fdm PSG – AY-3-8910, op\u00e4\u0165 dostupn\u00fd aj sign\u00e1l v\u00fdberu pre druh\u00fd slot.<\/p>\n\n\n\n Ak to v MX-10 teda nep\u00f4jde po dobrom (rozumej jedin\u00fdm pridan\u00fdm vodi\u010dom na v\u00fdber RAM) povedal som si, \u017ee to mus\u00ed \u00eds\u0165 nejako po zlom (rozumej pridan\u00edm nejak\u00e9ho zapojenia navy\u0161e – ide\u00e1lne s jedn\u00fdm integrovan\u00fdm obvodom v DIL puzdre pre \u013eahk\u00e9 osadenie na univerz\u00e1lnu DPS). N\u00e1sledn\u00fd v\u00fdskum som zameral na perif\u00e9riu, opraden\u00fa r\u00fa\u0161kom tajomstva resp. nezrovnalos\u0165ami v popise jej funkci\u00ed – dokovacie stanice KB-7 a KB-10. V dokument\u00e1cii sa vraj p\u00ed\u0161e o roz\u0161\u00edrenej 16k RAM, ktor\u00e1 sa \u00fadajne mapuje len pri pou\u017eit\u00ed so syst\u00e9mom s 8KB RAM (PV-7<\/a>?).<\/p>\n\n\n\n Na MSX f\u00f3re bola tie\u017e zmienka o mapovan\u00ed pr\u00eddavnej RAM do nevyu\u017eit\u00e9ho priestoru Slotu 0, kde je namapovan\u00e1 syst\u00e9mov\u00e1 ROM na adres\u00e1ch 0000h – 7FFFh a tie\u017e syst\u00e9mov\u00e1 RAM bu\u010f od C000h – FFFFh pri 16k alebo E000h – FFFh pri 8k.<\/p>\n\n\n\n Pr\u00eddavn\u00fa RAM som pripojil rovnako, ako pri vy\u0161\u0161ie spom\u00ednanej \u00faprave PV-16 vr\u00e1tane adresn\u00fdch vodi\u010dov A14 a A15 napriamo od CPU a pok\u00fasil sa dosta\u0165 mapovanie aspo\u0148 \u010dasti pam\u00e4te do priestoru 8000h – BFFFh. Prv\u00fd pokus kde som vyrobil v\u00fdberov\u00fd obvod zo 74LS00 a skombinoval \/SLTSL=1 (zabudovan\u00fd roz\u0161iruj\u00faci slot neakt\u00edvny), A15=1 a A14=0 s BASICom nabehol a namiesto `12431 Bytes free` vyp\u00edsal `28815 Bytes free`, tak\u017ee som dostal potvrdenie, \u017ee sa uber\u00e1m spr\u00e1vnym smerom. \u017dia\u013e SD mapper ani floppy radi\u010d st\u00e1le neboli schopn\u00e9 nahra\u0165 \u017eiadny zmyslupln\u00fd program tak, aby sa syst\u00e9m nezr\u00fatil.<\/p>\n\n\n\n Fin\u00e1lne som vo v\u00fdberovom obvode vymenil 74LS00 za 74LS138 s nasledovn\u00fdm zapojen\u00edm:<\/p>\n\n\n\n \u010cip som umiestnil na odrezok univerz\u00e1lnej dosky, je prilepen\u00fd svojou vrchnou stranou na p\u00f4vodn\u00fa dosku pomocou obojstrannej penovej lepiacej p\u00e1sky a zo spodnej strany s\u00fa v\u00fdvody na\u0165ahan\u00e9 na po\u017eadovan\u00e9 sign\u00e1ly.<\/p>\n\n\n\n Napriek tomu, \u017ee RAM test sa tv\u00e1ri, \u017ee vid\u00ed cel\u00fdch 64k v Slote 1.3, nemysl\u00edm si, \u017ee by to bolo mo\u017en\u00e9:<\/p>\n\n\n\n Vyu\u017eite\u013enej RAM m\u00e1m pod\u013ea m\u0148a s\u00edce len 32k napriek tomu, \u017ee v syst\u00e9me je teraz osaden\u00fdch spolu 96k RAM, pri zapo\u010d\u00edtan\u00ed 16k Video RAM, ale Manic Miner mi u\u017e teraz veselo vyhr\u00e1va bez rozdielu \u010di je nahran\u00fd z SD karty, (emulovanej) floppy mechaniky alebo ROM modulu. Misia splnen\u00e1!<\/p>\n\n\n\n Ak by v\u00e1s napadlo nejak\u00e9 elegantn\u00e9 rie\u0161enie ako pristr\u00e1nkova\u0165 zvy\u0161ok pr\u00eddavnej RAM, pros\u00edm pridajte ho do koment\u00e1ra.<\/p>\n\n\n\n Pr\u00edjemn\u00e9 MSXovanie a v\u0161etk\u00fdm Z80 dlh\u00fd \u017eivot bez v\u00edrusov. Dobr\u00e1 rada: neka\u0161lite na ne, aby nie\u010do nenachytali, V ostatnom \u010dase som pod\u013eahol \u010daru po\u010d\u00edta\u010dov radu MSX, ktor\u00e9 som dlh\u00e9 roky akosi prehliadal.<\/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-930902","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\/p5aqy8-3Uay","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/sindik.at\/index.php?rest_route=\/wp\/v2\/posts\/930902","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=930902"}],"version-history":[{"count":3,"href":"https:\/\/sindik.at\/index.php?rest_route=\/wp\/v2\/posts\/930902\/revisions"}],"predecessor-version":[{"id":930921,"href":"https:\/\/sindik.at\/index.php?rest_route=\/wp\/v2\/posts\/930902\/revisions\/930921"}],"wp:attachment":[{"href":"https:\/\/sindik.at\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=930902"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sindik.at\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=930902"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sindik.at\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=930902"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}<\/a><\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/a><\/figure>\n\n\n\n<\/a><\/a><\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n
\/ikon<\/p>\n","protected":false},"excerpt":{"rendered":"