{"id":891771,"date":"2011-05-05T22:56:00","date_gmt":"2011-05-05T22:56:00","guid":{"rendered":"http:\/\/sindikat.bloguje.sk\/891771-pmd-a-farbicky-ii.php"},"modified":"2016-02-08T23:49:40","modified_gmt":"2016-02-08T22:49:40","slug":"891771-pmd-a-farbicky-ii-php","status":"publish","type":"post","link":"https:\/\/sindik.at\/?p=891771","title":{"rendered":"PMD a farbi\u010dky II."},"content":{"rendered":"

Ned\u00e1vno tu Ub880d zverejnil \u010dl\u00e1nok o roz\u0161\u00edren\u00ed mo\u017enosti zobrazenia farieb na PMD. Dnes by som r\u00e1d pridal zop\u00e1r postrehov z dvoch verzi\u00ed realiz\u00e1cie tohto roz\u0161\u00edrenia.<\/p>\n

<\/p>\n

V prvom rade som sa zameral na zn\u00ed\u017eenie po\u010dtu p\u00fazdier, ktor\u00e9 som navy\u0161e umiestnil na univerz\u00e1lnu dosku pre SMD IO<\/a>. U\u0161etr\u00ed sa t\u00fdm jedno p\u00fazdro TTL, ale pribudne tranzistor vo funkcii invertora pre sign\u00e1l R6 pred MUXom. Verziu som nazval ColorAce_B a jej sch\u00e9ma je nasledovn\u00e1:<\/p>\n

\"colorace_b\"<\/a><\/p>\n

Letm\u00fd n\u00e1vrh dosky by mohol vyzera\u0165 takto (jednostrann\u00e1 doska s nieko\u013ek\u00fdmi prepojkami):<\/p>\n

\"\"<\/strong><\/p>\n

\u010ealej som zistil, \u017ee netreba osadi\u0165 emitorov\u00fd sledova\u010d na synchroniza\u010dn\u00fd sign\u00e1l. Sta\u010d\u00ed vytiahnu\u0165 p\u00f4vodn\u00fd a doladi\u0165 potenciometer 2k2 (vi\u010f strana 17.jpg servisnej pr\u00edru\u010dky PMD<\/a>). Oblas\u0165 doladenia je pomerne \u0161irok\u00e1 (cca. 3\/4 dr\u00e1hy potenciometra a tak by nemal by\u0165 probl\u00e9m, ak budete prev\u00e1dzkova\u0165 zapojenie aj na TV r\u00f4znych parametrov.<\/p>\n

V\u00fdstupy RGB maj\u00fa \u00farovne TTL, preto odpor\u00fa\u010dam pou\u017ei\u0165 podobn\u00e9 zapojenie ako pre ZX Spectrum 128k – 150R do s\u00e9rie z v\u00fdstupu emitorov\u00e9ho sledova\u010da smerom na SCART TV (pod\u013ea tohto dokumentu<\/a>, strana 9).<\/p>\n

Snaha o zjednodu\u0161enie zapojenia bola zav\u0155\u0161en\u00e1 n\u00e1vrhom GALu, ktor\u00fd nahradil v\u0161etk\u00fdch 5 resp. 4 TTL IO. Z p\u00f4vodn\u00e9ho ColorAce zost\u00e1vaj\u00fa zapojen\u00e9 iba v\u00fdstupn\u00e9 emitorov\u00e9 sledova\u010de buden\u00e9 v\u00fdstupmi GALu – R, G a B. Kolektory tranzistorov sa pripoja priamo na +5V. Samozrejme \u010das\u0165 pridan\u00fdch 2ks pam\u00e4t\u00ed 4164 zost\u00e1va bezo zmeny.<\/p>\n

Rovnice s\u00fa pomerne jednoduch\u00e9, aj ke\u010f ich doladenie nejak\u00fd \u010das zabralo a podarilo sa to hlavne v\u010faka v\u00fdraznej pomoci autora p\u00f4vodn\u00e9ho zapojenia:<\/p>\n

CHIP cace_gal gal16V8<\/span><\/pre>\n
CLK A6I EN \/F1 \/F2 MOD ZAT VIDEO AMUX GND<\/span>\r\nNC DI6 DI7 DO6 DO7 B G R A6O VCC<\/span><\/pre>\n
EQUATIONS<\/span><\/pre>\n
G = \/F1\u00a0 * \/F2\u00a0 * MOD * ZAT<\/span>\r\n+ \/DO6 * \/DO7 * MOD * ZAT<\/span><\/pre>\n
B = F2\u00a0 * MOD * ZAT<\/span>\r\n+ DO7 * MOD * ZAT<\/span><\/pre>\n
R = F1\u00a0 * MOD * ZAT<\/span>\r\n+ DO6 * MOD * ZAT<\/span><\/pre>\n
A6O =\u00a0 A6I * \/EN<\/span>\r\n+ \/A6I *\u00a0 VIDEO *\u00a0 AMUX * EN<\/span>\r\n+\u00a0 A6I * \/VIDEO *\u00a0 AMUX * EN<\/span>\r\n+\u00a0 A6I *\u00a0 VIDEO * \/AMUX * EN<\/span>\r\n+\u00a0 A6I * \/VIDEO * \/AMUX * EN<\/span><\/pre>\n
DO6 := DI6<\/span>\r\nDO6.c = CLK<\/span><\/pre>\n
DO7 := DI7<\/span>
\nDO7.c = CLK<\/span><\/p>\n
 <\/p>\n
Sign\u00e1ly DO6 a DO7 s\u00fa pou\u017eit\u00e9 len vn\u00fatri GALu a preto ich netreba nikam externe prip\u00e1ja\u0165 (s\u00fa jednoducho NC). GAL tie\u017e nepotrebuje pripojenie sign\u00e1lu R6. Ten je – pod\u013ea o\u010dak\u00e1van\u00ed – zhodn\u00fd s A6′ v pr\u00edpade, \u017ee VIDEO a AMUX s\u00fa log.1 (ako p\u00edsal UB v predch\u00e1dzaj\u00facom \u010dl\u00e1nku).<\/p>\n
Priradenie sign\u00e1lov pinom GALu 16V8 je nasledovn\u00e9:<\/p>\n
      ._____\u00a0\u00a0\u00a0 _____.<\/span>\r\n      |\u00a0\u00a0\u00a0\u00a0 \\__\/\u00a0\u00a0\u00a0\u00a0 |<\/span>\r\n  CLK |\u00a0 1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 20 | VCC<\/span>\r\n  A6I |\u00a0 2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 19 | A6O<\/span>\r\n   EN |\u00a0 3\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 18 | R<\/span>\r\n  \/F1 |\u00a0 4\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 17 | G<\/span>\r\n  \/F2 |\u00a0 5\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 16 | B<\/span>\r\n  MOD |\u00a0 6\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 15 | DO7<\/span>\r\n  ZAT |\u00a0 7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 14 | DO6<\/span>\r\nVIDEO |\u00a0 8\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 13 | DI7<\/span>\r\n AMUX |\u00a0 9\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12 | DI6<\/span>\r\n  GND | 10\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 11 | NC<\/span>\r\n      |______________|\r\n\r\n<\/span><\/pre>\n\n\n\n\n\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
 
Pre z\u00e1ujemcov o realiz\u00e1ciu prid\u00e1m e\u0161te zoznam vhodn\u00fdch miest odkia\u013e vytiahnu\u0165 jednotliv\u00e9 sign\u00e1ly z dosky PMD85-2A.<\/td>\n<\/tr>\n
PMD85-2A<\/td>\nSchema<\/td>\nColorAce_B<\/td>\nColorAce_GAL<\/td>\nPozn.<\/td>\n<\/tr>\n
Puzdro<\/td>\nPin<\/td>\nSignal<\/td>\nPuzdro<\/td>\nPin<\/td>\nPin<\/td>\nAlt.meno<\/td>\n<\/td>\n<\/tr>\n
7405(V19)<\/td>\n11<\/td>\nZAT<\/td>\n7400(IC2)<\/td>\n2<\/td>\n7<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
7403(V32)<\/td>\n1,2<\/td>\nMOD<\/td>\n7400(IC2)<\/td>\n1<\/td>\n6<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
74164(V14)<\/td>\n13<\/td>\nAMUX<\/td>\n7400(IC2)<\/td>\n13<\/td>\n9<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
7410(V18)<\/td>\n3,4,5<\/td>\nVIDEO<\/td>\n7400(IC2)<\/td>\n12<\/td>\n8<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
4164-D6′<\/td>\n14<\/td>\nD6<\/td>\n7474(IC1)<\/td>\n2<\/td>\n12<\/td>\nDI6<\/td>\n<\/td>\n<\/tr>\n
7474(V31)<\/td>\n3,11<\/td>\nSTB<\/td>\n7474(IC1)<\/td>\n3,11<\/td>\n1<\/td>\nCLK<\/td>\n<\/td>\n<\/tr>\n
4164-D7′<\/td>\n14<\/td>\nD7<\/td>\n7474(IC1)<\/td>\n12<\/td>\n13<\/td>\nDI7<\/td>\n<\/td>\n<\/tr>\n
7474(V31)<\/td>\n6<\/td>\n\/F1<\/td>\n7400(IC2)<\/td>\n9<\/td>\n4<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
7474(V31)<\/td>\n8<\/td>\n\/F2<\/td>\n7400(IC3)<\/td>\n2<\/td>\n5<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
7493(V23)<\/td>\n11<\/td>\nR6<\/td>\nR6->Q4<\/td>\nB<\/td>\n<\/td>\nN\/A<\/td>\n<\/td>\n<\/tr>\n
74153(V29)<\/td>\n7<\/td>\nA6′<\/td>\n74157(IC4)<\/td>\n3<\/td>\n2<\/td>\nA6I<\/td>\n<\/td>\n<\/tr>\n
4164-D6′,D7′<\/td>\n13<\/td>\nA6″<\/td>\n74157(IC4)<\/td>\n4<\/td>\n19<\/td>\nA6O<\/td>\n<\/td>\n<\/tr>\n
DIN5-F<\/td>\n5<\/td>\nR-TTL<\/td>\n7400(IC2)<\/td>\n8<\/td>\n18<\/td>\nR<\/td>\n\\\\ pripoj<\/td>\n<\/tr>\n
DIN5-F<\/td>\n3<\/td>\nG-TTL<\/td>\n7400(IC3)<\/td>\n6<\/td>\n17<\/td>\nG<\/td>\n| cez<\/td>\n<\/tr>\n
DIN5-F<\/td>\n4<\/td>\nB-TTL<\/td>\n7400(IC3)<\/td>\n11<\/td>\n16<\/td>\nB<\/td>\n\/sledovac<\/td>\n<\/tr>\n
7400(V33)<\/td>\n7<\/td>\nGND<\/td>\n7400(IC2)<\/td>\n7<\/td>\n10<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
7400(V33)<\/td>\n14<\/td>\n+5V<\/td>\n7400(IC2)<\/td>\n14<\/td>\n20<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n11,14,15<\/td>\nNC<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
 <\/p>\n
Fotky z prototypovania GALu:<\/p>\n
\"\"<\/p>\n
\"\"<\/p>\n
S\u00fabory na stiahnutie s\u00fa k dispoz\u00edcii tu:<\/p>\n