 ZX.SPECTRUM (2:5020/78.7)  ZX.SPECTRUM 
 From : Alexander Volkov                    2:5020/168.31   Thu 11 Nov 93 23:44 
 Subj : Z80 documented & Undocumented?                                          

Hello Oleg!

 OV>  ॣ I.  -⠪ 뭨   뢠 
 OV> IM2?   嫮, ᨭ-   , ⢥ত
 OV> ᪫騥 .   I - 訩  訩  
 OV> ()? 㤠 ⮣  訩 (訩, , ⠫쭮) ?

        IMHO  ॣ R.  祬   誠,  IM2
  _⮬_  257  ⨪ ?

 OV> 2. H   ॣ R. 쪮  (7  8)     
 OV>  ६? ᫥  ? ᫥  饭 

        ᫥  横 M1 - 横 롮ન  樨

 OV> ? ᫥  横 (⠪?)    ⠪? ⨬, ᫨
 OV> 塠⮢  LD A, (1234h)  ࠧ 롨ࠥ   ᠬ 
 OV>      ,  , R:=R+3?.

        R:=R+1

 OV> H  .
 OV>   横?

        横 饭  設. 1=~4⠪, ⠫    3
        (   0ws -  "⠣" ਬ)

 OV> 7. H,  ᫥ - ࠢ
 OV> .

         

 OV> ᨬ쭮  㡨 ⢨  䨪஢?

        64

 OV> ..   ਠ樨 ⨯ mov Xh, Yl?

        ,  ᪫  ᫥

 OV>   
 OV>  ࠢ ?

          -  १    ॣ   IX(IY)+..

 OV> .. ,  .   ᯮ. ,  Z80 뢠  16-⮢,
 OV> ⨯  BC.  㤠  ⮣ ᮢ뢠   , ⨬, INIR,
 OV>  B ६?  ⢨⥫쭮, ,   I8080 த 
 OV>       設  . 
 OV>  砥,  Z80 ⢨⥫쭮  16-⮢?

         8080  out 36 뢮 A  3636
         Z80A  out (36),a 뢮 A  A*100h+36
                out (c),a  뢮 A  (BC)
          筮

 OV> , ᮢ⮢  . H   訢.

          ⢥

 ZX.SPECTRUM (2:5020/78.7)  ZX.SPECTRUM 
 From : Michael Markowsky                   2:5020/78.50    Mon 15 Nov 93 02:59 
 Subj : Re: Z80 documented & Undocumented?                                      


 OV>> 1.
 OV>> p pp I.  -⠪ 뭨 p p pp뢠
 AV> 
 OV>> IM2?   p嫮, ᨭ-   , ⢥p
 OV>> ᪫騥 .   I - p訩  訩  p
 OV>> (p)? 㤠 ⮣ p 訩 (p訩, p, ⠫쭮)
 AV> ?

 AV>         IMHO  pp R.  祬  p p誠, p IM2
 AV>   _⮬_  257  ⨪ p?

H, pp R  pp뢠  ⭮襭  .  257 
 ⠢  ᫥饩 p稭. H ZX Spectrum p ⥭ 襣 
p p pp뢠  設    #FF.  ᠬ p
pp뢠 㤥 롨p  p (I*100h)+FF. H  p 設,
 p pp㦥 設 , p 롮p 襣   設 室
 #FF. ⮬, ⮡ p p p稪 pp뢠, 
(p稪)   p, 訩  p p p訬, 
⨬ ⮬    (I*100h)+00  (I*100h)+100h ⥫쭮.
 , pp ᫨ p稪 稭  p #D9D9,   pp
I - #F8,     #F800  #F900 ⥫쭮   #D9.
, ᫨ p ⥭ 襣  p p 㤥 p⠭  XX,
 p 롨p  p (I*100h)+XX = #F8XX. A  p #F8XX 
᫮ #D9D9 -   p p p稪 pp뢠.

 ᠥ pp R -  易  pp樥 ᪮ . H
ᯥp㬥 pp 믮 奬 pp p 롮p
 . H  Z80  ᠬ ppp .  ⮣
 p p  믮  p pp  7 
 設 p  ᮤp pp R, ⨢p ᨣ /RFSH
   ᨣ /RAS  奬 ᪮
 p pp  ⮢ p, p p
⠭  設 p (7  ). p R pp ᫥
 横
1,  p ⮬  p p訩 .   ᠬ Z80, IMHO, 
pp   128*(᫮ ⮢    p 奬
᪮ ).  5  ᫮ p 256 (8 p ), 
7 - 512 (9 p ).
᫨ 設 p  pp,  p㣮 p⢮  横 BUSRQ, 
pp 室  ⠪  (WAIT),  pp pp
 믮.


 AV>         横 p饭  設. 1=~4⠪, ⠫    3
 AV>         (  p 0ws -  "⠣" pp)

E᫨ /WAIT ᨢ, :
 M1                                    - 4 ⠪
     ⥭/                  - 3
     /뢮                          - 4
     p⠢ 㯠  設         - 3
     ⢥p ᪨p㥬 pp뢠 - 6
     ⢥p NMI                     - 5
     HALT                                  - 4

( /뢮 ᮤp ᥣ 1 ⠪ , 横 ⢥p
᪨p㥬 pp뢠 - 2.  ᤥ  祭 p  譨
p⢠).


       Best wishes ! Michael.

--- WaxMail 0.05/beta
 * Origin: One point for two men. (2:5020/78.50)

 ZX.SPECTRUM (2:5020/78.7)  ZX.SPECTRUM 
 From : George Shepelev                     2:461/26        Wed 24 Nov 93 15:53 
 Subj : Z80 documented ...                                                      

        Hallo Oleg !

OV> ... , , । 㯥 Z80. H 祭 ⮩.

      ⠪ ,     ᮧ 쪮  -
"直",  ⮬ 祭 㤭 㤥 ᯮᮡ  
楫 ( ஬  ). ।   ⮬  ᨮ쭥 
 砫 ࠧࠡ     ᯮ짮 ᯥ䨪樨
 ணࠬ 樨 Z80. ᫨ ᮯ殮   㤥  -
஢ -   㦨 ஬ ணࠬ 樨  設 
 ⮣  (  ⮫쪮 ⠭    ),  -
묨 㡠 , ⠢묨   ..    ந
 ⫠  筮  ࠡ  ० ᨬ樨.  
᫥ ⮣    設  ( ୮ ⢥ ਠ -
  COM ணࠬ  IBM ).  ⠪ ࠡ  । ᢮ -
⢮ ( ᠬ  ⨬ ,   IBM 㤠 ࠡ ᨬ 
 ,    48...  ⥯ ⭮ 祬 ࠡ 
⮩ ਨ ).

       饮ࠧ⥫ ᢥ :

      ॣ I ᮤন 訩   ⠡ ஢ 뢠-
.  ० IM2  ᨣ -IORQ & -M1  奬, 맢襩 뢠,
뢠 訩   (   ⥬,    ஢
襣  ).   祭    뢠  -
  室  ணࠬ ࠡ⪨ 뢠 (  ଠ Intel :
訩  , 訩  ᫥饬 .    -
᪨  設 ᥣ  뢠 訩   = FFh. H
 ॠ쭮    ७ (  ⮬ ᫥ ଥ ) 
஢ 祭 ᨣ -RD  "뢠"  ⠪ ; ᫥⢨
⮣    祭,  ⠢ ঠ   -
 ⠡ ஢ 室  257 ,  ன 訥 
ࠢ 訬.

      R ᮤন   ( 8  ),     ⮫-
 訥 7  ( ⮣ 墠⠫  ᪠   ६ ᪨
 ).  ⠥  横 ॣ樨,  ᫥    
横 M1 ( 롮ઠ 䨪   樨 ), ⢥ত ᨣ
-MRQ & -M1 & -RD. ⮨ ⬥,     (  ⮬ ᫥
   Spectrum + ) 横 롮ન M1    ⠪ ( 
ᨭ஭樨      뢠 ). 訩  -
 "㬥" ᯮᠡ  䫠 ﭨ, ⠪   ⮦ -
 㫨஢.

       Z80   ਣ IFF1  IFF2, ᯮ㥬  
ࠡ⪨ 뢠. 祭 IFF1 ᯮ  । ⨬-
 ᪨㥬 뢠  IFF2 뢠   䫠 P/V 
LD A,I  LD A,R.   ࠡ ᫥ (   祭  
"ZX Spectrum  짮⥫  ணࠬ⮢" -  묨  -
ﬨ ) :

         IFF1  IFF2    ਬ砭

ᨣ -RESET     0     0      ⠭ ० IM0

 DI        0     0      頥 뢠

 EI        1     1      ࠧ蠥 뢠

ᨣ -INT       0     0      ᫨ ᨫ IFF1 - ࠡ⪠
                                ᪨㥬 뢠

 RETI     IFF2  IFF2      ᪨㥬
                  ?             뢠

ᨣ -NMI       0    IFF1    ᪨㥬 뢠

  RETN    IFF2  IFF2      ᪨㥬 뢠

  LD A,I  IFF1  IFF2    P/V <= IFF2
         LD A,R             

    㢥७,  IFF1 ⠭  RETI,    
ᮡ 祭 - ࠧ  ⮫쪮  ࠡ⪥ ᪨㥬 -
뢠,  ⠬ ᥣ  室 ᯮ RETN.   RETI -
砥  RET ஬  ⮫쪮 ⥬,  ᯮ 㣨 奬
ᥬ⢠ Z80  ਧ 砭 ࠡ⪨ 뢠. ᪮  -
㯭   ⠪ 稯  -    ᯮ ( -
 ⮩ RET ).

       뢠 쭮 , । 롮મ ࢮ
横 ।  ஢ ﭨ ᨣ -RESET, ⥬ 
浪 ਮ⮢ -NMI,  ᫨ ⠭ IFF1  -INT  ᮮ⢥-
饩 ॠ樥.  HALT    ,   頥
 稪   砫 室  ⮣ ﭨ ( ᨣ-
 -RESET, -NMI   ࠧ襭 뢠   -INT ).

          ࠢ    ਡ⥫쭠,  -
 . -      , 祬 ७-
 ࠧ  ᭥. 騥 ࠡ  ० ॠ쭮 ६ -
 "" ३  ᮢ६ 386 DX 33MHz ... PENTIUM OVERDRIVE 66MHz,
⮫쪮 ਤ 砫 㪠 ⥫ :)

      䫠 F ᮤন ᫥騥  :
7: S    - 
6: Z    - 
5:
4: H    - ᯮ⥫ ७
3:
2: P/V  - ⭮/९
1: N    - ⠭
0: C    - ७
  H㬥஢  ⠪  ᯮ짮  ࠭ ﭨ
  ⤥묨 ,    ᯮ짮  -
. ⮡ ࠢ쭮 ⠭   ஬ 室 ᯥ樠-
 ᫥  ⮣ ॣ    (  ⮬ ᫥ -
㬥஢ ).  㬥஢  ⠪ ᠭ ࠧ
 䫠 H  P/V  S,    ࠡ  ⠬ ࠧ 䫠-
 C, P/V, S  H.  砫 ⢥ত,  ᠭ 䫠 ਭ-
 ﭨ ᮮ⢥  ॣ A,  ਠ ...

       㬥஢  㤮 짮 ⠡栬 -
஢ 16*16 ⮪.  㡥०  ᮡ ᫥  -
  .   ⠡ 䨪 CBh ( ⮢ 樨  ᤢ )
 "ઠ"   30h...37h.   ᯮ ਠ  SLI, -
 ⫨砥  SLA ⠭ 襣  ࠭  . ᫨ -
 ६ 䨪 ᭮   ⮢ 樨  -
  ⨯: DDh,CBh,nn,36h [ SLI (IX+nn) ].
      ⠡    䨪ᠬ DDh  FDh  樨 
襩  襩  ᭮ ॣ (     :
LX, HX, LY  HY ).      ﬨ  ॣࠬ
HL,  ਬ :
          ᥬ஢     

DDh,24h        DEFB #DD        ; INC HX
               INC  H
FDh,2Dh        DEFB #FD        ; DEC LY
               DEC  L
DDh,4Ch        DEFB #DD        ; LD  C,HX
               LD   C,H
DDh,26h,nn     DEFB #DD        ; LD  HX,nn
               LD   H,nn
DDh,8Ch        DEFB #DD        ; ADC A,HX
               ADC  A,H
᭮,   ६ ࠡ  ࠧ묨 묨 ॣࠬ
[ LD HX,HY ]   楫 ॣ஬    [ LD LX,(IX+nn) ]. -
 堫  㤭   ⨯ LD LX,HX,  ᯥ樠쭮 ஢.
     ᭮ ਬ 䨪ᮢ DDh  FDh   ᤢ  /-
 , ਬ :
                         ⠭ 

DDh,CBh,nn,1Ah    ; RR  (IX+nn),D     RR  (IX+nn)
                  ;                   LD  D,(IX+nn)
FDh,CBh,nn,E0h    ; SET 4,(IY+nn),B   SET 4,(IY+nn)
                  ;                   LD  B,(IY+nn)
     ⭮,  ⠪ ⪨       ᮢ
"直 ⠬ ⮢  ६ᮢ".
        ⥫   䨪ᮬ EDh   堫,  
 ⠪ ?   砥   ᠭ  ணࠬ 樨
易 ᮮ  ⮬  ஢ 쭥襣  : - ਭ樯,
   㭨ᠫ ⨢ ணࠬ ;-)
        ।⠢,  ᫮   ( 㥬
  )   ॢ 4 ...

      ⠬  :    ⠬  Z80 砥  -
 16-ࠧ來 ᮢ.   ࠧ 8080  襬  ⠭-
 祭  , ⠫  ࠡ  ⠬ ⠢-
  ⢥   ⥪饥 ᮤন ॣ஢ BC.

        ஡:  樨  ॡ । -
⥫쭮 믮    ⠪,    ਢ쭠, -
  設 横 ਭ㤨⥫쭮  (  ࠧ 設
  ࠧ ᠬ  ᢮,   㦥 㯮   ᨬ 
⨯ 設 樨 ).    ⫠  ணࠬ,  -
 ᮢ⨬ ⭮ ॠ樨   "" ணࠬ 
⮩, "ਢ뢠饩"   ᮡ .

     ᫨ ᭮ -  த ...

