K inov\u00e1cii mikropo\u010d\u00edta\u010da PMD 1 85-1 prist\u00fapili v\u00fdrobcovia nielen v snahe inovova\u0165 v\u00fdrobky, ale aj pre vylep\u0161enie funk\u010dn\u00fdch vlastnosti po\u010d\u00edta\u010da i vyrie\u0161enie probl\u00e9mov so zabezpe\u010dovan\u00edm tla\u010didiel. Nov\u00e9 tla\u010didl\u00e1 vyu\u017e\u00edvaj\u00fa vodiv\u00fd elastom\u00e9r. Maj\u00fa jemnej\u0161\u00ed chod, v\u00e4\u010d\u0161iu spo\u013eahlivos\u0165 a ve\u013ek\u00fa \u017eivotnos\u0165. Tla\u010didl\u00e1 \u00faspe\u0161ne pre\u0161li sk\u00fa\u0161kami \u017eivotnosti so 4,5 mili\u00f3nmi zopnut\u00ed. Ergonomickej\u0161\u00ed tvar hmatn\u00edku zlep\u0161uje manipul\u00e1ciu s kl\u00e1vesnicou.
Softverov\u00e9 \u00fapravy mali roz\u0161\u00edri\u0165 existuj\u00face mo\u017enosti mikropo\u010d\u00edta\u010da a zjednodu\u0161i\u0165 obsluhu, doplni\u0165 aj znaky malej abecedy a nieko\u013eko dal\u0161\u00edch znakov – vlnovka, \u0161tvor\u010dek a pod., zr\u00fdchli\u0165 v\u00fdkon grafick\u00fdch funkci\u00ed, spresni\u0165 v\u00fdpo\u010det goniometrick\u00fdch funkci\u00ed a\u017e na 6 desatinn\u00fdch miest, a to v stup\u0148och alebo radianoch, plynul\u00fd v\u00fdpis pam\u00e4ti s mo\u017enos\u0165ou zastavenia, mo\u017enos\u0165 jednoduchej ochrany programov proti ich prezeraniu a kop\u00edrovaniu i mnoho d’al\u0161\u00edch \u00faprav.
Roz\u0161\u00edrenie aplika\u010dn\u00fdch mo\u017enost\u00ed mikropo\u010d\u00edta\u010da umo\u017enilo i doplnenie opera\u010dn\u00e9ho syst\u00e9mu o modul ,,termin\u00e1l“, ktor\u00fd umo\u017e\u0148uje pou\u017ei\u0165 mikropo\u010d\u00edta\u010d ako termin\u00e1l k nadriaden\u00e9mu po\u010d\u00edta\u010du radu SMEP.
Nedostatkom predch\u00e1dzaj\u00faceho typu bola i skuto\u010dnos\u0165, \u017ee sn\u00edmanie \u00fadajov z magnetof\u00f3novej p\u00e1sky bolo treba robi\u0165 na rovnakom type magnetof\u00f3nu ak\u00fd sa pou\u017eil na z\u00e1znam. Tento probl\u00e9m sa prejavil e\u0161te v\u00fdraznej\u0161ie, ke\u010f odpor\u00fa\u010dan\u00fd typ magnetof\u00f3nu K 10 prestali vyr\u00e1ba\u0165. V inovovanom type je sign\u00e1l softverovo analyzovan\u00fd, \u010do umo\u017enilo f\u00e1zovo nez\u00e1visl\u00e9 sn\u00edmanie nahr\u00e1vok; z\u00e1znam a sn\u00edmanie d\u00e1t nez\u00e1visi na type magnetof\u00f3nu. V\u0161etky tieto \u00fapravy zvy\u0161uj\u00face \u00fa\u017eitkov\u00fa hodnotu, zlep\u0161uj\u00face parametre a vlastnosti osobn\u00e9ho mikropo\u010d\u00edta\u010da sa v\u0161ak neodrazili v cene, ktor\u00e1 zostala p\u00f4vodn\u00e1.
Upravy p\u00e9emd\u00e9\u010dka ocenia predov\u0161etk\u00fdm tvorcovia programov a t\u00ed, ktor\u00ed akt\u00edvne pracuj\u00fa s po\u010d\u00edta\u010dom napriek tomu, \u017ee niektor\u00e9 \u00fapravy museli uskuto\u010dni\u0165 i za cenu nie \u00faplnej kompatibility s verziou PMD 85-1.<\/p>\n\n\n\n
V tejto s\u00favislosti sa objavilo ve\u013ea ot\u00e1zok, \u010di mo\u017eno upravi\u0165 mikropo\u010d\u00edta\u010d PMD 85-1 na PMD 85-2. Na t\u00fato ot\u00e1zku mo\u017eno odpoveda\u0165 kladne. \u00daprava nebude probl\u00e9mom pre tie kolektivy, ktor\u00e9 sa aspo\u0148 trocha zaoberaj\u00fa elektronikou, resp. v\u00fdpo\u010dtovou technikou, napr\u00edklad v elektrotechnick\u00fdch kr\u00fa\u017ekoch, SZM a pod., ako i pre \u0161ikovn\u00fdch jednotlivcov, preto\u017ee \u00faprava si nevy\u017eaduje \u017eiadne mimoriadne technick\u00e9 prostriedky a nekladie ani mimoriadne n\u00e1roky na zru\u010dnos\u0165. Rozdiely medzi oboma mikropo\u010d\u00edta\u010dmi s\u00fa v doske kl\u00e1vesnice, vrchnom kryte skrinky, v \u00faprave dosky interfejsu, programe ,,monitor“ a programe BASIC-G. Nov\u00e1 kl\u00e1vesnica je s p\u00f4vodnou plne kompatibiln\u00e1 a ak o\u017eeliete pohodlnej\u0161iu pr\u00e1cu s \u0148ou, m\u00e4k\u0161\u00ed chod tla\u010didiel a men\u0161iu \u017eivotnos\u0165 vypl\u00fdvaj\u00facu z pou\u017eitia star\u0161ieho typu tla\u010didiel, m\u00f4\u017eete pou\u017ei\u0165 aj v upravenom \u201ep\u00e9emd\u00e9\u010dku“ p\u00f4vodn\u00fa kl\u00e1vesnicu. Vyhotovenie novej kl\u00e1vesnice je trochu n\u00e1ro\u010dnej\u0161ie. Vy\u017eaduje okrem nov\u00fdch tla\u010didiel s vodiv\u00fdm elastom\u00e9rom i nov\u00fd n\u00e1vrh plo\u0161nej dosky (i ke\u010f elektrick\u00e9 zapojenie je takmer zhodn\u00e9 s p\u00f4vodn\u00fdm). Kontaktn\u00e9 plochy jednotliv\u00fdch tla\u010didiel s\u00fa vytvoren\u00e9 priamo na doske plo\u0161n\u00fdch spojov a maj\u00fa povrchov\u00fa \u00fapravu – s\u00fa pozl\u00e1ten\u00e9 (kv\u00f4li zv\u00fd\u0161eniu spo\u013eahlivosti spoja). Na dosku kl\u00e1vesnice pribudli obvody, ktor\u00e9 zabezpe\u010duj\u00fa akustick\u00fa signaliz\u00e1ciu zopnutia tla\u010didla, preto\u017ee nov\u00e9 tla\u010didl\u00e1 maj\u00fa m\u00e4kk\u00fd a tich\u00fd chod a nevyd\u00e1vaj\u00fa charakteristick\u00e9 puknutie“ ako predch\u00e1dzaj\u00face typy tla\u010didiel. Na osobnom mikropo\u010d\u00edta\u010di PMD 85-2 t\u00fato \u010das\u0165 v\u0161ak neosadzuj\u00fa s\u00fa\u010diastkami, preto\u017ee akustick\u00e1 signaliz\u00e1cia je rie\u0161en\u00e1 softverovo s mo\u017enos\u0165ou vypnutia. Pre t\u00fdch, ktor\u00ed by si chceli vymeni\u0165 v p\u00f4vodnej verzii iba kl\u00e1vesnicu (bez zmeny monitora a Basicu) je na obr. 1 uveden\u00e9 hardverov\u00e9 rie\u0161enie akustickej signaliz\u00e1cie.<\/p>\n\n\n\n Pou\u017eitie novej kl\u00e1vesnice si vy\u017eaduje \u00fapavu vrchn\u00e9ho krytu skrinky, preto\u017ee plocha, ktor\u00fa zaberaj\u00fa tla\u010didl\u00e1, je pri kl\u00e1vesnici v\u00e4\u010d\u0161ia. Uprava spo\u010d\u00edva vo zv\u00e4\u010d\u0161en\u00ed v\u00fdrezu pre pole tla\u010didiel na vrchnej \u010dasti skrinky. Rozmery v\u00fdr\u0119zu s\u00fa na obr. 2. \u00dapravy dosky interfejsu sa dot\u00fdkaj\u00fa kan\u00e1la \u010d. 1 ur\u010den\u00e9ho pre s\u00e9riov\u00fd styk. Z\u00e1kladn\u00fdm prvkom s\u00e9riov\u00e9ho styku je obvod USART (MHB 8251), ku ktor\u00e9mu s\u00fa pripojen\u00e9 dva samostatn\u00e9 bloky. Jeden blok tvor\u00ed interfejs pre pripojenie kazetov\u00e9ho magnetof\u00f3nu a druh\u00fd je ur\u010den\u00fd pre pripojenie perif\u00e9rnych zariaden\u00ed so s\u00e9riov\u00fdm I\/O. Oba bloky sa na mikropo\u010d\u00edta\u010di PMD 85-1 prep\u00ednaj\u00fa prep\u00edna\u010dom umiestnen\u00fdm na zadnej \u010dasti skrinky medzi oboma konektormi (magnetof\u00f3nov\u00fd vstup – s\u00e9riov\u00fd vstup). V novom zapojen\u00ed sa vstupn\u00fd sign\u00e1l z magnetof\u00f3nu po \u00faprave v obvodoch MAA 748 a A 301D u\u017e priamo priv\u00e1dza na vstup DSR (vstup ud\u00e1vaj\u00faci pripravenos\u0165 prenosov\u00e9ho zariadenia) obvodu USART MHB 8251. Netreba teda \u010fal\u0161ie \u00fapravy obvodmi UCY 74 121 a UCY 7486, ako v p\u00f4vodnom zapojen\u00ed. \u010ealej mo\u017eno, ale nie je to potrebn\u00e9, vybra\u0165 obvody IO 13 (9500), IO 14 (74 121) a IO 20 (7474). Opera\u010dn\u00fd syst\u00e9m (Monitor) osobn\u00e9ho mikropo\u010d\u00edta\u010da PMD 85-1 je ulo\u017een\u00fd v EPROM pam\u00e4tiach, ktor\u00e9 s\u00fa na doske CPU. Programovac\u00ed jazyk BASIC-G je umiestnen\u00fd vo vymenite\u013enej ROM kazete. Verzia BASIC-G V2.0 m\u00e1 rovnak\u00fd rozsah ako jeho predch\u00e1dzaj\u00faca verzia BASIC-G V1.0 a predstavuje 9 obvodov EPROM pam\u00e4t\u00ed typu MHB 8708 (resp. K 573 RF 1) s celkovou kapacitou 9 KB. Pre ,,prestavbu“ mikropo\u010d\u00edta\u010da PMD 85-1 na PMD 85-2 treba v\u0161etk\u00fdch 9 ks pam\u00e4ti preprogramova\u0165, resp. Vymeni\u0165.<\/p>\n\n\n\n Ing. IVAN NI\u017d\u0147AN V dne\u0161nom historickom okienku si zaspom\u00edname ak\u00fdm sp\u00f4sobom sa v on\u00fdch dob\u00e1ch rie\u0161ili upgrejdy po\u010d\u00edta\u010dov.<\/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-930494","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\/p5aqy8-3U3Y","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/sindik.at\/index.php?rest_route=\/wp\/v2\/posts\/930494","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=930494"}],"version-history":[{"count":3,"href":"https:\/\/sindik.at\/index.php?rest_route=\/wp\/v2\/posts\/930494\/revisions"}],"predecessor-version":[{"id":930507,"href":"https:\/\/sindik.at\/index.php?rest_route=\/wp\/v2\/posts\/930494\/revisions\/930507"}],"wp:attachment":[{"href":"https:\/\/sindik.at\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=930494"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sindik.at\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=930494"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sindik.at\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=930494"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
<\/p>\n\n\n\n![\"\"](\"https:\/\/sindik.at\/wp-content\/uploads\/2019\/02\/PMD85_1_Upgrade_Obr1.jpg\")
KL\u00c1VESNICA<\/strong><\/h2>\n\n\n\n
<\/p>\n\n\n\n![\"\"](\"https:\/\/sindik.at\/wp-content\/uploads\/2019\/02\/PMD85_1_Upgrade_Obr2-1024x404.jpg\")
<\/figcaption><\/figure>\n\n\n\n![\"\"](\"https:\/\/sindik.at\/wp-content\/uploads\/2019\/02\/PMD85_1_Upgrade_Obr3-1024x785.jpg\")
<\/figcaption><\/figure>\n\n\n\nVRCHN\u00dd KRYT SKRINKY<\/h2>\n\n\n\n
<\/p>\n\n\n\nDOSKA INTERFEJSU
<\/h2>\n\n\n\n
Z\u00e1sadn\u00fd rozdiel oproti predch\u00e1dzaj\u00facemu zapojeniu je v rie\u0161en\u00ed interfejsu pre kazetov\u00fd magnetof\u00f3n. Zapojenie je zjednodu\u0161en\u00e9 a umo\u017e\u0148uje volbu ,,lubovo\u013enej“ r\u00fdchlosti z\u00e1znamu a sn\u00edmania na kazetovom magnetof\u00f3ne.
Vzorkovac\u00ed kmito\u010det 1200 Hz (r\u00fdchlos\u0165 prenosu) pre obvod USART je u PMD 85-1 generovan\u00fd napevno v obvode MHB 9 500 (IO 13). V pr\u00edpade inej frekvencie prenosu bolo treba robi\u0165 hardverov\u00fd z\u00e1sah na interfejsovej doske. Z\u00e1sah bol v zapojen\u00ed pr\u00edvodu (body C-B) vzorkovacej frekvencie z obvodu MHB 9 500 a pripojen\u00edm vzorkovacej frekvencie pre USART z obvodu \u010dasova\u010da 8 253. Na upravenej interfejsovej doske je na hodinov\u00e9 vstupy (TxC, RxC) obvodu 8 253, priveden\u00e1 vzorkovacia frekvencia priamo z \u010dasova\u010da a netreba robi\u0165 prepojovanie prepojkou (netreba ani obvod MHB 9 500).
Vzorkovacia frekvencia je po zapnut\u00ed mikropo\u010d\u00edta\u010da automaticky nastaven\u00e1 na 1 200 Hz. Zmenu frekvencie mo\u017eno robi\u0165 programovo jednoduch\u00fdm pr\u00edkazom A POKE ‚C1 FE, ‚K alebo A POKE ‚C1 FE, L. kde K je vzorkovacia frekvencia vyjadren\u00e1 v decim\u00e1lnej hodnote. \u00dadaj C1FE predstavuje adresu pam\u00e4\u0165ov\u00e9ho miesta z\u00e1pisn\u00edka opera\u010dn\u00e9ho syst\u00e9mu, na ktor\u00fa sa vklad\u00e1 hodnota vzorkovacej frekvencie. Uv\u00e1dzame hodnoty L a K pre niektor\u00e9 funkcie:
<\/p>\n\n\n\nfrekvencia BD K Hexa L Deci
300 1AAC 6828
900 08E4 2276
1200 06AB 1707
2400 0355 854
3600 0239 569 <\/strong>
<\/pre>\n\n\n\n
V zapojen\u00ed \u010dasti obvodov realizuj\u00facich prenos nedo\u0161lo k \u017eiadnym funk\u010dn\u00fdm zmen\u00e1m. Obe, len m\u00e1lo odli\u0161n\u00e9 zapojenia, s\u00fa plne kompatibiln\u00e9.
\u010cas\u0165 zapojenia interfejsu, kde sa robia \u00fapravy PMD 85-1 na PMD 85-2 je na obr. 3. Upravu mo\u017eno urobi\u0165 takto: <\/p>\n\n\n\n
Pop\u00edsan\u00fa \u00fapravu v\u0161ak podmie\u0148uje zmena opera\u010dn\u00e9ho syst\u00e9mu tak, ako o tom bude re\u010d v nasleduj\u00facej \u010dasti.
<\/p>\n\n\n\nPROGRAM MONITOR<\/h2>\n\n\n\n
Monitor m\u00e1 rozsah 4KB a tvoria ho 4 ks 10 typu MHB 8708 (resp. K 573 RF1). Pri mikropo\u010d\u00edta\u010di PMD 85-2 je rozsah monitoru zachovan\u00fd. Samotn\u00e9 EPROM pam\u00e4te v\u0161ak obsahuj\u00fa nov\u00fd program. U\u017e pop\u00edsan\u00e1 \u00faprava interfejsu vy\u017eaduje preprogramovanie resp. v\u00fdmenu 4 ks EPROM pam\u00e4t\u00ed typu MHB 8708 (K 573 RF 1).
<\/p>\n\n\n\nPROGRAM BASIC-G<\/h2>\n\n\n\n
Ing. TIBOR GULI\u0160
Elektr\u00f3n 10 \/ 1987, strana 59-61
<\/p>\n\n\n\n![\"\"](\"https:\/\/sindik.at\/wp-content\/uploads\/2019\/02\/PMD85_1_Upgrade1-1-747x1024.jpg\")
<\/figure>\n\n\n\n![\"\"](\"https:\/\/sindik.at\/wp-content\/uploads\/2019\/02\/PMD85_1_Upgrade2-1-694x1024.jpg\")
<\/figure>\n\n\n\n![\"\"](\"https:\/\/sindik.at\/wp-content\/uploads\/2019\/02\/PMD85_1_Upgrade3-1-619x1024.jpg\")
<\/figure>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"