kompiuteris periferiuli mowyobilobebi
kompiuteris periferiuli mowyobilobebi
kompiuteris periferiuli mowyobilobebi
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FM meTodTan SedarebiT 3-jer, xolo MFM meTodTan<br />
SedarebiT 1,5-jer meti informaciis ganTavsebis sa-<br />
Sualebas iZleva vinCesterze. RLL meTodis mixedviT<br />
ara calkeuli bitebi, aramed bitebis jgufebi kodirdeba,<br />
ris Sedegadac niSnis cvlilebis zonebis<br />
garkveuli Tanmimdevrobebi iqmneba.<br />
RLL meTodi IBM-is mier iqna damuSavebuli da<br />
Tavdapirvelad did manqanebSi gamoiyeneboda. 1980-ian<br />
wlebSi am meTodis gamoyeneba vinCesterebSi daiwyes,<br />
xolo amJamad faqtiurad yvela damgrovebelSi gamoiyeneba,<br />
drekadi diskebis garda.<br />
RLL kodireba or ZiriTad parametrs efuZneba:<br />
gadasvlebis armqone zonebis minimalur (garbenis<br />
sigrZe) da maqsimalur (garbenis zRvari) raodenobas.<br />
am parametrebis cvlilebiT SesaZlebelia kodirebis<br />
sxvadasxva meTodebis miReba. praqtikulad RLL 2,7<br />
(garbenis minimaluri sigrZe _ 2, garbenis zRvari _<br />
7) meTodi gamoiyeneba.<br />
FM da MFM meTodebi RLL meTodis konkretuli<br />
variantebia (Sesabamisad RLL 0,1da RLL 1,3), Tumca am<br />
meTodebs ufro Cveuli, FM da MFM terminebiT aRweren.<br />
RLL meTodis iSviaTad gamoyenebuli variantia<br />
RLL 3,9. zogjer mas gaumjobesebul RLL-sac (Advanced<br />
RLL - ARLL) uwodeben. RLL 3,9 meTodis gamoyenebiT<br />
mniSvnelovnad izrdeba diskze informaciis Caweris<br />
simWidrove, magram mcirdeba saimedooba. iyo mcdeloba<br />
ARLL kontrolerebis vinCesterebSi gamoyenebi-<br />
53<br />
sa, magram maTi gamoSveba SemdgomSi dabali saimedobis<br />
gamo Sewyda.<br />
kodirebis erTi da imave sistemisTvis SesaZlebelia<br />
aTasobiT sxvadasxva variantis arCeva.<br />
cxrilSi 2.2 warmodgenilia RLL 2,7 kodirebis erTerTi<br />
farTod gavrcelebuli varianti. monacemebis 2,<br />
3 da 4-bitiani jgufebi Sesabamisad 4, 6 da 8-bitur<br />
ujredebad gardaiqmneba. kodirebis meTodi niSnis<br />
cvlilebis velebs Soris araumcires 2 da araumetes<br />
7 gadasvlisgareSe ujredis (garbenis) arsebobas uzrunvelyofs.<br />
cxrili 2.2<br />
RLL 2,7 kodireba<br />
monacemebis bitebi niSnis Secvlis zonebis<br />
Tanmimdevroba<br />
10 NTNN<br />
11 TNNN<br />
000 NNNTNN<br />
010 TNNTNN<br />
011 NNTNNN<br />
0010 NNTNNTNN<br />
0011 NNNNTNNN<br />
nax. 2.8-ze warmodgenilia vinCesterze `X~ simbolos<br />
(ASCII kodi _ 01011000) Cawerisas formirebuli<br />
signalebis diagrama kodirebis sxvadasxva<br />
sistemebisTvis.<br />
54
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