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Gevolg: geringe integratiedichtheid Voordeel: eenvoudige aansturing>#  S2Statische RAM IC s (SRAM) 2Statische RAM IC s (SRAM) 2Statische RAM IC s (SRAM) 2Statische RAM IC s (SRAM) 2Statische RAM IC s (SRAM)  2Statische RAM IC s (SRAM) !2Statische RAM IC s (SRAM) " 2Statische RAM IC s (SRAM) # 2Statische RAM IC s (SRAM) $ 2Statische RAM IC s (SRAM) & 2Statische RAM IC s (SRAM) ' 2Statische RAM IC s (SRAM) ) Einde deel 1   *6Deel 2: dynamische RAM IC s .4Dynamische RAM IC s (DRAM)(Per geheugencel een condensator Tamelijk traag: accesstime 60 - 70 ns toepassing: werkgeheugen (simms) Geheugen dissipeert weinig energie. Grote integratiedichtheid mogelijk Nadeel: geheugen IC moeten we refreshen.b0  R /4Dynamische RAM IC s (DRAM)( 04Dynamische RAM IC s (DRAM)( 14Dynamische RAM IC s (DRAM)( 24Dynamische RAM IC s (DRAM)( 34Dynamische RAM IC s (DRAM)( 44Dynamische RAM IC s (DRAM)( 54Dynamische RAM IC s (DRAM)( 74Dynamische RAM IC s (DRAM)( 84Dynamische RAM IC s (DRAM)( 94Dynamische RAM IC s (DRAM)( = 4Dynamische RAM IC s (DRAM)( ?!4Dynamische RAM IC s (DRAM)( @"4Dynamische RAM IC s (DRAM)( C#4Dynamische RAM IC s (DRAM)( D$4Dynamische RAM IC s (DRAM)( E%4Dynamische RAM IC s (DRAM)( I&4Dynamische RAM IC s (DRAM)( J'4Dynamische RAM IC s (DRAM)( K(4Dynamische RAM IC s (DRAM)( + Einde deel 2   ,Deel 3: Het refreshen van DRAMs  ,  O)Het refreshen van DRAMs, Elke geheugencel bestaat uit een condensator Deze heeft een capaciteit van slechts 0,04 pF De condensator moet elke 2 ms worden bijgeladen. 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Ferwerdab 5l  C DA,C:\PLAATJES\print.BMP   ZD31?  @00 7Stoppen  c $A *??[ p, *@0H  0޽h ? f330 p( ' l  C  `p  j  BA? `l  C DA,C:\PLAATJES\print.BMP   `d1?Jj N:Om naar de volgende afbeelding te gaan: druk op spatiebalkH  0޽h ? f33  d*(   dl d C $P    d C <$0  j d BA?0GSl d C DA,C:\PLAATJES\print.BMPH d 0޽h ? f33   %,hL( ,f hr h S DP0    j h BA?0GS h Z1?,  45116|B h TD1?[|B  h TD1?[|B  h TD1?`[`|B  h TD1?[|B  h TD1? [ |B  h TD1?[|B h TD1?[|B h TD1?@[@|B h TD1?[|B h TD1? [  h  `1?[0 A0 h  `d1?p[  A10|B h TD1?, l|B h TD1?`, l`|B h TD1?, l|B h TD1? , l |B h TD1?, l|B h TD1?, l|B h TD1?@, l@|B h TD1?, l|B h TD1?P , lP  h  `ġ1?pb D0  h  `$1?l  D7 !h  `1? :  WE|B "h TD1?f f |B #h TD1? , l  $h  `1?   CS|B &h TD1? L  'h  `D1?p   OE|B (h TD1?p p |B )h TD1?   *h T1?P p` GVoorbeeld: 5116 SRAM ICl ,h C DA,C:\PLAATJES\print.BMPH h 0޽h ? f33  %%l(  lr l S ĤP0    j l BA?0GS| l T1?, |B l TD1?[|B l TD1?[|B l TD1?`[`|B l TD1?[|B  l TD1? [ |B  l TD1?[|B  l TD1?[|B  l TD1?@[@|B  l TD1?[|B l TD1? [  l  `$1?[0 A0 l  `1?p[  A10|B l TD1?, l|B l TD1?`, l`|B l TD1?, l|B l TD1? , l |B l TD1?, l|B l TD1?, l|B l TD1?@, l@|B l TD1?, l|B l TD1?P , lP  l  `1?pb D0 l  `D1?l  D7 l  `1? :  WE|B l TD1?f f |B l TD1? , l  l  `1?   CS|B  l TD1? L  !l  `d1?p   OE|B "l TD1?p p |B #l TD1?   $l T01?P p` T$Vraag: hoe groot is dit geheugen IC?%%l %l C DA,C:\PLAATJES\print.BMPH l 0޽h ? f33  %%pY(  pr p S t 0P0   0 j p BA?0GS| p T1?, |B p TD1?[|B p TD1?[|B p TD1?`[`|B p TD1?[|B  p TD1? [ |B  p TD1?[|B  p TD1?[|B  p TD1?@[@|B  p TD1?[|B p TD1? [  p  ` 01?[0 A0 p  `4!01?p[  A10|B p TD1?, l|B p TD1?`, l`|B p TD1?, l|B p TD1? , l |B p TD1?, l|B p TD1?, l|B p TD1?@, l@|B p TD1?, l|B p TD1?P , lP  p  `!01?pb D0 p  `!01?l  D7 p  `T"01? :  WE|B p TD1?f f |B p TD1? , l  p  `"01?   CS|B  p TD1? L  !p  `#01?p   OE|B "p TD1?p p |B #p TD1?   $p Tt#01?P p` TAntwoord: 11 adreslijnen geeft 211=2048 adressen 8 datalijnen. Dus grootte is 2K x 8&U 3l %p C DA,C:\PLAATJES\print.BMPH p 0޽h ? f33  0''t(( ae<4va tr t S 4$0P0   0 j t BA?0GS| t T1?, |B t TD31?[|B t TD31?[|B t TD31?`[`|B t TD31?[|B  t TD31? [ |B  t TD31?[|B  t TD31?[|B  t TD31?@[@|B  t TD31?[|B t TD31? [  t  `$01?[0 A0 t  `$01?p[  A10|B t TD1?, l|B t TD1?`, l`|B t TD1?, l|B t TD1? , l |B t TD1?, l|B t TD1?, l|B t TD1?@, l@|B t TD1?, l|B t TD1?P , lP  t  `T%01?pb D0 t  `%01?l  D7 t  `&01? :  WE|B t TD1?f f |B t TD1? , l  t  `t&01? '  CS = 0|B  t TD1? L  !t  `&01?p   OE|B "t TD1?p p |B #t TD1?   $t T4'01?P p` e5Aansturen IC: 1e adrescode aanbieden en CS laag maken66v %t N1?v" &t N1?` ` l 't C DA,C:\PLAATJES\print.BMPH t 0޽h ? f33d   P*+x(  xr x S '0P0   0 j x BA?0GS| x T1?, |B x TD31?[|B x TD31?[|B x TD31?`[`|B x TD31?[|B  x TD31? [ |B  x TD31?[|B  x TD31?[|B  x TD31?@[@|B  x TD31?[|B x TD31? [  x  `T(01?[0 A0 x  `(01?p[  A10|B x TD1?, l|B x TD1?`, l`|B x TD1?, l|B x TD1? , l |B x TD1?, l|B x TD1?, l|B x TD1?@, l@|B x TD1?, l|B x TD1?P , lP  x  `)01?pb D0 x  `t)01?l  D7 x  `)01? :  WE|B x TD1?f f |B x TD1? , l  x  `4*01? '  CS = 0|B  x TD1? L  !x  `*01?p   OE|B "x TD1?p p |B #x TD1?   $x T*01?P p` [+2e Het betreffende adres wordt geactiveerd,,v %x N1?v" &x N1?` ` | 'x T1?` p v (x N1?` p | *x T1?@0 0 l +x C DA,C:\PLAATJES\print.BMPH x 0޽h ? f33|  ,$p)+|( $,d |r | S 0P0    j | BA?0GS| | T1?, |B | TD31?[|B | TD31?[|B | TD31?`[`|B | TD31?[|B  | TD31? [ |B  | TD31?[|B  | TD31?[|B  | TD31?@[@|B  | TD31?[|B | TD31? [  |  `D01?[0 A0 |  `01?p[  A10|B | TD1?, l|B | TD1?`, l`|B | TD1?, l|B | TD1? , l |B | TD1?, l|B | TD1?, l|B | TD1?@, l@|B | TD1?, l|B | TD1?P , lP  |  `01?pb D0 |  `d01?l  D7 |  `Ď01? :  WE|B | TD1?f f |B | TD1? , l  |  `$01? '  CS = 0|B  | TD1? L  !|  `01?p   OE|B "| TD1?p p |B #| TD1?  ( $| T01?P p` R3e Als /WE = 0 wordt er een schrijfbewerking uitgevoerd ( /WE is not write enable)SSA| '| T1?` p v (| N1?` p | )| T1?@0 0  *|  `D01? *  30l +| C DA,C:\PLAATJES\print.BMPH | 0޽h ? f33   `X,3( d2P r  S 0P0   0 j  BA?0GS|  T1? |B  TD31?[|B  TD31?[|B  TD31?`[`|B  TD31?[|B  TD31? [ |B  TD31?[|B  TD31?[|B  TD31?@[@|B  TD31?[|B  TD31? [    `d01?[0 A0   `đ01?p[  A10|B  TD1?, |B  TD1?P , lP    `$01?b0 D0   `01?l  D7   `01? :  WE|B  TD1?f f |B  TD1? , l    `D01? '  CS = 0|B  TD1? L  !  `01?p   OE|B " TD1?p p |B # TD1?   $ T01? p  fWRITE bewerking: De processor zet een waarde op de databus die wordt overgenomen in de geheugenlocatiegg| % T1?` p v & N1?` p | ' T1?@0 0  (  `d01? *  30 ) ZĔ01?  LuP|B * TD1?` t`|B + TD1? t|B , TD1?  t |B - TD1? t|B . TD1? t|B / TD1?@ t@|B 0 TD1? t" 1 N1?` @,$D 0 2 N1?` p ,$D0l 3 C DA,C:\PLAATJES\print.BMPH  0޽h ? f33H ! ))( w r  S 0P0   2 j  BA?0GS|  T1?, |B  TD31?[|B  TD31?[|B  TD31?`[`|B  TD31?[|B  TD31? [ |B  TD31?[|B  TD31?[|B  TD31?@[@|B  TD31?[|B  TD31? [    `01?[0 A0   `D01?p[  A10|B  TD1?, l|B  TD1?`, l`|B  TD1?, l|B  TD1? , l |B  TD1?, l|B  TD1?, l|B  TD1?@, l@|B  TD1?, l|B  TD1?P , lP    `01?pb D0   `01?l  D7   `d01? :  WE|B  TD1?f f |B  TD1? , l    `ė01? '  CS = 0|B  TD1? L  !  `$01?p   OE|B " TD1?p p |B # TD1?   $ T01?P p` d43e Als /WE = 1 wordt er een leesbewerking uitgevoerd55| % T1?` p v & N1?` p | ' T1?@0 0  (  `01? *  ?1"3l ) C DA,C:\PLAATJES\print.BMPH  0޽h ? f33 " zr,- (  r  S D0P0   2 j  BA?0GS|  T1? |B  TD31?[|B  TD31?[|B  TD31?`[`|B  TD31?[|B  TD31? [ |B  TD31?[|B  TD31?[|B  TD31?@[@|B  TD31?[|B  TD31? [    `01?[0 A0   `01?p[  A10|B  TD1?, |B  TD1?P , lP    `d01?b0 D0   `01?l  D7   `$01? :  WE|B  TD1?f f |B  TD1? , l    `01? '  CS = 0|B  TD1? L    `01?p   OE|B  TD1?p p |B  TD1?  (  TD01? p  tREAD bewerking: De inhoud van het geactiveerde geheugenadres wordt op de databus gezet en door de processor gelezenuu|  T1?` p v  N1?` p |  T1?@0 0  !  `01? *  ?1"3 " Z01?  LuP|B # TD1?` t`|B $ TD1? t|B % TD1?  t |B & TD1? t|B ' TD1? t|B ( TD1?@ t@|B ) TD1? t + N31?` @,$D  0 , N1?p`,$D0l - C DA,C:\PLAATJES\print.BMPH  0޽h ? f33 # TL0(  j  BA?0GSl + C 0P  2 J -  `$01?r07)  N Samengevat: CS WE 1 X geheugenstand, IC is niet geactiveerd 6O   AN|B . TD1?|B / TD1? @ l 0 C DA,C:\PLAATJES\print.BMPH  0޽h ? f33 $ (  j  BA?0GSr  S 0P  2 ~   `D01?r07  p Samengevat: CS WE 1 X geheugenstand, IC is niet geactiveerd 0 0 schrijfbewerking (write) 6q   c$h|B  TD1?|B  TD1? @ l  C DA,C:\PLAATJES\print.BMPH  0޽h ? f33 % 0B( w j  BA?0GSr  S 0P  2    `d01?r07   Samengevat: CS WE 1 X geheugenstand, IC is niet geactiveerd 0 0 schrijfbewerking (write) 0 1 leesbewerking (read)6   ,h|B  TD1?|B  TD1? @ l  C DA,C:\PLAATJES\print.BMPH  0޽h ? f335& Pu( w r  S $0 `p 2 j  BA?`  Z01?  @00 ?Terug naar menu  T1?  @00l  C DA,C:\PLAATJES\print.BMPH  0޽h ? f336' pv( w r  S 0 `p 2 j  BA? `l  C DA,C:\PLAATJES\print.BMP   `01?0P N:Om naar de volgende afbeelding te gaan: druk op spatiebalkH  0޽h ? f33 ( 6( w r  S 0P  2   S $0<$0 2 j  BA?0GSl  C DA,C:\PLAATJES\print.BMPH  0޽h ? f33" ) 6"."?J!(  v J N1?P P v C N1?@r  S 2P  2 j  BA?0GSl  C DA,C:\PLAATJES\print.BMP  TT21?@p MOpbouw DRAM IC 4116 (16Kx1) |  T1? |  T1?@ |B  TD1?5 5|B  TD1?0 |B  TD1? |B  TD1?U U|B  TD1?P |B  TD1? |B  TD1?  |B  TD1?  |B  TD1? ``p |B  TD1?  |B  TD1?  0 |B  TD1?  |B  TD1?  |B  TD1?u u|B @ TD1?  |B @ TD1?p `p |B @ TD1?  |B @ TD1?0  0 |B @ TD1?  |B  @ TD1?  |B !@ TD1?  |B " TD1?u  |B # TD1? |B $ TD1?P P 0 |B % TD1?` |B & TD1? p |B ' TD1?0 0  |B ( TD1?5  )  `21?   2A0 *  `21?   2A6| + T1?u  , ZZ1? v2 - N1?0 ev2 0 N1?%  |B 1 TD1?e` ` |B 2@ TD1?` |B 3@ TD1?`  `  4  `t21?< >/RAS 5  `21?4  >/CAS|B 9 TD1? @|B : TD1?|B ; TD1?@ @@|B < TD1?p @p|B = TD1? @|B > TD1? @|B ? TD1?@@|B @ TD1?pp|B A TD1?|B B TD1?| D T1?`@|B E TD1?|B F TD1?PP|B G TD1? H  `21?08 C/W Data in Data uitH  0޽h ? f33\& *  &&CC%(  v  N1?P P v  N1?@r  S T2P  4 j  BA?0GSl  C DA,C:\PLAATJES\print.BMP  T21?@p /Twee 1 uit 128 decoders met latch (D-flipflops)00|  T1? |  T1?@ |B  TD1?5 5|B  TD1?0 |B  TD1? |B  TD1?U U|B  TD1?P |B  TD1? |B  TD1?  |B  TD1?  |B  TD1? ``p |B  TD1?  |B  TD1?  0 |B  TD1?  |B  TD1?  |B  TD1?u u|B @ TD1?  |B @ TD1?p `p |B @ TD1?  |B @ TD1?0  0 |B @ TD1?  |B @ TD1?  |B @ TD1?  |B  TD1?u  |B  TD1? |B ! TD1?P P 0 |B " TD1?` |B # TD1? p |B $ TD1?0 0  |B % TD1?5  &  `21?   2A0 '  `t21?   2A6| ( T1?u  ) ZZ1? v2 * N1?0 ev2 + N1?%  |B , TD1?e` ` |B -@ TD1?` |B .@ TD1?`  `  /  `21?< >/RAS 0  `421?4  >/CAS|B 1 TD1? @|B 2 TD1?|B 3 TD1?@ @@|B 4 TD1?p @p|B 5 TD1? @|B 6 TD1? @|B 7 TD1?@@|B 8 TD1?pp|B 9 TD1?|B : TD1?| ; T1?`@|B < TD1?|B = TD1?PP|B > TD1? ?  `21?08 C/W Data in Data uit @ N1?0` ,$D 0B A N1?`  ,$D 0, B  `21?9 ,$D0 hROW adress decoder  C Tt21? p ,$D0 JCOLUMN adres decoderH  0޽h ? f33$& + %%DLd%(  v  N1?P P v  N1?@r  S 42P  4 j  BA?0GSl  C DA,C:\PLAATJES\print.BMP^  T21?@p Bij een neergaande flank op de klokingang van de decoders wordt de waarde  bevroren VV|  T1? |  T1?@ |B  TD1?5 5|B  TD1?0 |B  TD1? |B  TD1?U U|B  TD1?P |B  TD1? |B  TD1?  |B  TD1?  |B  TD1? ``p |B  TD1?  |B  TD1?  0 |B  TD1?  |B  TD1?  |B  TD1?u u|B @ TD1?  |B @ TD1?p `p |B @ TD1?  |B @ TD1?0  0 |B @ TD1?  |B @ TD1?  |B @ TD1?  |B  TD1?u  |B  TD1? |B ! TD1?P P 0 |B " TD1?` |B # TD1? p |B $ TD1?0 0  |B % TD1?5  &  `21?   2A0 '  `T21?   2A6| ( T1?u  ) ZZ1? v2 * N1?0 ev2 + N1?%  |B , TD1?e` ` |B -@ TD1?` |B .@ TD1?`  `  /  `21?< >/RAS 0  `21?4  >/CAS|B 1 TD1? @|B 2 TD1?|B 3 TD1?@ @@|B 4 TD1?p @p|B 5 TD1? @|B 6 TD1? @|B 7 TD1?@@|B 8 TD1?pp|B 9 TD1?|B : TD1?| ; T1?`@|B < TD1?|B = TD1?PP|B > TD1? ?  `21?08 C/W Data in Data uit|B G TDo?@@@|B H TDo?@|B I TDo? K Td21?  u%Edge triggered op de neergaande flank&&| L T1?" H  0޽h ? f33k# , ##@A"( w v  N1?P P   N1?@,$D0r  S $2P  4 j  BA?0GSl  C DA,C:\PLAATJES\print.BMP  T21?@p LEen 128 x 128 geheugenmatrix|  T1? |  T1?@ |B  TD1?5 5|B  TD1?0 |B  TD1? |B  TD1?U U|B  TD1?P |B  TD1? |B  TD1?  |B  TD1?  |B  TD1? ``p |B  TD1?  |B  TD1?  0 |B  TD1?  |B  TD1?  |B  TD1?u u|B @ TD1?  |B @ TD1?p `p |B @ TD1?  |B @ TD1?0  0 |B @ TD1?  |B @ TD1?  |B @ TD1?  |B  TD1?u  |B  TD1? |B ! TD1?P P 0 |B " TD1?` |B # TD1? p |B $ TD1?0 0  |B % TD1?5  &  `D21?   2A0 '  `21?   2A6| ( T1?u  ) ZZ1? v2 * N1?0 ev2 + N1?%  |B , TD1?e` ` |B -@ TD1?` |B .@ TD1?`  `  /  `21?< >/RAS 0  `d21?4  >/CAS|B 1 TD1? @|B 2 TD1?|B 3 TD1?@ @@|B 4 TD1?p @p|B 5 TD1? @|B 6 TD1? @|B 7 TD1?@@|B 8 TD1?pp|B 9 TD1?|B : TD1?| ; T1?`@|B < TD1?|B = TD1?PP|B > TD1? ?  `$21?08 C/W Data in Data uit @ N1? P,$D 0H  0޽h ? f33 & - %%0EGM%( 3xh v  N1?P P v  N1?@r  S 2P  2 j  BA?0GSl  C DA,C:\PLAATJES\print.BMP  TD21?@p _Een geheugencel wordt geactiveerd als zowel de horizontale als de verticale lijn actief (1) is.``|  T1? |  T1?@ |B  TD1?5 5|B  TD1?0 |B  TD1? |B  TD1?U U|B  TD1?P |B  TD1? |B  TD1?  |B  TD1?  |B  TD1? ``p |B  TD1?  |B  TD1?  0 |B  TD1?  |B  TD1?  |B  TD1?u u|B @ TD1?  |B @ TD1?p `p |B @ TD1?  |B @ TD1?0  0 |B @ TD1?  |B @ TD1?  |B @ TD1?  |B  TD1?u  |B  TD1? |B ! TD1?P P 0 |B " TD1?` |B # TD1? p |B $ TD1?0 0  |B % TD1?5  &  `21?   2A0 '  `21?   2A6| ( T1?u  ) ZZ1? v2 * N1?0 ev2 + N1?%  |B , TD1?e` ` |B -@ TD1?` |B .@ TD1?`  `  /  `d21?< >/RAS 0  `Ĕ21?4  >/CAS|B 1 TD1? @|B 2 TD1?|B 3 TD1?@ @@|B 4 TD1?p @p|B 5 TD31? @|B 6 TD1? @|B 7 TD1?@@|B 8 TD31?pp|B 9 TD1?|B : TD1?| ; T1?`@|B < TD1?|B = TD1?PP|B > TD1? ?  `21?08 C/W Data in Data uitv2 A N>?P0 B C ZD>?p|B D TD3Ԕ?``0 |B E TD3Ԕ?v2 F N31?  G  `D21?J j   geheugencelH  0޽h ? f334# . ""P@At"( w v  N1?P P v  N1?@r  S 2P  4 j  BA?0GSl  C DA,C:\PLAATJES\print.BMP  Tė21?@p ILogica voor datatransport|  T1? |  T1?@ |B  TD1?5 5|B  TD1?0 |B  TD1? |B  TD1?U U|B  TD1?P |B  TD1? |B  TD1?  |B  TD1?  |B  TD1? ``p |B  TD1?  |B  TD1?  0 |B  TD1?  |B  TD1?  |B  TD1?u u|B @ TD1?  |B @ TD1?p `p |B @ TD1?  |B @ TD1?0  0 |B @ TD1?  |B @ TD1?  |B @ TD1?  |B  TD1?u  |B  TD1? |B ! TD1?P P 0 |B " TD1?` |B # TD1? p |B $ TD1?0 0  |B % TD1?5  &  `$21?   2A0 '  `21?   2A6| ( T1?u  ) ZZ1? v2 * N1?0 ev2 + N1?%  |B , TD1?e` ` |B -@ TD1?` |B .@ TD1?`  `  /  `21?< >/RAS 0  `D21?4  >/CAS|B 1 TD1? @|B 2 TD1?|B 3 TD1?@ @@|B 4 TD1?p @p|B 5 TD1? @|B 6 TD1? @|B 7 TD1?@@|B 8 TD1?pp|B 9 TD1?|B : TD1?| ; T1?`@|B < TD1?|B = TD1?PP|B > TD1? ?  `T41?08 C/W Data in Data uitB A N1?Pp ,$D 0H  0޽h ? f33/  ..pTUS.(   v  N1?P P v  N1?@r  S 4P  6 j  BA?0GSl  C DA,C:\PLAATJES\print.BMP   Tt41?@p VHet IC wordt aangestuurd via een speciale schakeling: de DRAM controller (vaak n IC)WW|  T1? |  T1?@ |B  TD1?5 5|B  TD1?0 |B  TD1? |B  TD1?U U|B  TD1?P |B  TD1? |B  TD1?  |B  TD1?  |B  TD1? ``p |B  TD1?  |B  TD1?  0 |B  TD1?  |B  TD1?  |B  TD1?u u|B @ TD1? 0 |B @ TD1?p 0`p |B @ TD1? 0 |B @ TD1?0 0 0 |B @ TD1? 0 |B @ TD1? 0 |B @ TD1? 0 |B  TD1?u  |B  TD1? |B ! TD1?P P 0 |B " TD1?` |B # TD1? p |B $ TD1?0 0  |B % TD1?5  &  `41?   2A0 '  `441?   2A6| ( T1?u  ) ZZ1? v2 * N1?0 ev2 + N1?%  |B , TD1?e` ` |B -@ TD1?0` |B .@ TD1?` 0 `  /  `41?< >/RAS 0  `41?4  >/CAS|B 1 TD1? @|B 2 TD1?|B 3 TD1?@ @@|B 4 TD1?p @p|B 5 TD1? @|B 6 TD1? @|B 7 TD1?@@|B 8 TD1?pp|B 9 TD1?|B : TD1?| ; T1?`@|B < TD1?|B = TD1?PP|B > TD1? ?  `41?08 C/W Data in Data uitv A N31?@0  B  `t41?  BDRAM controller|B C TD1?  |B D TD1?  |B E TD1?  |B F TD1?  |B G TD1?@ @ |B H TD1?p p |B I TD1?  |B J TD1?  |B K TD1?  |B L TD1?0 0 |B M TD1?` ` |B N TD1?  |B O TD1?  |B P TD1?   Q  `41?   2A0 R  `441? 0  3A13 S  f.41?N j'  BADRESBUS COMPUTER|B T TD1?0 0  U  `T41?pD  3/CSH  0޽h ? f33J/  ..TT.(  v  N1?P P v  N1?@r  S 4P  4 j  BA?0GSl  C DA,C:\PLAATJES\print.BMPA  Tt41?@p kWe gaan nu stap voor stap bekijken hoe een bit uit het geheugen wordt gelezen (read), of geschreven (WRITE)llO|  T1? |  T1?@ |B  TD1?5 5|B  TD1?0 |B  TD1? |B  TD1?U U|B  TD1?P |B  TD1? |B  TD1?  |B  TD1?  |B  TD1? ``p |B  TD1?  |B  TD1?  0 |B  TD1?  |B  TD1?  |B  TD1?u u|B @ TD1? 0 |B @ TD1?p 0`p |B @ TD1? 0 |B @ TD1?0 0 0 |B @ TD1? 0 |B @ TD1? 0 |B @ TD1? 0 |B  TD1?u  |B  TD1? |B ! TD1?P P 0 |B " TD1?` |B # TD1? p |B $ TD1?0 0  |B % TD1?5  &  `41?   2A0 '  `441?   2A6| ( T1?u  ) ZZ1? v2 * N1?0 ev2 + N1?%  |B , TD1?e` ` |B -@ TD1?0` |B .@ TD1?` 0 `  /  `41?< >/RAS 0  `41?4  >/CAS|B 1 TD1? @|B 2 TD1?|B 3 TD1?@ @@|B 4 TD1?p @p|B 5 TD1? @|B 6 TD1? @|B 7 TD1?@@|B 8 TD1?pp|B 9 TD1?|B : TD1?| ; T1?`@|B < TD1?|B = TD1?PP|B > TD1? ?  `41?08 C/W Data in Data uitv @ N31?@0  A  `t41?  BDRAM controller|B B TD1?  |B C TD1?  |B D TD1?  |B E TD1?  |B F TD1?@ @ |B G TD1?p p |B H TD1?  |B I TD1?  |B J TD1?  |B K TD1?0 0 |B L TD1?` ` |B M TD1?  |B N TD1?  |B O TD1?   P  `41?   2A0 Q  `441? 0  3A13 R  f.T#21?N j'  BADRESBUS COMPUTER|B S TD1?0 0  T  `#21?pD  3/CSH  0޽h ? f330  w0o0WW0(  v  N1?P P v  N1?@r  S t$2P  6 j  BA?0GSl  C DA,C:\PLAATJES\print.BMP  T$21?@p SAfspraak: een draad waar een 1 op staat tekenen we rood, een 0 wordt groen getekendTT|  T1? |  T1?@ |B  TD1?5 5|B  TD1?0 |B  TD1? |B  TD1?U U|B  TD1?P |B  TD1? |B  TD1?  |B  TD1?  |B  TD1? ``p |B  TD1?  |B  TD1?  0 |B  TD1?  |B  TD1?  |B  TD1?u u|B @ TD1? 0 |B @ TD1?p 0`p |B @ TD1? 0 |B @ TD1?0 0 0 |B @ TD1? 0 |B @ TD1? 0 |B @ TD1? 0 |B  TD1?u  |B  TD1? |B ! TD1?P P 0 |B " TD1?` |B # TD1? p |B $ TD1?0 0  |B % TD1?5  &  `4%21?   2A0 '  `%21?   2A6| ( T1?u  ) ZZ1? v2 * N1?0 ev2 + N1?%  |B , TD1?e` ` |B -@ TD1?0` |B .@ TD1?` 0 `  /  `%21?< >/RAS 0  `T&21?4  >/CAS|B 1 TD1? @|B 2 TD1?|B 3 TD1?@ @@|B 4 TD1?p @p|B 5 TD1? @|B 6 TD1? @|B 7 TD1?@@|B 8 TD1?pp|B 9 TD1?|B : TD1?| ; T1?`@|B < TD1?|B = TD1?PP|B > TD1? ?  `'21?08 C/W Data in Data uitv @ N31?@0  A  `'21?  BDRAM controller|B B TD1?  |B C TD1?  |B D TD1?  |B E TD1?  |B F TD1?@ @ |B G TD1?p p |B H TD1?  |B I TD1?  |B J TD1?  |B K TD1?0 0 |B L TD1?` ` |B M TD1?  |B N TD1?  |B O TD1?   P  `4(21?   2A0 Q  `(21? 0  3A13 R  f.T)21?N j'  BADRESBUS COMPUTER|B S TD1?0 0  T  `)21?pD  3/CS|B U TD1? ` |B V TD31? `  W  `*21?@ L F  0 1H  0޽h ? f335  <545_`4( L\P v  N1?P P v  N1?@r  S *2P  2 j  BA?0GSl  C DA,C:\PLAATJES\print.BMP  T4+21?@p TOp de adres bus staat 0302H en er is een /CS signaal. /RAS en /CAS zijn beide nog 1.UU|  T1? |  T1?@ |B  TD1?5 5|B  TD1?0 |B  TD1? |B  TD1?U U|B  TD1?P |B  TD1? |B  TD1?  |B  TD1?  |B  TD1? ``p |B  TD1?  |B  TD1?  0 |B  TD1?  |B  TD1?  |B  TD1?u u|B @ TD1? 0 |B @ TD1?p 0`p |B @ TD1? 0 |B @ TD1?0 0 0 |B @ TD1? 0 |B @ TD1? 0 |B @ TD1? 0 |B  TD1?u  |B  TD1? |B ! TD1?P P 0 |B " TD1?` |B # TD1? p |B $ TD1?0 0  |B % TD1?5  &  `+21?   2A0 '  `+21?   2A6| ( T1?u  ) ZZ1? v2 * N1?0 ev2 + N1?%  |B , TD31?e` ` |B -@ TD31?0` |B .@ TD31?` 0 `  /  `T,21?< >/RAS 0  `,21?4  >/CAS|B 1 TD1? @|B 2 TD1?|B 3 TD1?@ @@|B 4 TD1?p @p|B 5 TD1? @|B 6 TD1? @|B 7 TD1?@@|B 8 TD1?pp|B 9 TD1?|B : TD1?| ; T1?`@|B < TD1?|B = TD1?PP|B > TD1? ?  `t-21?08 C/W Data in Data uitv @ N31?@0  A  `4.21?  BDRAM controller|B B TD1?  |B C TD1?  |B D TD1?  |B E TD1?  |B F TD1?@ @ |B G TD31?p p |B H TD31?  |B I TD1?  |B J TD1?  |B K TD1?0 0 |B L TD1?` ` |B M TD1?  |B N TD31?  |B O TD1?   P  `.21?   2A0 Q  `.21? 0  3A13 R  f.61?N j'  BADRESBUS COMPUTER|B S TD1?0 0  T  `61?pD  3/CS|B U TD1? ` |B V TD31? `  W  `T61?@ L F  0 1|B Y TD1?P|B Z TD1? |B [ TD1?P|B \ TD1?P P ]  `61? P >/RAS ^  `61?P >/CAS|B _ TDo?`@`|B ` TDo?@H  0޽h ? f339  88fgT8( ( v  N1?P P v  N1?@r  S Ԧ6P  8 j  BA?0GSl  C DA,C:\PLAATJES\print.BMP  T461?@p p@De DRAM controller verbindt de adreslijnen A0 t/m A6 met het ICAA|  T1? |  T1?@ |B  TD1?5 5|B  TD1?0 |B  TD1? |B  TD1?U U|B  TD1?P |B  TD31? |B  TD1?  |B  TD1?  |B  TD1? ``p |B  TD1?  |B  TD1?  0 |B  TD31?  |B  TD1?  |B  TD1?u u|B @ TD1? 0 |B @ TD1?p 0`p |B @ TD1? 0 |B @ TD1?0 0 0 |B @ TD31? 0 |B @ TD1? 0 |B @ TD1? 0 |B  TD1?u  |B  TD31? |B ! TD1?P P 0 |B " TD1?` |B # TD1? p |B $ TD1?0 0  |B % TD1?5  &  `61?   2A0 '  `61?   2A6| ( T1?u  ) ZZ1? v2 * N1?0 ev2 + N1?%  |B , TD31?e` ` |B -@ TD31?0` |B .@ TD31?` 0 `  /  `T61?< >/RAS 0  `61?4  >/CAS|B 1 TD1? @|B 2 TD1?|B 3 TD1?@ @@|B 4 TD1?p @p|B 5 TD1? @|B 6 TD1? @|B 7 TD1?@@|B 8 TD1?pp|B 9 TD1?|B : TD1?| ; T1?`@|B < TD1?|B = TD1?PP|B > TD1? ?  `t61?08 C/W Data in Data uitv @ N31?@0  A  `461?  BDRAM controller|B B TD1?  |B C TD1?  |B D TD1?  |B E TD1?  |B F TD1?@ @ |B G TD31?p p |B H TD31?  |B I TD1?  |B J TD1?  |B K TD1?0 0 |B L TD1?` ` |B M TD1?  |B N TD31?  |B O TD1?   P  `61?   2A0 Q  `61? 0  3A13 R  f.61?N j'  BADRESBUS COMPUTER|B S TD1?0 0  T  `61?pD  3/CS|B U TD1? ` |B V TD31? `  W  `t61?@ L F  0 1|B X TD1?P|B Y TD1? |B Z TD1?P|B [ TD1?P P \  `Ԭ61? P >/RAS ]  `461?P >/CAS|B ^ TDo?`@`|B _ TDo?@|B ` TD1? 0 |B b TD1? 0 |B c TD1? 0 |B d@ TD1?p 00 |B e@ TD1? 0` |B f@ TD1?0 0 |B g@ TD1? 0 H  0޽h ? f33 :  99hiI9(  v  N1?P P v  N1?@r  S 6P  8 j  BA?0GSl  C DA,C:\PLAATJES\print.BMP  TT61?@p ]-Vervolgens maakt de DRAM controller /RAS laag..|  T1? |   T1?@ |B   TD1?5 5|B   TD1?0 |B   TD1? |B   TD1?U U|B  TD1?P |B  TD31? |B  TD1?  |B  TD1?  |B  TD1? ``p |B  TD1?  |B  TD1?  0 |B  TD31?  |B  TD1?  |B  TD1?u u|B @ TD1? 0 |B @ TD1?p 0`p |B @ TD1? 0 |B @ TD1?0 0 0 |B @ TD31? 0 |B @ TD1? 0 |B @ TD1? 0 |B  TD1?u  |B   TD31? |B ! TD1?P P 0 |B " TD1?` |B # TD1? p |B $ TD1?0 0  |B % TD1?5  &  `61?   2A0 '  `61?   2A6| ( T1?u  ) ZZ1? v2 * N1?0 ev2 + N1?%  |B , TD1?e` ` |B -@ TD1?0` |B .@ TD31?` 0 `  /  `t61?< >/RAS 0  `ԯ61?4  >/CAS|B 1 TD1? @|B 2 TD1?|B 3 TD1?@ @@|B 4 TD1?p @p|B 5 TD1? @|B 6 TD1? @|B 7 TD1?@@|B 8 TD1?pp|B 9 TD1?|B : TD1?| ; T1?`@|B < TD1?|B = TD1?PP|B > TD1? ?  `D81?08 C/W Data in Data uitv @ N31?@0  A  `81?  BDRAM controller|B B TD1?  |B C TD1?  |B D TD1?  |B E TD1?  |B F TD1?@ @ |B G TD31?p p |B H TD31?  |B I TD1?  |B J TD1?  |B K TD1?0 0 |B L TD1?` ` |B M TD1?  |B N TD31?  |B O TD1?   P  `d81?   2A0 Q  `ı81? 0  3A13 R  f.81?N j'  BADRESBUS COMPUTER|B S TD1?0 0  T  `81?pD  3/CS|B U TD1? ` |B V TD31? `  W  `D81?@ L F  0 1|B X TD1?P|B Y TD1? |B Z TD1?P|B [ TD1?P P \  `81? P >/RAS ]  `81?P >/CAS|B ^ TDo?``|B _ TDo?@|B ` TD1? 0 |B a TD1? 0 |B b TD1? 0 |B c@ TD1?p 00 |B d@ TD1? 0` |B e@ TD1?0 0 |B f@ TD1? 0 |B h TDo?@@p|B i TDo?p@pH  0޽h ? f33:  ::0iq0:(  v  N1?P P v  N1?@r  S Ĵ8P  8 j  BA?0GSl  C DA,C:\PLAATJES\print.BMPD  T$81?@ nDoor deze negatieve flank worden de D-flipflops in de row-decoder geklokt en wordt een van de uitgang 2 actiefoo66|  T1? |   T1?@ |B   TD1?5 5|B   TD1?0 |B   TD1? |B   TD1?U U|B  TD1?P |B  TD31? |B  TD1?  |B  TD1?  |B  TD1? ``p |B  TD1?  |B  TD1?  0 |B  TD31?  |B  TD1?  |B  TD1?u u|B @ TD1? 0 |B @ TD1?p 0`p |B @ TD1? 0 |B @ TD1?0 0 0 |B @ TD31? 0 |B @ TD1? 0 |B @ TD1? 0 |B  TD1?u  |B   TD31? |B ! TD1?P P 0 |B " TD1?` |B # TD1? p |B $ TD1?0 0  |B % TD1?5  &  `81?   2A0 '  `81?   2A6| ( T1?u  ) ZZ1? v2 * N1?0 ev2 + N1?%  |B , TD1?e` ` |B -@ TD1?0` |B .@ TD31?` 0 `  /  `D81?< >/RAS 0  `81?4  >/CAS|B 1 TD1? @|B 2 TD1?|B 3 TD1?@ @@|B 4 TD31?p @p|B 5 TD1? @|B 6 TD1? @|B 7 TD1?@@|B 8 TD1?pp|B 9 TD1?|B : TD1?| ; T1?`@|B < TD1?|B = TD1?PP|B > TD1? ?  `d81?08 C/W Data in Data uitv @ N31?@0  A  `$81?  BDRAM controller|B B TD1?  |B C TD1?  |B D TD1?  |B E TD1?  |B F TD1?@ @ |B G TD31?p p |B H TD31?  |B I TD1?  |B J TD1?  |B K TD1?0 0 |B L TD1?` ` |B M TD1?  |B N TD31?  |B O TD1?   P  `81?   2A0 Q  `81? 0  3A13 R  f.81?N j'  BADRESBUS COMPUTER|B S TD1?0 0  T  `81?pD  3/CS|B U TD1? ` |B V TD31? `  W  `d81?@ L F  0 1|B ` TD1? 0 |B a TD1? 0 |B b TD1? 0 |B c@ TD1?p 00 |B d@ TD1? 0` |B e@ TD1?0 0 |B f@ TD1? 0 |B g TD1?P|B h TD1? |B i TD1?P|B j TD1?P P k  `ĺ81? P >/RAS l  `$81?P >/CAS|B m TDo?``|B n TDo?@|B o TDo?@@p|B p TDo?p@p|" q T1?  H  0޽h ? f33;  5;-;Pjk:( NbR v  N1?P P v  N1?@r  S Y;P  ; j  BA?0GSl  C DA,C:\PLAATJES\print.BMPU  T4Z;1?@ mDaarna verbindt de controler de adreslijnen A7 t/m A13 met het IC en maakt /CAS (column address strobe) laag.nn, <|  T1? |   T1?@ |B   TD1?5 5|B   TD1?0 |B   TD1? |B   TD1?U U|B  TD1?P |B  TD31? |B  TD1?  |B  TD1?  |B  TD1? ``p |B  TD1?  |B  TD1?  0 |B  TD31?  |B  TD31?  |B  TD31?u u|B @ TD1? 0 |B @ TD1?p 0`p |B @ TD1? 0 |B @ TD1?0 0 0 |B @ TD31? 0 |B @ TD31? 0 |B @ TD1? 0 |B  TD31?u  |B   TD31? |B ! TD1?P P 0 |B " TD1?` |B # TD1? p |B $ TD1?0 0  |B % TD1?5  &  `Z;1?   2A0 '  `Z;1?   2A6| ( T1?u  ) ZZ1? v2 * N1?0 ev2 + N1?%  |B , TD1?e` ` |B -@ TD1?0` |B .@ TD1?` 0 `  /  `T[;1?< >/RAS 0  `[;1?4  >/CAS|B 1 TD1? @|B 2 TD1?|B 3 TD1?@ @@|B 4 TD31?p @p|B 5 TD1? @|B 6 TD1? @|B 7 TD1?@@|B 8 TD1?pp|B 9 TD1?|B : TD1?| ; T1?`@|B < TD1?|B = TD1?PP|B > TD1? ?  `t\;1?08 C/W Data in Data uitv @ N31?@0  A  `4];1?  BDRAM controller|B B TD1?  |B C TD1?  |B D TD1?  |B E TD1?  |B F TD1?@ @ |B G TD31?p p |B H TD31?  |B I TD1?  |B J TD1?  |B K TD1?0 0 |B L TD1?` ` |B M TD1?  |B N TD31?  |B O TD1?   P  `];1?   2A0 Q  `];1? 0  3A13 R  f.^;1?N j'  BADRESBUS COMPUTER|B S TD1?0 0  T  `_;1?pD  3/CS|B U TD1? ` |B V TD31? `  W  `t_;1?@ L F  0 1|B X TD1? 0 |B Y TD1? 0 |B Z TD1? 0 |B [ TD1? `0p |B \ TD1? 0 |B ] TD1?@ 00 |B ^ TD1?p 0 |B _ TD1?P|B ` TD1? |B a TD1?P|B b TD1?P P c  `_;1? P >/RAS d  `4`;1?P >/CAS|B e TDo?``|B f TDo?@|B g TDo?@@p|B h TDo?p@Pp|B j TDo?` |B k TDo? P H  0޽h ? f33;  ;;pkk&;(  v  N1?P P v  N1?@r  S `;P  ; j  BA?0GSl  C DA,C:\PLAATJES\print.BMP2  TTa;1?@ \Door de neergaande flank op de column addres decoder wordt uitgang 3 van deze decoder actief]]&1|  T1? |   T1?@ |B   TD1?5 5|B   TD1?0 |B   TD1? |B   TD1?U U|B  TD1?P |B  TD31? |B  TD1?  |B  TD1?  |B  TD1? ``p |B  TD1?  |B  TD1?  0 |B  TD31?  |B  TD31?  |B  TD31?u u|B @ TD1? 0 |B @ TD1?p 0`p |B @ TD1? 0 |B @ TD1?0 0 0 |B @ TD31? 0 |B @ TD31? 0 |B @ TD1? 0 |B  TD31?u  |B   TD31? |B ! TD1?P P 0 |B " TD1?` |B # TD1? p |B $ TD1?0 0  |B % TD1?5  &  `a;1?   2A0 '  `b;1?   2A6| ( T1?u  ) ZZ1? v2 * N1?0 ev2 + N1?%  |B , TD1?e` ` |B -@ TD1?0` |B .@ TD1?` 0 `  /  `tb;1?< >/RAS 0  `b;1?4  >/CAS|B 1 TD1? @|B 2 TD1?|B 3 TD1?@ @@|B 4 TD31?p @p|B 5 TD1? @|B 6 TD1? @|B 7 TD1?@@|B 8 TD1?pp|B 9 TD1?|B : TD31?| ; T1?`@|B < TD1?|B = TD1?PP|B > TD1? ?  `c;1?08 C/W Data in Data uitv @ N31?@0  A  `Td;1?  BDRAM controller|B B TD1?  |B C TD1?  |B D TD1?  |B E TD1?  |B F TD1?@ @ |B G TD31?p p |B H TD31?  |B I TD1?  |B J TD1?  |B K TD1?0 0 |B L TD1?` ` |B M TD1?  |B N TD31?  |B O TD1?   P  `d;1?   2A0 Q  `e;1? 0  3A13 R  f.d;1?N j'  BADRESBUS COMPUTER|B S TD1?0 0  T  `;1?pD  3/CS|B U TD1? ` |B V TD31? `  W  `$;1?@ L F  0 1|B X TD1? 0 |B Y TD1? 0 |B Z TD1? 0 |B [ TD1? `0p |B \ TD1? 0 |B ] TD1?@ 00 |B ^ TD1?p 0 |B _ TD1?P|B ` TD1? |B a TD1?P|B b TD1?P P c  `;1? P >/RAS d  `;1?P >/CAS|B e TDo?``|B f TDo?@|B g TDo?@@p|B h TDo?p@Pp|B i TDo?` |B j TDo? P |" k T1?pH  0޽h ? f33;   ;~;kk ;( H  v   N1?P P v   N1?@r   S ;P  = j   BA?0GSl   C DA,C:\PLAATJES\print.BMP"   T;1?@ LAls beide strobe signalen 0 zijn is de aangewezen geheugen cel geactiveerd.MM <|   T1? |   T1?@ |B   TD1?5 5|B   TD1?0 |B   TD1? |B   TD1?U U|B   TD1?P |B   TD31? |B   TD1?  |B   TD1?  |B   TD1? ``p |B   TD1?  |B   TD1?  0 |B   TD31?  |B   TD31?  |B   TD31?u u|B  @ TD1? 0 |B  @ TD1?p 0`p |B  @ TD1? 0 |B  @ TD1?0 0 0 |B  @ TD31? 0 |B  @ TD31? 0 |B  @ TD1? 0 |B   TD31?u  |B   TD31? |B !  TD1?P P 0 |B "  TD1?` |B #  TD1? p |B $  TD1?0 0  |B %  TD1?5  &   `d;1?   2A0 '   `;1?   2A6| (  T1?u  )  ZZ1? v2 *  N1?0 ev2 +  N1?%  |B ,  TD1?e` ` |B - @ TD1?0` |B . @ TD1?` 0 `  /   `$;1?< >/RAS 0   `;1?4  >/CAS|B 1  TD1? @|B 2  TD1?|B 3  TD1?@ @@|B 4  TD31?p @p|B 5  TD1? @|B 6  TD1? @|B 7  TD1?@@|B 8  TD1?pp|B 9  TD1?|B :  TD31?| ;  T1?`@|B <  TD1?|B =  TD1?PP|B >  TD1? ?   `D;1?08 C/W Data in Data uitv @  N31?@0  A   `;1?  BDRAM controller|B B  TD1?  |B C  TD1?  |B D  TD1?  |B E  TD1?  |B F  TD1?@ @ |B G  TD31?p p |B H  TD31?  |B I  TD1?  |B J  TD1?  |B K  TD1?0 0 |B L  TD1?` ` |B M  TD1?  |B N  TD31?  |B O  TD1?   P   `d;1?   2A0 Q   `;1? 0  3A13 R   f.;1?N j'  BADRESBUS COMPUTER|B S  TD1?0 0  T   `;1?pD  3/CS|B U  TD1? ` |B V  TD31? `  W   `D;1?@ L F  0 1|B X  TD1? 0 |B Y  TD1? 0 |B Z  TD1? 0 |B [  TD1? `0p |B \  TD1? 0 |B ]  TD1?@ 00 |B ^  TD1?p 0 |B _  TD1?P|B `  TD1? |B a  TD1?P|B b  TD1?P P c   `;1? P >/RAS d   `;1?P >/CAS|B e  TDo?``|B f  TDo?@|B g  TDo?@@p|B h  TDo?p@@p|B i  TDo?` |B j  TDo? @ |" k  T1? H   0޽h ? f33=   4=,=kl(<( p@ (v ( N1?P P v ( N1?@r ( S ;P  ; j ( BA?0GSl ( C DA,C:\PLAATJES\print.BMP ( T$;1?@ NAls er een READ bewerking moet worden uitgevoerd, moet de /W lijn 1 zijn. De inhoud van de geheugencel wordt op de  data out aansluiting gezet| ( T1? |  ( T1?@ |B  ( TD1?5 5|B  ( TD1?0 |B  ( TD1? |B  ( TD1?U U|B ( TD1?P |B ( TD31? |B ( TD1?  |B ( TD1?  |B ( TD1? ``p |B ( TD1?  |B ( TD1?  0 |B ( TD31?  |B ( TD31?  |B ( TD31?u u|B (@ TD1? 0 |B (@ TD1?p 0`p |B (@ TD1? 0 |B (@ TD1?0 0 0 |B (@ TD31? 0 |B (@ TD31? 0 |B (@ TD1? 0 |B ( TD31?u  |B  ( TD31? |B !( TD1?P P 0 |B "( TD1?` |B #( TD1? p |B $( TD1?0 0  |B %( TD1?5  &(  `;1?   2A0 '(  `;1?   2A6| (( T1?u  )( ZZ1? v2 *( N1?0 ev2 +( N1?%  |B ,( TD1?e` ` |B -(@ TD1?0` |B .(@ TD1?` 0 `  /(  `D;1?< >/RAS 0(  `;1?4  >/CAS|B 1( TD1? @|B 2( TD1?|B 3( TD1?@ @@|B 4( TD31?p @p|B 5( TD1? @|B 6( TD1? @|B 7( TD1?@@|B 8( TD1?pp|B 9( TD1?|B :( TD31?| ;( T1?`@|B <( TD3Ԕ?|B =( TD1?PP|B >( TD1? ?(  `=1?08 C/W Data in Data uitv @( N31?@0  A(  `=1?  BDRAM controller|B B( TD1?  |B C( TD1?  |B D( TD1?  |B E( TD1?  |B F( TD1?@ @ |B G( TD31?p p |B H( TD31?  |B I( TD1?  |B J( TD1?  |B K( TD1?0 0 |B L( TD1?` ` |B M( TD1?  |B N( TD31?  |B O( TD1?   P(  `=1?   2A0 Q(  `t=1? 0  3A13 R(  f.4=1?N j'  BADRESBUS COMPUTER|B S( TD1?0 0  T(  `=1?pD  3/CS|B U( TD1? ` |B V( TD31? `  W(  `=1?@ L F  0 1|B X( TD1? 0 |B Y( TD1? 0 |B Z( TD1? 0 |B [( TD1? `0p |B \( TD1? 0 |B ]( TD1?@ 00 |B ^( TD1?p 0 |B _( TD1?P|B `( TD1? |B a( TD1?P|B b( TD1?P P c(  `T=1? P >/RAS d(  `=1?P >/CAS|B e( TDo?``|B f( TDo?@|B g( TDo?@@p|B h( TDo?p@@p|B i( TDo?` |B j( TDo? @ z l(  BCxDELF$Ԕ?H8` 0@P(P@hXhp(xpp@      p,$D 0H ( 0޽h ? f33N=   <<kl0<( d< 0v 0 N1?P P v 0 N1?@r 0 S t=P  ; j 0 BA?0GSl 0 C DA,C:\PLAATJES\print.BMP 0 TԒ=1?@ Voor een WRITE bewerking maken we /W=0. De data wordt nu van de  data in aansluiting gekopieerd naar de geheugenceluu| 0 T1? |  0 T1?@ |B  0 TD1?5 5|B  0 TD1?0 |B  0 TD1? |B  0 TD1?U U|B 0 TD1?P |B 0 TD31? |B 0 TD1?  |B 0 TD1?  |B 0 TD1? ``p |B 0 TD1?  |B 0 TD1?  0 |B 0 TD31?  |B 0 TD31?  |B 0 TD31?u u|B 0@ TD1? 0 |B 0@ TD1?p 0`p |B 0@ TD1? 0 |B 0@ TD1?0 0 0 |B 0@ TD31? 0 |B 0@ TD31? 0 |B 0@ TD1? 0 |B 0 TD31?u  |B  0 TD31? |B !0 TD1?P P 0 |B "0 TD1?` |B #0 TD1? p |B $0 TD1?0 0  |B %0 TD1?5  &0  `4=1?   2A0 '0  `=1?   2A6| (0 T1?u  )0 ZZ1? v2 *0 N1?0 ev2 +0 N1?%  |B ,0 TD1?e` ` |B -0@ TD1?0` |B .0@ TD1?` 0 `  /0  `=1?< >/RAS 00  `T=1?4  >/CAS|B 10 TD1? @|B 20 TD1?|B 30 TD1?@ @@|B 40 TD31?p @p|B 50 TD1? @|B 60 TD1? @|B 70 TD1?@@|B 80 TD1?pp|B 90 TD1?|B :0 TD31?| ;0 T1?`@|B <0 TDԔ?|B =0 TD1?PP|B >0 TD1? ?0  `=1?08 C/W Data in Data uitv @0 N31?@0  A0  `ԕ=1?  BDRAM controller|B B0 TD1?  |B C0 TD1?  |B D0 TD1?  |B E0 TD1?  |B F0 TD1?@ @ |B G0 TD31?p p |B H0 TD31?  |B I0 TD1?  |B J0 TD1?  |B K0 TD1?0 0 |B L0 TD1?` ` |B M0 TD1?  |B N0 TD31?  |B O0 TD1?   P0  `4=1?   2A0 Q0  `=1? 0  3A13 R0  f.T=1?N j'  BADRESBUS COMPUTER|B S0 TD1?0 0  T0  `=1?pD  3/CS|B U0 TD1? ` |B V0 TD31? `  W0  `=1?@ L F  0 1|B X0 TD1? 0 |B Y0 TD1? 0 |B Z0 TD1? 0 |B [0 TD1? `0p |B \0 TD1? 0 |B ]0 TD1?@ 00 |B ^0 TD1?p 0 |B _0 TD1?P|B `0 TD1? |B a0 TD1?P|B b0 TD1?P P c0  `t=1? P >/RAS d0  `Ԙ=1?P >/CAS|B e0 TDo?``|B f0 TDo?@|B g0 TDo?@@p|B h0 TDo?p@@p|B i0 TDo?` |B j0 TDo? @ z l0  B@CPDELF$Ԕ?@HLPH @HPh(xxP(hD4h@      X,$D 0H 0 0޽h ? f339   99go8;9(  8v 8 N1?P P v 8 N1?@r 8 S =P  = j 8 BA?0GSl 8 C DA,C:\PLAATJES\print.BMPW 8 T ?1?@ Hierna kan de DRAM controller de multiplexer uitschakelen en de signalen /RAS en /CAS weer hoog maken. De cyclus is nu afgelopen! U| 8 T1? |  8 T1?@ |B  8 TD1?5 5|B  8 TD1?0 |B  8 TD1? |B  8 TD1?U U|B 8 TD1?P |B 8 TD1? |B 8 TD1?  |B 8 TD1?  |B 8 TD1? ``p |B 8 TD1?  |B 8 TD1?  0 |B 8 TD1?  |B 8 TD1?  |B 8 TD1?u u|B 8@ TD1? 0 |B 8@ TD1?p 0`p |B 8@ TD1? 0 |B 8@ TD1?0 0 0 |B 8@ TD1? 0 |B 8@ TD1? 0 |B 8@ TD1? 0 |B 8 TD1?u  |B  8 TD1? |B !8 TD1?P P 0 |B "8 TD1?` |B #8 TD1? p |B $8 TD1?0 0  |B %8 TD1?5  &8  `!?1?   2A0 '8  `d!?1?   2A6| (8 T1?u  )8 ZZ1? v2 *8 N1?0 ev2 +8 N1?%  |B ,8 TD31?e` ` |B -8@ TD31?0` |B .8@ TD31?` 0 `  /8  `!?1?< >/RAS 08  `$"?1?4  >/CAS|B 18 TD1? @|B 28 TD1?|B 38 TD1?@ @@|B 48 TD1?p @p|B 58 TD1? @|B 68 TD1? @|B 78 TD1?@@|B 88 TD1?pp|B 98 TD1?|B :8 TD1?| ;8 T1?`@|B <8 TD1?|B =8 TD1?PP|B >8 TD1? ?8  `"?1?08 C/W Data in Data uitv @8 N31?@0  A8  `#?1?  BDRAM controller|B B8 TD1?  |B C8 TD1?  |B D8 TD1?  |B E8 TD1?  |B F8 TD1?@ @ |B G8 TD1?p p |B H8 TD1?  |B I8 TD1?  |B J8 TD1?  |B K8 TD1?0 0 |B L8 TD1?` ` |B M8 TD1?  |B N8 TD1?  |B O8 TD1?   P8  `$?1?   2A0 Q8  `d$?1? 0  3A13 R8  f.$%?1?N j'  BADRESBUS COMPUTER|B S8 TD1?0 0  T8  `%?1?pD  3/CS|B U8 TD1? ` |B V8 TD31? `  W8  `%?1?@ L F  0 1|B _8 TD1?P|B `8 TD1? |B a8 TD1?P|B b8 TD1?P P c8  `D&?1? P >/RAS d8  `&?1?P >/CAS|B e8 TDo?``|B f8 TDo?@|B g8 TDo?@@p|B h8 TDo?p@@p|B i8 TDo?` |B j8 TDo? @ |B l8 TDo?`@@ |B m8 TDo?@@p|B n8 TDo?@|B o8 TDo?`@`H 8 0޽h ? f335/ u( w r  S d'? `p = j  BA?`  Z$(?1?  @ 00 ?Terug naar menu  T1?  @00l  C DA,C:\PLAATJES\print.BMPH  0޽h ? f330 NF0( j0` r  S (? @p ? j  BA?0 l  C DA,C:\PLAATJES\print.BMP   `D)?1?  N:Om naar de volgende afbeelding te gaan: druk op spatiebalk`  c $A  ??  H  0޽h ? f33   Pi@*( | @j @ BA?0GSl @ C DA,C:\PLAATJES\print.BMPl h@ C *?P  ?  i@ C d*?<$0 ? H @ 0޽h ? f33}$  -$%$pB_H#( NbR Hv H N1?P P v H N1?@r H S +?P  ? j H BA?0GSl H C DA,C:\PLAATJES\print.BMP H T+?1?@p ]Het IC ververst automatisch een volledige rij geheugencellen zodra deze wordt geselecteerd. ^^| H T1? |  H T1?@ |B  H TD1?5 5|B  H TD1?0 |B  H TD1? |B  H TD1?U U|B H TD1?P |B H TD1? |B H TD1?  |B H TD1?  |B H TD1? ``p |B H TD1?  |B H TD1?  0 |B H TD1?  |B H TD1?  |B H TD1?u u|B H@ TD1? 0 |B H@ TD1?p 0`p |B H@ TD1? 0 |B H@ TD1?0 0 0 |B H@ TD1? 0 |B H@ TD1? 0 |B H@ TD1? 0 |B H TD1?u  |B  H TD1? |B !H TD1?P P 0 |B "H TD1?` |B #H TD1? p |B $H TD1?0 0  |B %H TD1?5  &H  `D,?1?   2A0 'H  `o?1?   2A6| (H T1?u  )H ZZ1? v2 *H N1?0 ev2 +H N1?%  |B ,H TD31?e` ` |B -H@ TD31?0` |B .H@ TD31?` 0 `  /H  `Tp?1?< >/RAS 0H  `p?1?4  >/CAS|B 1H TD1? @|B 2H TD1?|B 3H TD1?@ @@|B 4H TD1?p @p|B 5H TD1? @|B 6H TD1? @|B 7H TD1?@@|B 8H TD1?pp|B 9H TD1?|B :H TD1?| ;H T1?`@|B H TD1? ?H  `tq?1?08 C/W Data in Data uit|B UH TD1? ` |B VH TD31? `  WH  `q?1?@ L F  0 1H H 0޽h ? f33&  &&FGX &(  Xv X N1?P P v X N1?@r X S r?P  ? j X BA?0GSl X C DA,C:\PLAATJES\print.BMPj X Tr?1?@p Als we op de adreslijnen de waarde 0000001B plaatsen en het /RAS signaal 0 maken wordt de bovenste rij geheugencellen gerefreshed.&*Xv | X T1? |  X T1?@ |B  X TD1?5 5|B  X TD1?0 |B  X TD1? |B  X TD1?U U|B X TD1?P |B X TD1? |B X TD1?  |B X TD1?  |B X TD1? ``p |B X TD1?  |B X TD1?  0 |B X TD1?  |B X TD31?  |B X TD31?u u|B X@ TD1? 0 |B X@ TD1?p 0`p |B X@ TD1? 0 |B X@ TD1?0 0 0 |B X@ TD1? 0 |B X@ TD31? 0 |B X@ TD1? 0 |B X TD31?u  |B  X TD1? |B !X TD1?P P 0 |B "X TD1?` |B #X TD1? p |B $X TD1?0 0  |B %X TD1?5  &X  `Ts?1?   2A0 'X  `s?1?   2A6| (X T1?u  )X ZZ1? v2 *X N1?0 ev2 +X N1?%  |B ,X TD1?e` ` |B -X@ TD1?0` |B .X@ TD31?` 0 `  /X  `t?1?< >/RAS 0X  `tt?1?4  >/CAS|B 1X TDԔ? @|B 2X TD1?|B 3X TD1?@ @@|B 4X TD1?p @p|B 5X TD1? @|B 6X TD1? @|B 7X TD1?@@|B 8X TD1?pp|B 9X TD1?|B :X TD1?| ;X T1?`@|B X TD1? ?X  `4u?1?08 C/W Data in Data uit|B @X TD1? ` |B AX TD31? `  BX  `u?1?@ L F  0 1|B CX TDo?@p@|B DX TDo?@pp|B EX TDo?pv" GX N1?pH X 0޽h ? f33&  &&FF`&( H `v ` N1?P P v ` N1?@r ` S Tv?P  A j ` BA?0GSl ` C DA,C:\PLAATJES\print.BMPf ` Tv?1?@p Zolang we /CAS hoog houden wordt er nooit een READ of een WRITE bewerking uitgevoerd. Maken we /RAS weer 1 dan is uitsluitend de rij gerefreshed | ` T1? |  ` T1?@ |B  ` TD1?5 5|B  ` TD1?0 |B  ` TD1? |B  ` TD1?U U|B ` TD1?P |B ` TD1? |B ` TD1?  |B ` TD1?  |B ` TD1? ``p |B ` TD1?  |B ` TD1?  0 |B ` TD1?  |B ` TD31?  |B ` TD31?u u|B `@ TD1? 0 |B `@ TD1?p 0`p |B `@ TD1? 0 |B `@ TD1?0 0 0 |B `@ TD1? 0 |B `@ TD31? 0 |B `@ TD1? 0 |B ` TD31?u  |B  ` TD1? |B !` TD1?P P 0 |B "` TD1?` |B #` TD1? p |B $` TD1?0 0  |B %` TD1?5  &`  `w?1?   2A0 '`  `tw?1?   2A6| (` T1?u  )` ZZ1? v2 *` N1?0 ev2 +` N1?%  |B ,` TD1?e` ` |B -`@ TD1?0` |B .`@ TD31?` 0 `  /`  `w?1?< >/RAS 0`  `4x?1?4  >/CAS|B 1` TDԔ? @|B 2` TD1?|B 3` TD1?@ @@|B 4` TD1?p @p|B 5` TD1? @|B 6` TD1? @|B 7` TD1?@@|B 8` TD1?pp|B 9` TD1?|B :` TD1?| ;` T1?`@|B <` TD1?|B =` TD1?PP|B >` TD1? ?`  `x?1?08 C/W Data in Data uit|B @` TD1? ` |B A` TD31? `  B`  `Ty?1?@ L F  0 1|B C` TDo?@p@|B D` TDo?@pp|B E` TDo?pv" F` N1?pH ` 0޽h ? f335  d5\5__P4( 5q Pv P N1?P P v P N1?@r P S z?P  ? j P BA?0GSl P C DA,C:\PLAATJES\print.BMP0 P Ttz?1?@ ZAls het IC niet door de processor wordt benaderd, gaat de DRAM controller het IC refreshen[[Q | P T1? |  P T1?@ |B  P TD1?5 5|B  P TD1?0 |B  P TD1? |B  P TD1?U U|B P TD1?P |B P TD1? |B P TD1?  |B P TD1?  |B P TD1? ``p |B P TD1?  |B P TD1?  0 |B P TD1?  |B P TD1?  |B P TD1?u u|B P@ TD1? 0 |B P@ TD1?p 0`p |B P@ TD1? 0 |B P@ TD1?0 0 0 |B P@ TD1? 0 |B P@ TD1? 0 |B P@ TD1? 0 |B P TD1?u  |B  P TD1? |B !P TD1?P P 0 |B "P TD1?` |B #P TD1? p |B $P TD1?0 0  |B %P TD1?5  &P  `z?1?   2A0 'P  `4{?1?   2A6| (P T1?u  )P ZZ1? v2 *P N1?0 ev2 +P N1?%  |B ,P TD31?e` ` |B -P@ TD31?0` |B .P@ TD31?` 0 `  /P  `{?1?< >/RAS 0P  `?1?4  >/CAS|B 1P TD1? @|B 2P TD1?|B 3P TD1?@ @@|B 4P TD1?p @p|B 5P TD1? @|B 6P TD1? @|B 7P TD1?@@|B 8P TD1?pp|B 9P TD1?|B :P TD1?| ;P T1?`@|B P TD1? ?P  `T?1?08 C/W Data in Data uitv @P N31?@0  AP  `?1?  BDRAM controller|B BP TD1?  |B CP TD1?  |B DP TD1?  |B EP TD1?  |B FP TD1?@ @ |B GP TD1?p p |B HP TD1?  |B IP TD1?  |B JP TD1?  |B KP TD1?0 0 |B LP TD1?` ` |B MP TD1?  |B NP TD1?  |B OP TD1?   PP  `t?1?   2A0 QP  `?1? 0  3A13 RP  f.?1?N j'  BADRESBUS COMPUTER|B SP TD1?0 0  TP  `?1?pD  3/CS|B UP TD1? ` |B VP TD31? `  WP  `T?1?@ L F  0 1|B XP TD1?P|B YP TD1? |B ZP TD1?P|B [P TD1?P P \P  `?1? P >/RAS ]P  `?1?P >/CAS|B ^P TDo?`@`|B _P TDo?@H P 0޽h ? f33Q7  76bbh6( NbR hv h N1?P P v h N1?@r h S ?P  A j h BA?0GSl h C DA,C:\PLAATJES\print.BMP h T4?1?@ sCHiertoe bevindt zich in de DRAM controller een 128 standen teller.DD| h T1? |  h T1?@ |B  h TD1?5 5|B  h TD1?0 |B  h TD1? |B  h TD1?U U|B h TD1?P |B h TD1? |B h TD1?  |B h TD1?  |B h TD1? ``p |B h TD1?  |B h TD1?  0 |B h TD1?  |B h TD1?  |B h TD1?u u|B h@ TD1? 0 |B h@ TD1?p 0`p |B h@ TD1? 0 |B h@ TD1?0 0 0 |B h@ TD1? 0 |B h@ TD1? 0 |B h@ TD1? 0 |B h TD1?u  |B  h TD1? |B !h TD1?P P 0 |B "h TD1?` |B #h TD1? p |B $h TD1?0 0  |B %h TD1?5  &h  `?1?   2A0 'h  `?1?   2A6| (h T1?u  )h ZZ1? v2 *h N1?0 ev2 +h N1?%  |B ,h TD31?e` ` |B -h@ TD31?0` |B .h@ TD31?` 0 `  /h  `T?1?< >/RAS 0h  `?1?4  >/CAS|B 1h TD1? @|B 2h TD1?|B 3h TD1?@ @@|B 4h TD1?p @p|B 5h TD1? @|B 6h TD1? @|B 7h TD1?@@|B 8h TD1?pp|B 9h TD1?|B :h TD1?| ;h T1?`@|B h TD1? ?h  `t?1?08 C/W Data in Data uitv @h N31?@0  Ah  `4?1?  BDRAM controller|B Bh TD1?  |B Ch TD1?  |B Dh TD1?  |B Eh TD1?  |B Fh TD1?@ @ |B Gh TD1?p p |B Hh TD1?  |B Ih TD1?  |B Jh TD1?  |B Kh TD1?0 0 |B Lh TD1?` ` |B Mh TD1?  |B Nh TD1?  |B Oh TD1?   Ph  `?1?   2A0 Qh  `?1? 0  3A13 Rh  f.?1?N j'  BADRESBUS COMPUTER|B Sh TD1?0 0  Th  `?1?pD  3/CS|B Uh TD1? ` |B Vh TD31? `  Wh  `t?1?@ L F  0 1|B Xh TD1?P|B Yh TD1? |B Zh TD1?P|B [h TD1?P P \h  `?1? P >/RAS ]h  `4?1?P >/CAS|B ^h TDo?`@`|B _h TDo?@| `h T1?P p  ah  fA1?   6TELLERv" bh N1?P 0 H h 0޽h ? f33$:  99fgpd9( \ pv p N1?P P v p N1?@r p S AP  A j p BA?0GSl p C DA,C:\PLAATJES\print.BMP+ p TA1?@ wAls het even kan wordt de teller aangesloten op de adreslijnen van het IC en wordt er een korte 0-puls op /RAS gegeven.xx| p T1? |  p T1?@ |B  p TD1?5 5|B  p TD1?0 |B  p TD1? |B  p TD1?U U|B p TD1?P |B p TD1? |B p TD1?  |B p TD1?  |B p TD1? ``p |B p TD1?  |B p TD1?  0 |B p TD1?  |B p TD1?  |B p TD1?u u|B p TD1?u  |B  p TD1? |B !p TD1?P P 0 |B "p TD1?` |B #p TD1? p |B $p TD1?0 0  |B %p TD1?5  &p  `dA1?   2A0 'p  `A1?   2A6| (p T1?u  )p ZZ1? v2 *p N1?0 ev2 +p N1?%  |B ,p TD1?e` ` |B -p@ TD1?0` |B .p@ TD31?` 0 `  /p  `$A1?< >/RAS 0p  `A1?4  >/CAS|B 1p TDԔ? @|B 2p TD1?|B 3p TD1?@ @@|B 4p TD1?p @p|B 5p TD1? @|B 6p TD1? @|B 7p TD1?@@|B 8p TD1?pp|B 9p TD1?|B :p TD1?| ;p T1?`@|B p TD1? ?p  `DA1?08 C/W Data in Data uitv @p N31?@0  Ap  `A1?  BDRAM controller|B Bp TD1?  |B Cp TD1?  |B Dp TD1?  |B Ep TD1?  |B Fp TD1?@ @ |B Gp TD1?p p |B Hp TD1?  |B Ip TD1?  |B Jp TD1?  |B Kp TD1?0 0 |B Lp TD1?` ` |B Mp TD1?  |B Np TD1?  |B Op TD1?   Pp  `dA1?   2A0 Qp  `A1? 0  3A13 Rp  f.A1?N j'  BADRESBUS COMPUTER|B Sp TD1?0 0  Tp  `A1?pD  3/CS|B Up TD1? ` |B Vp TD31? `  Wp  `DA1?@ L F  0 1|B Xp TD1?P|B Yp TD1? |B Zp TD1?P|B [p TD1?P P \p  `A1? P >/RAS ]p  `A1?P >/CAS|B ^p TDo?``|B _p TDo?@| `p T1?P p  ap  fdA1?   6TELLER|B p@ TD1? p |B p@ TD1?p p`p |B p@ TD1? p |B p@ TD1?0 p 0 |B p@ TD1? p |B p@ TD1? p |B p@ TD1? p |B cp TDo?@@p|B dp TDo?p@p|B ep TDo?p|B fp TDo? gp  `$A1?p uRow wordt gerefreshed$ H p 0޽h ? f33T=  =<0kmx<( H xv x N1?P P v x N1?@r x S AP  A j x BA?0GSl x C DA,C:\PLAATJES\print.BMPA x TDA1?@ kDe teller wordt nu verhoogd en er wordt weer een puls op /RAS gegeven. De volgende rij wordt nu gerefreshedll` | x T1? |  x T1?@ |B  x TD1?5 5|B  x TD1?0 |B  x TD1? |B  x TD1?U U|B x TD1?P |B x TD1? |B x TD1?  |B x TD1?  |B x TD1? ``p |B x TD1?  |B x TD1?  0 |B x TD1?  |B x TD1?  |B x TD1?u u|B x TD1?u  |B x TD1? |B x TD1?P P 0 |B x TD1?` |B x TD1? p |B x TD1?0 0  |B x TD1?5  x  `A1?   2A0  x  `A1?   2A6| !x T1?u  "x ZZ1? v2 #x N1?0 ev2 $x N1?%  |B %x TD1?e` ` |B &x@ TD1?0` |B 'x@ TD31?` 0 `  (x  `dA1?< >/RAS )x  `A1?4  >/CAS|B *x TD1? @|B +x TD1?|B ,x TDԔ?@ @@|B -x TD1?p @p|B .x TD1? @|B /x TD1? @|B 0x TD1?@@|B 1x TD1?pp|B 2x TD1?|B 3x TD1?| 4x T1?`@|B 5x TD1?|B 6x TD1?PP|B 7x TD1? 8x  `A1?08 C/W Data in Data uit 9x T?C31?@0  :  :x  `@C1?  BDRAM controller|B ;x TD1?  |B x TD1?  |B ?x TD1?@ @ |B @x TD1?p p |B Ax TD1?  |B Bx TD1?  |B Cx TD1?  |B Dx TD1?0 0 |B Ex TD1?` ` |B Fx TD1?  |B Gx TD1?  |B Hx TD1?   Ix  `@C1?   2A0 Jx  `DAC1? 0  3A13 Kx  f.BC1?N j'  BADRESBUS COMPUTER|B Lx TD1?0 0  Mx  `dBC1?pD  3/CS|B Nx TD1? ` |B Ox TD31? `  Px  `BC1?@ L F  0 1|B Qx TD1?P|B Rx TD1? |B Sx TD1?P|B Tx TD1?P P Ux  `$CC1? P >/RAS Vx  `CC1?P >/CAS|B Wx TDo?``|B Xx TDo?@| Yx T1?P p  Zx  fCC1?   6TELLER|B [x@ TD1? p |B \x@ TD1?p p`p |B ]x@ TD1? p |B ^x@ TD1?0 p 0 |B _x@ TD1? p |B `x@ TD1? p |B ax@ TD1? p |B bx TDo?@@p|B cx TDo?p@p|B dx TDo?p|B ex TDo?" hx TDDC1? @p  6+1|B ix TDo?p|B jx TDo?pPp|B kx TDo?PPp|B lx TDo?P mx  `EC1?p uRow wordt gerefreshed$ H x 0޽h ? f33;  P;H;Pij:( H v  N1?P P v  N1?@r  S ECP  + j  BA?0GSl  C DA,C:\PLAATJES\print.BMP\  T$FC1?@ LET OP: /CAS blijft 1 en de teller moet binnen 2 ms alle standen doorlopen. Als dit in gevaar komt kan de controller toegang weigeren1S|  T1? |   T1?@ |B   TD1?5 5|B   TD1?0 |B   TD1? |B   TD1?U U|B  TD1?P |B  TD1? |B  TD1?  |B  TD1?  |B  TD1? ``p |B  TD1?  |B  TD1?  0 |B  TD1?  |B  TD1?  |B  TD1?u u|B  TD1?u  |B  TD1? |B  TD1?P P 0 |B  TD1?` |B  TD1? p |B  TD1?0 0  |B  TD1?5    `FC1?   2A0    `FC1?   2A6| ! T1?u  " ZZ1? v2 # N1?0 ev2 $ N1?%  |B % TD1?e` ` |B &@ TD1?0` |B '@ TD31?` 0 `  (  `DGC1?< >/RAS )  `GC1?4  >/CAS|B * TD1? @|B + TD1?|B , TD1?@ @@|B - TD1?p @p|B . TD1? @|B / TD1? @|B 0 TD1?@@|B 1 TD1?pp|B 2 TD1?|B 3 TD1?| 4 T1?`@|B 5 TD1?|B 6 TD1?PP|B 7 TD1? 8  `dHC1?08 C/W Data in Data uit 9 THC31?@0  :  :  `IC1?  BDRAM controller|B ; TD1?  |B < TD1?  |B = TD1?  |B > TD1?  |B ? TD1?@ @ |B @ TD1?p p |B A TD1?  |B B TD1?  |B C TD1?  |B D TD1?0 0 |B E TD1?` ` |B F TD1?  |B G TD1?  |B H TD1?   I  `IC1?   2A0 J  `DJC1? 0  3A13 K  f.KC1?N j'  BADRESBUS COMPUTER|B L TD1?0 0  M  `dKC1?pD  3/CS|B N TD1? ` |B O TD31? `  P  `C1?@ L F  0 1|B Q TD1?P|B R TD1? |B S TD1?P|B T TD1?P P U  `DC1? P >/RAS V  `C1?P >/CAS|B W TDo?``|B X TDo?@| Y T1?P p  Z  fC1?   6TELLER|B [@ TD1? p |B \@ TD1?p p`p |B ]@ TD1? p |B ^@ TD1?0 p 0 |B _@ TD1? p |B `@ TD1? p |B a@ TD1? p |B b TDo?@@p|B c TDo?p@p|B d TDo?p|B e TDo?|B g TDo?p|B h TDo?pPp|B i TDo?PPp|B j TDo?PH  0޽h ? f33i1 p( w r  S C p`@ A j  BA?`  ZC1? 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