{"id":931673,"date":"2025-08-18T01:14:26","date_gmt":"2025-08-18T00:14:26","guid":{"rendered":"https:\/\/sindik.at\/?p=931673"},"modified":"2025-08-18T01:14:26","modified_gmt":"2025-08-18T00:14:26","slug":"posilnovaci-modul-pre-cpu-z80a","status":"publish","type":"post","link":"https:\/\/sindik.at\/?p=931673","title":{"rendered":"Posil\u0148ovac\u00ed modul pre CPU Z80A"},"content":{"rendered":"\n

Tak ako som sa na konci m\u00f4jho posledn\u00e9ho \u010dl\u00e1nku<\/a> zmienil o posil\u0148ovacom module pre CPU, tak som aj spravil. Tento modul prv\u00fdkr\u00e1t uvidel svetlo sveta u\u017e v janu\u00e1ri 2025 a teda v \u010dase zverejnenia toho \u010dl\u00e1nku u\u017e bol hotov\u00fd, no nap\u00edsa\u0165 o \u0148om nebol \u010das. Medzit\u00fdm som u\u017e z neho spravil e\u0161te dve verzie, pri\u010dom druh\u00e1 verzia bol funk\u010dn\u00fd nepodarok. Teraz som si kone\u010dne na\u0161iel \u010das v\u00e1m o \u0148om nap\u00edsa\u0165.<\/p>\n\n\n\n\n\n\n\n

\"Z80A<\/p>\n\n\n\n

Tak ako som v predch\u00e1dzaj\u00facich \u010dl\u00e1nkoch spom\u00ednal probl\u00e9my s nestabilnos\u0165ou prestavieb ako u Didaktiku M, tak aj pri Didaktiku Kompakt na 128kB, tak skuto\u010dne i\u0161lo o pre\u0165a\u017eovanie zbernice procesora a tento posil\u0148ova\u010d na 90% tieto probl\u00e9my odstra\u0148uje. Nako\u013eko som skoro v\u0161etky procesory nak\u00fapil cez Aliexpress, tak je pre m\u0148a tento modul doslova z\u00e1chranou a mo\u017en\u00e9 probl\u00e9my sa presun\u00fa na obvody 74244 a 74245. S t\u00fdmto sa sp\u00e1ja aj oneskorenie sign\u00e1lov a preto v pr\u00edpade probl\u00e9mov je vhodn\u00e9 skontrolova\u0165 CAS a RAS na osciloskope a pr\u00edpadne ich zladi\u0165.<\/p>\n\n\n\n

\"Z80A<\/a><\/figure>\n\n\n\n

Na tejto fotke vy\u0161\u0161ie je vidie\u0165 v2.00 ktor\u00e1 je s\u00edce funk\u010dn\u00e1, ale pri n\u00e1vrhu som zabudol tri prepoje a teda som ich vyrie\u0161il premosten\u00edm. \u010eal\u0161\u00ed probl\u00e9m tejto verzie je, \u017ee sa nezmest\u00ed do Didaktiku M, ak je v \u0148om roz\u0161\u00edrenie na 128kB so stereo Melodikom, rovnako ako aj v1.00 na fotke \u00faplne hore, \u010do bolo p\u00f4vodn\u00fdm cie\u013eom tejto SMD verzie.<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

Ako ste si mo\u017eno v\u0161imli, tak v1.00 bola kompletne THT a bola vhodn\u00e1 iba pre Didaktik Kompakt, nako\u013eko sa do Didaktiku M s roz\u0161\u00edren\u00edm na 128kB u\u017e nezmest\u00ed. To mala vyrie\u0161i\u0165 v2.00, ale procesor som umiestnil ve\u013emi bl\u00edzko kl\u00e1vesnice a teda sa nezmestila pod kl\u00e1vesnicu.<\/p>\n\n\n\n

Tak\u017ee verzia 3.00 je pre m\u0148a posledn\u00e1. Tento zosil\u0148ova\u010d ale nemus\u00ed rie\u0161i\u0165 v\u0161etky va\u0161e probl\u00e9my so zbernicou, nako\u013eko sign\u00e1ly \/NMI, \/WAIT, \/BUSRQ, \/INT, \/CLK, \/BUSAK,\u00a0\/HALT a \/RESET v\u00f4bec neposil\u0148uje. Napriek tomu to \u00faplne posta\u010d\u00ed. Ja som svojimi pokusmi pri\u0161iel na to, \u017ee najlep\u0161ie sa mi spr\u00e1vaj\u00fa obvody 74HCT a\u00a0dokonca maj\u00fa aj ni\u017e\u0161iu spotrebu. Preto v\u00e1m ich vrelo odpor\u00fa\u010dam. Po ich pou\u017eit\u00ed v\u00a0Didaktiku M s\u00a0roz\u0161\u00edren\u00edm na 128kB a\u00a0vstavan\u00fdm stereo Melodikom, sa v\u0161etky probl\u00e9my s\u00a0pou\u017eit\u00edm DivIDE vyrie\u0161ili a\u00a0teda Mko zostalo stabiln\u00e9 cel\u00fdch 48h testovania, teda nonstop zapnut\u00fd a\u00a0dokola demo a\u00a0na koniec po resetoch znova na\u010d\u00edtanie in\u00e9ho dema alebo aj hry. Jednoducho u\u017e pri pr\u00e1ci s\u00a0DivIDE ani po zahriat\u00ed nevykazuje \u017eiadnu chybu. A\u00a0rovnako to pomohlo aj Kompaktu, kde som s\u00edce musel znova zladi\u0165 RAS a\u00a0CAS, no nebolo to u\u017e ni\u010d hrozn\u00e9, nako\u013eko roz\u0161iruj\u00faca doska u\u017e laden\u00edm po\u010d\u00edtala…<\/p>\n\n\n\n

Viac detailov ako to pracuje v\u00e1m prezrad\u00ed samotn\u00e1 sch\u00e9ma a\u00a0pri poh\u013eade na \u0148u je jasn\u00e9, \u017ee posil\u0148ova\u010d v\u00f4bec nie je zlo\u017eit\u00fd.<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

Na koniec neviem, \u010do viac v\u00e1m m\u00e1m k tomu nap\u00edsa\u0165, no pre z\u00e1ujemcov tentokr\u00e1t sem d\u00e1vam aj zdrojov\u00e9 s\u00fabory (gerbery) pre pr\u00edpadn\u00fa v\u00fdrobu v1.00 (THT) aj v3.00 (SMD). Na fotke ni\u017e\u0161ie vid\u00edte v3.00, poh\u013ead v Didaktiku M s kl\u00e1vesnicou (sed\u00ed len tak tak).<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n
Z80A_CPU_active_repeater_THT_v1.00<\/a><\/div>\n\n\n\n
Z80A_CPU_active_repeater_SMD_v3.00<\/a><\/div>\n\n\n\n
Z80A_CPU_active_repeater_schema<\/a><\/div>
\n\n\n\n

Ak ste sa do\u010d\u00edtali a\u017e sem, tak v\u00e1s tento \u010dl\u00e1nok ur\u010dite zaujal a ja v\u00e1m \u010fakujem za pozornos\u0165 a prajem ve\u013ea radosti s va\u0161\u00edm 8-bitom.
<\/p>\n\n\n\n

Autor: Breki_j, Nitra<\/strong><\/p>\n\n\n\n

Kontaktova\u0165 ma m\u00f4\u017eete na:
– Telegrame<\/a>\u2028
– Oldcomp.cz<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Tak ako som sa na konci m\u00f4jho posledn\u00e9ho \u010dl\u00e1nku zmienil o posil\u0148ovacom module pre CPU, tak som aj spravil. Tento modul prv\u00fdkr\u00e1t uvidel svetlo sveta u\u017e v janu\u00e1ri 2025 a teda v \u010dase zverejnenia toho \u010dl\u00e1nku u\u017e bol hotov\u00fd, no nap\u00edsa\u0165 … Pokra\u010dova\u0165 v \u010d\u00edtan\u00ed →<\/span><\/a><\/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":true,"_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,"enabled":false},"version":2}},"categories":[5],"tags":[],"class_list":["post-931673","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\/p5aqy8-3UmZ","jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/sindik.at\/index.php?rest_route=\/wp\/v2\/posts\/931673","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=931673"}],"version-history":[{"count":12,"href":"https:\/\/sindik.at\/index.php?rest_route=\/wp\/v2\/posts\/931673\/revisions"}],"predecessor-version":[{"id":931691,"href":"https:\/\/sindik.at\/index.php?rest_route=\/wp\/v2\/posts\/931673\/revisions\/931691"}],"wp:attachment":[{"href":"https:\/\/sindik.at\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=931673"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sindik.at\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=931673"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sindik.at\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=931673"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}