
  祭  KAY-1024

  ਠ 256

   ⮬ ਠ   㯭
 256,  ⮬    1
ࠧ   . , 
ன ⢫ , 
   ॣ஢ #1ffd  #7ffd.

    㦭 ᤥ 
।:

   뫮:             ⠫:

                           
    15              15     
   0OE         0OE   
            680
         D47                 D47

.. ࠧࢠ ண  15D47  
   ࠧ १ 680 .

   㦭 뢥  ⥬
ࠧꥬ 騥 ᨣ.  
奬  ⥬ ࠧꥬ ᢮ 5
⠪⮢ (A17, A18, B20, B22, B23),
஬ ⮣,  ᢮
⠪ 3A, 6A, 7A  14A, 
ᮥ   (3A  +5). 
 ᫥騬 ࠧ:

  Ŀ
       㤠  
  Ĵ
     A14'     4D47          
                            
     A15'     7D47          
                            
     A16'     9D47          
                            
     A17'     12D47         
                            
     AEN      15D47         
     ___                    
     INT      10D53         
                            
     CLK2     3D3           
  

   뢮  ᢮
⠪ ⥬ ࠧꥬ
ந ࠧ,  ⮬ 㤮⢠,
 ⮬ 㦭 㤥  , ⮡
" ⠭⮬".
  ⠫ ᨣ, ᫠  㦥
  ⥬ ࠧꥬ. 
ᮮ⢥⢨ ᨣ .ࠧꥬ KAY
 DMA:

  Ŀ
   DMAN ⠪  KAY
  Ĵ
     A0         A9         A0      
                                   
     A1         A10        A1      
                                   
     A2         A11        A2      
                                   
     A3         A12        A3      
                                   
     A4         A24        A4      
                                   
     A5         A23        A5      
                                   
     A6         A22        A6      
                                   
     A7         A21        A7      
                                   
     A8         B26        A8      
                                   
     A9         A27        A9      
                                   
     A10        B27        A10     
                                   
     A11        A28        A11     
                                   
     A12        A2         A12     
                                   
     A13        B2         A13     
                                   
     A14        A1         A14     
                                   
     A15        B1         A15     
                                   
     D0         B6         D0      
                                   
     D1         B7         D1      
                                   
     D2         B8         D2      
                                   
     D3         B11        D3      
                                   
     D4         B12        D4      
                                   
     D5         B10        D5      
                                   
     D6         B9         D6      
                                   
     D7         B3         D7      
     ____                          
     MREQ       B16        MREQ    
     ____                          
     IORQ       B17        IORQ    
     __                            
     RD         B18        RD      
     __                            
     WR         B19        WR      
     _____                         
     BUSRQ      A19        BRQ     
     _____                         
     BUSAK      A26        BAK     
     ____                          
     INT'       B13        INT     
     __                            
     M1         B24        M1      
     ___                           
     RES        A20        RES     
                                   
     CLK        A8         CLK     
  


   CLK  奬 KAY 
। -  奬  㪠,
    6Z80,   ⭮
஭,  奬 ࠧ .
ࠧꥬ -  6D2.  ଠ쭮 ࠡ
DMA ᨣ CLK    6D2, 
  .  㦭 易⥫쭮
஢.___
   AEN, A17'i  A18' 
ᯮ. ஬ ⮣,   DMA
㦭 १ A17'  3DD3.
       .  ᮦ, 
KAY  ⮢ ⮭ ⨪
ᤥ  "" ࠤ
ࠤ-1, .. ⮭ ⪫
 ⮫쪮  த #1f  #df,  
     ⮢.
 ࠢ쭮 樨 (xx0xxxxx)
 (000xxxxx) ᤥ ᮫⭮ 
(xxxxxx11). , ਬ,  
 ࠭஢ (᫨  , 
ணࠬ   ਢ 
   ).
  ⮡ ᢮   DMA 㦭
ᤥ ᫥饥:
  1.   DMA  奬 DD3.
  2. १ ,  ࠭ 諮  
1,2  3 .
  3.    ⠪ ࠧ:

          2Ŀ
  6DD4  Ĵ1  3
          1    IOGE (A13 ..)
     A3  Ĵ  
           

  ,    ᫠...


  ਠ 1024k

   㦥  㦥...
  -, 㦭 ਫ  
   奬, 
⮣, ⮡    
 A18  A19. -, ᫨
⭮,  -襬  ।
  1  ( 
    ).  
  -..  ࠧᠭ
 ⠬    몠 㣠.
 ᮢ⨬    ⠭⮬
  > 128.
   । ᤥ ⠪ ਠ:

  1. १ ᨣ Q6  16D45.
  2. १ 14D47  2D40  १
१ 680  ᮥ  16D45.
  3. १ ᨣ AQ7  19D45 
   2D40.
  4. १ ᨣ AQ6  19D40 
   19D45.

  ᫥ ⠪ । 
設 ᮢ⨬   ⠣512 
 ௨256,     1
祬  直 ४⥫. 
࠭ 㤥 ନ஢ ⠪
ࠧ:

 Ŀ
 543210
 
        bit 0,#7ffd
       bit 1,#7ffd
      bit 2,#7ffd
     bit 6,#7ffd
    bit 7,#7ffd
   bit 4,#1ffd

  , ⮡ ᯥ  ꥬ
1 㦭 ᨣ AQ6  AQ7   D9
  ⠪ 奬:

 AQ6
 X 5D9
 AQ7                      
 X 12D9
                        
          2Ŀ4  
        ĴA0MXY0 
           3      7   
       ĴA1  Y1
 A18'       5Ĵ    
 ĴB0    
 A19'       6      
 ĴB1    
  15D47    1Ĵ    
 ĴSA    
           15__    
           ĴOE     55516
            
      
       680

  祬 ᫨  ⮢ #1ffd 
#7ffd  﫠,  奬 ⠥
⮩  ᠬ.  A18'  A19'
   DMA (A19'  6DD9),
஬ ⮣,   DMA  3DD9 㦭
 ᨣ D3.

    .. ஢  
128.   ⥬ אַ ⭮襭 
DMA  ,  쬠  
KAY.   ਠ:
  1.   樨 ⮢
㦭:
  ) ࢠ 1D40  RESET   
ࠧ  522 ( 㣮
)  ᮥ 1D40 㬡஬
   ⠪:

RESET Ĵ 1D40
                
            /   
      / 
      
᫥ ⠪ ।  #1ffd
,    7  #7ffd
⠭. ⮡   㦭:
  ) ࢠ AQ7  19D45   
ࠧ १ 680   㬡 
  ⠪:

            680 
19D45    AQ7
                 
             /   
      / 
      
 ᯮ짮  ᤢ
㬡.  ⮬ 
஢ 祭.
  2.   樨 ⮢
㦭:
  ) ࢠ 1D40  RESET   
ࠧ  522 ( 㣮
)   ᤥ  
奬

RESET Ĵ 1D40
                
            /   
      / Ĵ  14D47
                  522
               /
 +5 /   15 55516

-----------------------------------------
(c) 楢 ᥩ/Stranger
