...justrighttrin0tlin0titap0 tfs20tlang1033tlangfe1033tcgridtlangnp1033tlangfen
p1033 Itbtfs36tinsrsid16128011 Adrese de porturi din PC-uritpar Stpard tqj tli0tri0tidctlpartaspalphataspnumtfaautotadjustrig
httrin0tlin0titap0 Itfs26tinsrsid16128011 tpar SItbtfs24tinsrsid16128011 Legenda SItfs24tinsrsid16128011 Adresele sunt valabile pt. PC, AT tf0i 386-PC.tpar ttab SItbtfs24tinsrsid16128011 SItfs24tinsrsid16128011 temdash valabil numai pentru AT tf0i 386-PCtpar ttab SItbtfs24tinsrsid16128011 R SItfs24tinsrsid16128011 temdash numai teen citiretpar ttab SItbtfs24tinsrsid16128011 SItfs24tinsrsid16128011 temdash numai teen scrieretpar ttab SItbtfs24tinsrsid16128011 RSItfs24tinsrsid16128011 temdash teen citire tf0i scriere.tpar tpar SItbtfs28tinsrsid16128011 ttab 000 - 01F Controller DMA cu 4 canale 8237 ila slavestpar SItfs24tinsrsid16128011 tpar 000ttab Rttab Reg. de adrestf7ttab canal 0tpar 001ttab Rttab Reg. contorttab canal 0tpar 002ttab Rttab Reg. de adrestf7ttab canal 1tpar 003ttab Rttab Reg. contorttab canal 1tpar 004ttab Rttab Reg. de adrestf7ttab canal 2tpar 005ttab Rttab Reg. contorttab canal 2tpar 006ttab Rttab Reg. de adrestf7ttab canal 3tpar 007ttab Rttab Reg. contorttab canal 3tpar tpar SItbtfs24tinsrsid16128011 ObsSItfs24tinsrsid16128011 Operatfeii cu adresele de mai sus se efectueaztf7 obligatoriu prin transfer consecutiv, teentte2i bitfeii 0-7, apoi bitfeii 8-15.tpar tpar SItbtfs24tinsrsid16128011 008 Reg. de comandtf7 8237SItfs24tinsrsid16128011 tpar tpar Bit ttab 0 ttab 0 tendash invalidaretpar ttab ttab 1 tendash validare transfer mem. - mem.tpar ttab 1 ttab 0 tendash nu se memoreaztf7tpar ttab ttab 1 tendash se memoreaztf7 adresa canal 0tpar ttab 2 ttab 0 tendash validaretpar ttab ttab 1 tendash invalidare controller DMAtpar ttab 3 ttab 0 tendash utilizare timing normaltpar ttab ttab 1 tendash utilizare timing comprimattpar ttab 4 ttab 0 tendash prioritate fixattf7tpar ttab ttab 1 tendash prioritate rotativtf7tpar ttab 5 ttab 0 tendash alegerea scrierii normaletpar ttab ttab 1 tendash alegerea scrierii extinsetpar ttab 6 ttab tendash starea semnalului DREQtpar ttab 7 ttab tendash starea semnalului DACKtpar tpar SItbtfs24tinsrsid16128011 R Reg. de sttf7ri 8237SItfs24tinsrsid16128011 tpar tpar ttab 0 ttab 1 tendash canalul 0 a atins TC contor nultpar ttab 1 ttab 1 tendash canalul 1 a atins TCtpar ttab 2 ttab 1 tendash canalul 2 a atins TCtpar ttab 3 ttab 1 tendash canalul 3 a atins TCtpar ttab 4 ttab 1 tendash cerere pt. canal 0tpar ttab 5 ttab 1 tendash cerere pt. canal 1tpar ttab 6 ttab 1 tendash cerere pt. canal 2tpar ttab 7 ttab 1 tendash cerere pt. canal 3tpar tpar SItbtfs24tinsrsid16128011 009 Reg. de cerere de canal 8237SItfs24tinsrsid16128011 tpar tpar Bit ttab 0 1tpar ttab 0 0ttab tendash selectare canal 0tpar ttab 1 0ttab tendash selectare canal 1tpar ttab 0 1ttab tendash selectare canal 2tpar ttab 1 1ttab tendash selectare canal 3tpar ttab 2 ttab 0 tendash tf0tergeretpar ttab ttab 1 tendash punere bit de mascare canaltpar ttab 3,4,5,6,7 tendash neutilizatfeitpar tpar SItbtfs24tinsrsid16128011 00A Reg. de mascare canalSItfs24tinsrsid16128011 tpar tpar Bit ttab 0 1tpar ttab 0 0ttab tendash selectare canal 0 pt. mascaretpar ttab 1 0ttab tendash selectare canal 1 pt. mascaretpar ttab 0 1ttab tendash selectare canal 2 pt. mascaretpar ttab 1 1ttab tendash selectare canal 3 pt. mascaretpar ttab 2 ttab 0 tendash stergeretpar ttab ttab 1 tendash punere bit de mascare canaltpar ttab 3,4,5,6,7 tendash neutilizatfeitpar tpar SItbtfs24tinsrsid16128011 00B Reg. de mod 8237SItfs24tinsrsid16128011 tpar tpar Bit ttab 0 1tpar ttab 0 0ttab tendash utilizare bit de comandtf7 canal 0tpar ttab 1 0ttab tendash utilizare bit de comandtf7 canal 1tpar ttab 0 1ttab tendash utilizare bit de comandtf7 canal 2tpar ttab 1 1ttab tendash utilizare bit de comandtf7 canal 3tpar ttab 2 3tpar ttab 0 0ttab tendash verificaretpar ttab 1 0ttab tendash scriere memorietpar ttab 0 1ttab tendash citire memorietpar ttab 1 1ttab tendash neutilizattpar ttab 4 ttab 0 tendash invalidaretpar ttab ttab 1 tendash validare autoinitfeializaretpar ttab 5 ttab 0 tendash incrementaretpar ttab ttab 1 tendash decrementare adresa de memorietpar ttab 6 7tpar ttab 0 0ttab tendash selectare mod cereretpar ttab 1 0ttab tendash selectare mod octettpar ttab 0 1ttab tendash selectare mod bloctpar ttab 1 1ttab tendash selectare mod cascadtf7tpar tpar SItbtfs24tinsrsid16128011 00F Reg. de mtf7tf0ti 8237SItfs24tinsrsid16128011 tpar tpar Bit ttab 0 ttab 0 tendash tf0terge bit mascare canal 0tpar ttab ttab 1 tendash pune bit mascare canal 0tpar ttab 1 ttab 0 tendash tf0terge bit mascare canal 1tpar ttab ttab 1 tendash pune bit mascare canal 1tpar ttab 2 ttab 0 tendash tf0terge bit mascare canal 2tpar ttab ttab 1 tendash pune bit mascare canal 2tpar ttab 3 ttab 0 tendash tf0terge bit mascare canal 3tpar ttab ttab 1 tendash pune bit mascare canal 3tpar ttab 4,5,6,7 tendash neutilizatfeitpar tpar SItbtfs24tinsrsid16128011 010 tendash 01F decodificare redondanttf7 8237tpar tpar SItbtfs28tinsrsid16128011 ttab 020 tendash 03F Controller teentreruperi 8259 iLa masterstpar SItfs24tinsrsid16128011 tpar Canal 0 Tact de la canalul 0 al timerului ceas sistemtpar Canal 1 Cerere de teentrerupere de tastaturtf7tpar Canal 2 Rezervat interfatfea grafictf7 aici se introduc canalele 8tendash 15tpar Canal 3 A doua interfatfetf7 serialtf7tpar Canal 4 Prima interfatfetf7 serialtf7tpar Canal 5 Controller de harddisktpar Canal 6 Controller de floppy disktpar Canal 7 Interfatfea paraleltf7tpar tpar SItbtfs24tinsrsid16128011 ObsSItfs24tinsrsid16128011 Canalul cu numtf7rul cel mai mic are prioritatea cea mai mare.tpar tpar SItbtfs24tinsrsid16128011 020 Reg. de comandtf7 teentreruperiSItfs24tinsrsid16128011 tpar tpar Prin intermediul acestui registru este initfeializat tf0i programat controllertendash ul de teentreruperi. La initfeializare se teenscriu consecutiv 2 pteentf7 la 4 cuvinte de comandtf7 IC teen registru. Pentru a stabili unul din cele 4 moduri posibile de lucru, trebuie stf7 fie teenscrise consecutiv teen registru 3 cuvinte de comandtf7 a operatfeiei OC.tpar tpar SItbtfs24tinsrsid16128011 021SItfs24tinsrsid16128011 SItbtfs24tinsrsid16128011 Reg. de mtf7tf0ti de teentrerupereSItfs24tinsrsid16128011 tpar tpar Bit ttab 0 ttab 0 tendash validaretpar ttab ttab 1 tendash invalidare teentrerupere canal 0tpar ttab 1 tendash 7 tendash idem pt. canalele 1tendash 7tpar tpar SItbtfs24tinsrsid16128011 022 tendash 03F Decodificare redondanttf7 8259tpar tpar SItbtfs28tinsrsid16128011 ttab 040 tendash 05F Timer cu 3 canale 8253 iLa 8254sSItfs24tinsrsid16128011 tpar SItbtfs28tinsrsid16128011 tpar SItfs24tinsrsid16128011 040ttab R Numtf7rtf7tor canal 0 de 16 bitfei tact pt. ceas sistemt...
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