..PGNO89 
..HEAD01A-##- 
           砥,   横᪮ ᤢ , 
 , ᮤন  0 ६頥   1,  1
-    2  ..,  ᮤন  7 ६頥    0
      ७.  ࠢ     RLA, ᠭ
,   7 ६頥   ७,   ७ -
  0. 

                     

           ᭮   ⨯ 横᪨ ᤢ :
᪨  ᤢ    ॣ஢ (横᪨ ᤢ 
㣮  - "㣮" 砥,  横 墠뢠 ⮫쪮 8
⮢,        RLC, ᠭ ) -  9-⮢
ᤢ ,     RL A. 

  RL  A        - "横᪨ ᤢ  ⥫"; 
  RL  R        - "横᪨ ᤢ  ॣ R". 
  RLC A        - 横᪨ ᤢ  㣮 ॣ A
  RLC R        - 横᪨ ᤢ  㣮 ॣ R
  RLC (HL)     - 横᪨ ᤢ  㣮 (HL)
  RLC (IX + ) - 横᪨ ᤢ  㣮 (IX + )
  RLC (IY + ) - 横᪨ ᤢ  㣮 (IY + )

                横᪮ ᤢ 
      ᤢ  ,     ࠡ뢠
⮫쪮 ॣ A. 

                  SL A - ᤢ ⥫ 

         ⫨稥  ⮩   ⮨  ⮬,  ᮤন
  ७  ,    㫥    㫥.
-,    ᢮    㬭  A   2, ᪮
祣   ⥫  ७. 㬠 ࠡ 
SL A  砥 A =80H. 

                    

             ᭮ ० 横᪮ ᤢ,
      ࠧ  ࠢ.  饭 ࠢ 墠뢠  
  ⨬  祥   饭,   饭
. 

 RR  A        - 横᪨ ᤢ ⥫ ࠢ
 RR  R        - 横᪨ 먣 ॣ ࠢ
 RRC A        - 横᪨ ᤢ ࠢ 㣮 ॣ A
 RRC R        - 横᪨ ᤢ ࠢ 㣮 ॣ R
 RRC (HL)     - 横᪨ ᤢ ࠢ 㣮 (HL)
 RRC (IX + ) - 横᪨ ᤢ ࠢ 㣮 (IX + )
 RRC (IY + ) - 横᪨ ᤢ ࠢ 㣮 (IY + )

          ᤢ ࠢ,  ᤢ . 

      SRL R - ᪨ ᤢ ࠢ ॣ R

             砥,   ⮥   2, ᫨ 
ᯮ㥬  ᫠    (..  ᥫ,  
⨬ ।⠢, ⠢ 0 - 255). 
         ᪮         ਪ     
ਬ塞  ᮣ襭    ⮬,     ⥫
ᥫ    7 ⠭ ࠢ 1 (   
  -128    +127),    ⥫쭠   ᤢ
ࠢ. 

      SRA R - 䬥᪨ ᤢ ࠢ ॣ R

           ,  ⮦   2,   ࠭
 . 

                                

               뢮  -   ᠬ  
ணࠬ஢    設  몥.    樨,
    室    ଠ  譥 ,
ਬ,         ⭮  䮭.  
ᠥ  ,         ᮢ襭 㦤 ,  
  ய ,      砥.
  襥,       ᤥ -    
 ⠢ .       , 
ࠡ⠥  䮭. ,   㦭  - 
      ⠢ ᢮ ⮢   ⭮
䮭.    Z80    롮   256 ३,  ॠ쭮
᫮,  㯭  ⭮  ,  -  १ 襭,
ਭ    ந⥫ﬨ    .        ᠥ
"",  ⮫쪮 ,饥 ன⢮ 
  䮭.  ,  祬    , 
 । . ,   ᠥ,  ,  
     뢮  砥 8-⮢ .  
   䮭   ᯮ         FEH
(筮  254),  ⠪   祭   
 ਬ  

                         IN  A,(FE) 

               ᥡ ,  40 
     ࣠  ⠪,      ।⠢
8-⮢묨 ⠬. 
         ⢥      㤥,  ᪮॥ ᥣ,  -
      ࠧ  ।  ଠ  ⮫쪮   5
.  砭  ॣ  A  ।    
,    㯯    5    㤥  ᬠਢ.
  ࠧ    4 鸞,    ᮤন
   5 . 

    3 =>   1   2   3   4   5     6   7   8   9   0   <= 4
    2 =>   Q   W   E   R   T     Y   U   I   O   P   <= 5
    1 =>   A   S   D   F   G     H   J   K   L  N/L  <= 6
    0 =>  SFT  Z   X   C   V     B   N   M   .  SPC

           ,      8      ,
⮬,    易     8 ⠬ ॣ A.  
ॣ   A   ⠭       "祭"  
᪫祭  , 饣 騩 ⥭ . 
  ।⠢  ᥡ  ᥪ -㪮⨥.
      ଠ樥, 㪮⨥ ।,
  ଠ樨  . 
         ⮡     "1 2 3 4 5", 
 몫祭  3 ॣ A: 

                  A = 1 1 1 1  0 1 1 1 = F7

         ন   ᫠        ଠ樨
㯠  ॣ A,   訥 : 

                "1" ->  0 ॣ A
                "2" ->  1 ॣ A

              ,    ଠ  㯠  
ॣ  A ᭠砫  譨 ஭ , ⠪   "0"
 "1"    0 ॣ A. 
                 
뢠    孨  ,  祬     
    (  ,  ॡ   ⥭
    ࠧ).  ⮣ 쭮 뢠, ⮡
 뤠  ࠧ  樨 ଠ樨: 

                  A = 1 1 1 0   0 1 1 1 = E7

          ,    "3"  "4" 몫祭.
 㪮⨥  쭮,   㦭 ଠ
    3    4,        . 筮, 
樨  ଠ樨  뢠  ६蠭묨, ⠪   
ᬮ  ᪠,  뫠   "0"  "1", ਬ,
 ⠭  0 ॣ A: 

             "1"    "0"  ->   0 ॣ A
             "2"    "9"  ->   1 ॣ A

                  ᪨   ,  ᪮
 ᯮ짮  "5"  "8"  ⢥ 㪠⥫
ࠢ  ࠢ  ,    室 
ࠧ  . 
          ,  ᫨  ਬ  

                          IN R,(C),

  ॣ  C  ᯮ㥬  ,  ᮤন
ॣ  B  ।,       롨ࠥ.
㣨   ,  ।⠢騥      ,  -  
-뢮    ⭮  䮭.     FE, 
᪠   .   ᭮    ஡  易  
ᨭ஭樥      뢮 . ஡ ⠪ ⨯
ॡ  讣   ணࠬ஢  設 몥 
᫥ ६ 믮  . 
           OUT  ⠪  ਬ    ஢
㪮   ᨣ      ""    ⠭  梥
.          ࠭     㪮⢠    ""
ᬠਢ        OUT      몥   "ᨪ",   
ணࠬ஢     設 몥  筮 ⠪
.  묨 ᫮,  0, 1  2 । 梥 ,
  3 뫠    MIC  EAR,   4 뫠
    ७ ஬⥫. ⮡  梥
,  㦭  㧨    ॣ  A  ᮮ⢥饥
祭   梥,    ⥬  믮    OUT  (FE),A.
   ,         TEMPORARY  (६)
  梥  .  ⮡  ﭭ  梥
,    믮 ਢ   OUT
   ⠪         祭   祩      23624,
।⠢ ᮡ ६ BORDCR 樮 ⥬. 
         稭   ⮣   ⮨     ⮬,    
"" (稯 ULA "") ࠢ 梥⮬  
  砥  ଠ  , ᬠਢ ᮤন ⮩
祩  .    ।   뭪  
梥⮬  ⮫쪮 ஢  뢠 (
DI).    ,      ணࠬ  
ࠧ 뢠 ( EI). 

            

             ᣥ஢  ᢮ ᮡ⢥ 㪮
ᨣ    "",    짮⥫,  ⮫쪮
16      ந  㯮    ।
࠭祭, ஦ ᮡﬨ . 
         ᪮  ࠭  ﭭ  , 
ॣ୮  뢠  믮   Z80  ⮣, ⮡
,    室    䠩  ᯫ.  믮
⥬   ᭨   殮    奬  WAIT.    १
뢠      ᮧ          뫮
ணࠬ,  ॡ饩  筮    ॣ୮ ᨭ஭樨,
᪮    ।᪠ १ ᨭ஭樨 
   뢠 WAIT.  "" ⠪,
  뢠  Z80  ⢫    ⪥  ࠡ⪨
ଠ樨,  ᮤঠ饩    16   ந
㯮.    뢠  ந室, ᫨ ணࠬ 
,    ⢫  Z80, 室  
 孨 32 . 
             ନ,  饭,
  ᫥騬  ࠧ:     ந 㪨 
        OUT    16 ,   
   .      ணࠬ BEEP
  .(.      ।⢠  "").  樨
㪠            ᫠          祭
஬⥫   (/      MIC,  ᫨    㦭
ᨫ).  ⥬,  ஥ ६,  㦭 ᫠
㣮          몫祭.  ⥬,    
஥ ६,    ...... 
          ࠧ ᮧ . ࢠ ६ 
    ᫥⥫묨    祭ﬨ    ஬⥫
।      㪠,   த⥫쭮   ࢠ
६,      祭   ண  ஬⥫  ⠥
祭,     ⨢  ࢠ  ६  
ᠬ,          ⥯  ஫
஬ 㪠. 
           ,        ਬ  
祭      몫祭   ⠪  祭  A,  ⮡  梥
      .    ⨢  砥  ⭠
ࠪ⨪   祭  㪠  㤥    㪨
㧪. 

                          

           ணࠬ,    ७ ᪮ன
  (  ⠥,    ⥬  ᭨), 
,     ᯥ 砭   
祭  ண  ⪮  ࢠ ६, ० 祬
३  ᫥饩 . 

      -  

         筮-஢   ।⠢     ᪨
᮪頥    BCD  (BINARY-CODED  DECIMAL).     
ᯮᮡ ।⠢ ଠ樨  筮 ଥ. 
         ⮡   ஢          0    9
室  ᥣ  4  .     ஢
  .    뢠  筮-஢ 
।⠢. 
         ਬ: 
 0000  0000 - 筮-஢ 筮 ।- ⠢
筮 ᫠ 00. 
 1001  1001 - 筮-஢ 筮 ।- ⠢
筮 ᫠ 99. 
            㤥   筮-஢  ।⠢
ᥫ     58,10?    㤥        1010    0000    ⨬
筮-஢  ।⠢ ᫠? 

         -
                      

           ࠭  ⥬ 祭  ।⠢
ᥫ     ⥭樠 ஡  ᫮ 
⠭. ஡㥬 ᫮ ᫥騥 ᫠: 

                    BCD     08  0000 1000
                    BCD     03  0000 0011
                    ----------------------
                    BCD     11  0000 1011

          ,  १ ன 樨 ७ 
  ⨬   ।⠢ 筮-஢
筮 ᫠.  樨  㤭⥩ 室
ਬ   ᮡ      DAA,   뢠  "筠
ன 䬥᪨ ⢨", ⮡ ࠢ १
᫮ (..  6, ᫨ १ ॢ蠥 9). 
           㤭        ਬ.
㤥   ஢     ७    襣  ࠧ鸞
筮-஢-   筮 ᫠ (ᠬ ࢮ) 
ᠬ  .    ७  ७    ⥭ 
  ன ࠧ 筮-஢ 筮. 
              ⮣  ७  ᯮ  䫠
 ७ H. 

         LD A,12H      : LOAD LITERAL BCD "12"
        ADD A,24H      : ADD LITERAL BCD "24"
        DAA            : DECIMAL ADJUST RESULT
         LD (ADDR),A   : STORE RESULT

LOAD LITERAL - 㧨 ࠫ;
ADD LITERAL -  ࠫ; 
DECIMAL ADJUST RESULT - 筠 ன १;
STORE RESULT -  १.

            ணࠬ஢          ॡ
筮-஢  筮  ।⠢.    
,   稯 Z80 -⠪ ন  ।⠢ 
  DAA  砥   让 㯯 짮⥫
筮-஢ - 筮 ।⠢. 

                          

         뢠  -  뫠 ய ᨣ,
           ६    ਮ⠭
믮  ⥪饩  ணࠬ  (ணࠬ    㧭 
⮬). 
         Z80   ।⠢      堭  ⢫
뢠:    設  (BUSRG),  ᪨㥬 뢠
(NMI)  筮 뢠 (INT). 
           DI  (஢ 뢠) ਬ 
   (᪨஢),         EI  (ࠧ஢
뢠) -  ⠭ (ࠧ᪨஢). 
           饬  砥 筮 뢠 ਢ  ⮬,
 ⥪騩 稪  㤥 饭  ⥪,  ࠢ
   RST 㤥 ।  㫥 ࠭ .
 饭  뢠 ॡ  RETI (
 뢠). 
          ଠ쭮 ० ࠡ  "" 뢠
ࠧ஢ (EI),   ᠬ  ணࠬ 뢠 50
ࠧ     ᥪ㭤.    뢠    ணࠬ  
⢫ ᪠஢ . 
               ஢ 뢠 
襩   ணࠬ,  ᪮    ᪮  믮.  
-⠪ ᬮ  ଠ    ᫮
ᯮ짮   ᢮   ᮡ⢥   ணࠬ     ⮣.
易⥫쭮   ࠧ   뢠,      
믮  ணࠬ,  ᪮    ⥬    ᬮ
 ଠ  . 

                      (RST)

             ᪮॥    ᥣ    "㤨"   稯   8080,
ॠ    楫  ᮢ⨬.  ⮬     
⠭  ਬ  RST  ᢮ ணࠬ.  RST
믮      ᠬ  ⢨,   맮,  
ᮢ  室  ⮫쪮  쬨 ᠬ, ᯮ 
   256   祩  :  00H,  08H,  10H,  18H,  20H,
28H,30H,38H. 
         २⢮    RST  ⮨  ⮬,  
ᯮ㥬  ணࠬ    맢, 稢  
ᥣ    .  ஬  ⮣,   RST  
६, 祬  CALL. 
         ⪮    RST   ,   
ਬ  ⮫쪮  饭    쬨 ਢ
 ⨬ 祥. ᪮   祩 ᯮ 
,      ᯮ짮  ⨬ २⢮  ᢮
ᮡ⢥ ணࠬ. , ,  ᯮ짮
ணࠬ  ,  ᫨    ,      , ⥬
ᠬ, ᯮ짮  RST. 
           ᬮ    㧭    RST  襩
 "UNDERSTANDING YOUR SPECTRUM", ᠭ ஬ 
. 

                       "       M"

             

         ணࠬ஢       設   몥   
१砩   ⮬ ᫥,    
,  㣮. 
         ᪮      몮   ᮪ ஢ 
筮    㦭 室  設 , , 
   ணࠬ஢  몥 "࠭",  "",
  㣮,  ணࠬ஢  設 몥. 
         ⥫ २⢮ 㤥 ,  ணࠬ
 設 몥 믮 ॥. 
           ᮫⭠    ,  , 
誮    ஦  ணࠬ.  稨 ⠪
  ᢮      ,  㣮.  ⫨稥 
樮 ⥬ ""  몠 "ᨪ", ਬ,
 ஢ન ।  ⨬. 
         ᪮     ᫠  
⮣      ⨯,  稯  Z80  㤥  ࠡ뢠  
ᢥ. 
                        ஡  ஢ન
⨬ ᨭ⠪, 㦭 ⬥,  ணࠬ஢
  設 몥  뢠 ࠭祭  ᯮ㥬
  .     믮 㭪樨, 室  ..,
    ᮫⭮  ⨬      몥 
᮪   ஢.   ⮬  ஬  祭  ਮ⠥
ᠬ樯    ࠧࠡ⪥  ணࠬ   設 몥.
   㢥  祭  楯樨  "室饣"
室    ணࠬ஢    楫,    ᮡ 
ᠥ ணࠬ஢  設 몥. 
         "室騩  室  ⠢  ࠧ 
         ஢  襩
ࠧࠡ⪨,    殮    ६  뢠 
 ப ⥪ ணࠬ. 
         ।,      ⥫    ணࠬ
ᠤ    .         
: 

         INSTR  뤠   ࠭ 権; 室  
                INSTR,   㤥  -  ENTER; 
         DRAW   ᮢ    ,        
                ᪠   設 ࠭; 
         LAND    ᪠    ᫨  祥
                稫,  ३  CRASH ३  
                LAND, ᫨ 孮  - ⨣; 
         GROUND   ࠢ   ३    
                INSTR  ᫥饣 ண CRASH 
                ᮡ      㤠筮 ᠤ
                ३         INSTR    ᫥饣
                ண. 
           ,    "ணࠬ" ᠭ
  ᪮  몥.    ⮬  ⠯    ਭ 
襭, 㤥  ணࠬ   몥 "ᨪ"  
設 몥.  襭   㦭 ਭ. 楯
ணࠬ  ᠤ         ᯮᮡ  
⥪. 
          㯠 ⠯ ᪮ ஢ન. 
            믮   ஫        ᬮ,    
,    ⥫   ணࠬ, 
  稨.      室  ꥪ,   ⥫
,  뫨?   ?    ணࠬ?
 ᫥   ꥪ ७  ணࠬ? 
          ᭮ ᬮਬ  "ணࠬ" - --! -
 뫨 -  ணࠬ. 
         ᠭ          ४᭮ 
 ਪ , ⠪  ஢ ,   ᢮
ணࠬ      ਩   ,    
 몫 ࠡ ணࠬ. 
                  ᫥     ணࠬ
᫥騬 ࠧ: 

         GROUND   ࠢ  ३    
                INSTR  ᫥饣 ண 
         CRASH   ᮡ   㤠筮
                ᠤ 
         FINISH  ப, 㦭   ᫨ ,
                ३  INSTR ᫨ , STOP 

           ,      ᯮ짮 ⪨ 
ᠭ  ।  ப ணࠬ. ⪨ - 祭 業
,  ᮡ  ᫨    㤥  롨   ⪨ 
ᮤঠ⥫묨. 
             ஢  祭,   ६頥 
஢  㡦, ⮡ த   ᠬ    ப
 㫥, ਢ . 
          ⮬  室 뢠 室騬. 
         ਬ,       ᫥騬  ࠧ  ᯨ
 "FINISH", ਢ . 

         FINISH  - ࠭
                 -:"  ?"
                 -    ⢥
                 -᫨ ⢥ =,  
                 -३  INSTR

            २⢮ 室饣 室 ⮨ 
⮬,     ஢  믮  
⮭,⠪         㤥   ⫠    祭  
⥫ ⥪ ணࠬ. 
          ⨬    ஢  ᬮਬ 
ப " ࠭"  ஡. 
           ⮬  ⠯    㦭 ,  몥 
㤥    ணࠬ,      롥६  設 
"". ᫨   ᠫ ணࠬ  몥 "ᨪ", 
 뫮  筮 : 

                           900 CLS,

  設 몥  ⮥ । " ࠭"
  稢. 
         ⮬    ᤥ -  ⠪ த: 

     CLEAR  - 砫 ࠭
            - ᫥騥 6144 樨 ஡ 

              ᠫ  窨 ⥪ ணࠬ,
,  祢,  室  ᭮    設  몥. 
ᬮਬ    ⠫쭮,     ணࠬ
⪨ ࠭      ᠬ . 
                㪮⢠  "",
  ࠭  ⮨    6144 祥     768 祥,
뢠 ਡ ࠭: 梥 㬠, 梥 ୨  .. 
         ਢ      ⪮   ᠭ   ணࠬ,
筮,     ࠭,      䠩
ਡ⮢.  ᫨        権  ࠭ ᮢ 梥
㬠    ᫨  樨      祭
ਡ      મ,    ᭠ ணࠬ ⪨
࠭, ਢ ,   ⭮. 
           ਤ  ⠪  ࠡ    䠩 ਡ⮢.
    ᪮쪮  ᫮  뢠 
  設 몥, 祬  몥 "ᨪ". 
         ⮬      ணࠬ  ᫥饣
: 
         -  砫 ࠭
         -  ᫥騥 6144  ஡
         -  砫 䠩 ਡ⮢
         -      ᫥騥   768   ⮢  ॡ㥬묨
           祭ﬨ ਡ⮢ 㬠 (୨,...) 
         騩  騩  ஢  -    㦥 , 
஬    , ,  ⥪ ணࠬ.  
 ᬮਬ,  ࠭  ஡. 

  CLEAR     LD HL,SCREEN     : SCREEN START
            LD BC,6144       : BYTES TO CLEAR
            LD D,0           : D = BLANK
  LOOP      LD (HL),D        : FILL BLANK
           INC HL            : NEXT POSITION
           DEC BC            : REDUCE COUNT
            LD A,B
            OR C             : TEST IF BC =0
            JR NZ,LOOP       : AGAIN IF NOT END

SCREEN  START  - 砫 ࠭; 
BYTES TO CLEAR - 頥 ;
BLANK -஡; 
FILL BLANK -  ஡; 
NEXT POSITION - ᫥ ; 
REDUCE COUNT - 㬥襭 稪; 
TEST -஢ઠ; 
AGAIN IF NOT END - ७, ᫨  ⨣ . 

               筮      ࠡ  
ணࠬ  ⠪    ⠪ ᯮᮡ ந 筮
訥  ணࠬ. ,  ⥯  ᮬ ,
祬 ணࠬ  設 몥  ⠪   ꥬ
 祬  ५ ணࠬ  몠 ᮪ ஢. 

                          

         ⮡        ணࠬ,  
ᥣ      ᯮᮡ,  ⠪    ᬮਬ
  ணࠬ ⪨ ࠭, ᠭ .  ⮣
 ᪮쪮 ࠧ ᯮᮡ. 

                          1

              ਤ㬠 ᯮᮡ, 騩  横
஡  6144 権  ਬ ॣ BC,  ⮫쪮
    ॣ  B  ⠪,  ⮡      짮
 DJNZ? 

                          2

                  ਤ㬠   ᯮᮡ,   騩
஡  6144 権    魮  LDIR?
⥫쭮  த㬠,        LDIR:  ᥣ
室  -  6144 ஡ 権. 

                            

            ᪮쪮  ࠢ  ⢥⮢.  ⢥
஢ઠ  -  㤥    ࠡ? 묨 ᫮,  
ணࠬ ,   㦭?   DJNZ: 

         CLEAR     LD HL,SCREEN
                   LD A,0
                   LD B,24        : SET B=24
         BIGLOOP   PUSH BC        : SAVE VALUE
                   LD B,A         : SET B= 256
         LITLOOP   LD (HL),A
                   INC HL         : FILL IN 256 BLANKS
                   DJNZ LITLOOP
                   POP BC         : GET BACK VALUE OF B
                   DJNZ BIGLOOP   : DO IT UNTIL END

SET - ⠭; 
SAVE VALUE -  祭; 
FILL  IN  256
BLANKS -  256 ஡; 
GET BACK VALUE OF B -   祭 B; 
DO IT UNTIL END - 믮  ⨦ . 

           ᬮ  ᯮ짮  24 ࠧ  256 (=6144) 
⪨ ࠭. 㦭 ⬥ ᫥饥: 
    B=0, ⮡ ன 横 DJNZ 256 ࠧ. 祬?
  楤  筮  㤥 ਬ  ணࠬ, ᫨
 ⮫쪮  ⠭ ᯮ짮 ॣ C  㣨 楫. 

      ਬ LDIR.
         CLEAR   LD HL,SCREEN     : SOURCE
                 PUSH HL
                 POP DE
                 INC DE           : DEST = HL + 1
                 LD BC,6144       : HOW MANY
                 LD (HL),0        : LAT POS = 0
                 LDIR             : MOVE IT

SOURCE - 筨; 
HOW - ᪮쪮; 
LAT - ࢠ;  
MOVE - ६饭

 ,   稫 DE = HL + 1,  DE=HL
    饭  DE.     ᤥ , 㦠
祭  SCREEN  +  1    DE  ।⢥,    ⮣
ॡ        .  稭,    ன 
  LDIR  ࠡ뢠,  ⮨  ⮬,  ᯨ
䠪,        ࠡ⪨   १뢠 
.  ந室 ਬ  ⥫ १⮬
, ᬮ७     ६饭 . 
         ᫨  㬬஢ ॡ ,   ࢮ
⮤  ॡ  14  ⮢,   ஬ - 16 ⮢,  
᫥ - 13 ⮢. 

                    "Z X          "

         ⠫   ६   ᬮ  ।⢠  襣  "ZX
",      ࠧࠡ⪥      ணࠬ 
設 몥. 

                       - 

          ᠥ  ଠ樨  "",  㤥
஢   ⭮ 䮭  ᪮業㥬
 . 
            -   ⢥  筨  ଠ樨,
।⠢騩    ॠ쭮 ⠡ ६.  
᪨        믮    ணࠬ,  
樮  ⥬  , ⠪  짮⥫᪮ ணࠬ
        ந  㯮.  ᪨    
ᬠਢ      嬥    ᥬ
鸞      ⮫栬,   ਫ .   40
祭  ।⠢    .   ଠ쭮
ﭨ   (      )    ᥣ    襬
஥  ,  .. 祭 ⠭ ࠢ 1. 
⨨    ⭮        "⮥"    祭,
ᮮ⢥饥   ⮩   ,  㤥  襭    宥
஥,  ..  0.        ன  ⮩
७   楩   ।⠢,         뢥
᪨  ᯮᮡ  ஢ન    ,  
ਬ  ணࠬ஢  設 몥. 
           몥  "ᨪ"    ᪠஢  
㦭     ⮩ ⭮  鸞 ,
  ᯮ  㦭  ,  ० 祬 ᯮ짮
㭪 IN. 
          ࠧ  ணࠬ  設 몥 
   㧨    ⥫  祭,  ᮮ⢥饥
 鸞 ,   ⨬ ஢. ॡ㥬
祭       鸞 ਢ  ᠬ 
 ⠡  ਫ . 
         ਬ,   "H - ENTER" (鸞)  㦠 
ॣ A 祭 

                           LD A,BFH

⥬  祭  A  㤥  ᯮ짮    ᪠ ,
ᮤঠ饣  ﭨ  ⮩ ⭮  鸞  
  A    INPUT. 
         ਬ, ᯮ  FEH 

                          IN A,(FEH)

         ᪮     鸞   , 
  ⮫쪮    ⮢ , 頥 
ॣ  A.  ᫨  ⮩  鸞   
 뫨,  祭   ⮢ : 

(2^4 + 2^3 + 2^2 + 2^1 + 2^0 .. 16 + 8 + 4 + 2 + 1 = 31).

          A = XXX11111,    . 
         ᫨   ⨬ ஢,   ᠬ  ,
    ஢塞,  襭  .   ᯮᮡ ஢
. 
   1.   ஢ન , ਬ, BIT 0,A. ᫨
 襭 ( ⠭),  㤥 ⠭ 䫠 . 
   2.   ᪮  (AND 1). ᫨  襭
( ⠭),  १ 㤥 㫥  䫠  㤥
⠭. 
            ᯮᮡ  ,  ᪮    ,
騩   ஢થ,   㪠   ।⢥    
஢ન  .    ⮪    ⮬,   ᫨  㦭
஢        ⮩    鸞, ਤ
ਬ       ஢ન  ,  ,  ,  
⭮⥫ 室. 
         ਬ,  ⮡  ஢    0    1  
ࢮ ᯮᮡ 

        BIT 0,A         : TEST BIT 0 OF A SET OR NOT
         JR Z,NPRESS    : JUMP IF NOT PRESSED
        BIT 1,A         : TEST BIT 1 OF A SET OR NOT
         JR Z,NPRESS    : JUMP IF NOT PRESSED
                        .
               DO WHATEVER IF BOTH ARE PRESSED
                        .
                         NPRESS   . 

TEST  BIT 0 OF SET OR NOT - ஢, ⠭   
0 ॣ A; 
JUMP IF NOT PRESSED - 室, ᫨  ;  
TEST
BIT  1  OF  SET  OR  NOT  - ஢, ⠭   
ॣ A;  
DO  WHATEVER  IF BOTH ARE PRESSED -믮 ,  ᫥,
᫨   . 

         ன  ᯮᮡ  ஢ન      ᪮  
ॡ  ᪮쪮   ᪨ ७.  ஢ન
  0  ᯮ㥬 AND 1,  ஢ન  1 - AND 2, 
஢ન  2 - AND 4  .. 
          ஢ન    ਬ塞 AND X,  X -
㬬  祭, ᯮ㥬  ஢ન    
⤥쭮.  ਬ,  ⮡  ஢,    0   1
ॣ A ⠭: 

  AND 1         : TEST BOTH BIT 0 AND BIT  1  IS SET     *
   CP 1         : TEST IF BOTH SET                      **
   JK NZ,NBOTH  : JUMP IF NOT BOTH PRESSED             ***

*     ஢,    ⠭;
**    ⠭ ;
***   室, ᫨    .

         ⮡  ஢,  ⠭   ⮢ 0 
1 ॣ A. 

   AND 3          : TEST EATHER BIT 0 AND BIT 1 IS SET    *
    JR Z,NOTONE   : JUMP IF NOT ONE IS PRESSED           **

*    ஢,    ⮢ 0  1 ⠭;
**  室, ᫨     .

                          

         ⮡      ⮣   ᥬ,      㧭  
,  ஡  ணࠬ஢   設 몥
ணࠬ    襣 "㬠", 믮 뢠 
  "ENTER".  : 
      )  ஢    鸞,    㦭 㧨 
ॣ A; 
      ) ᫠   室  FEH; 
      ) ஢ , ⠭ 襩 "ENTER". 

            -     

         ᯫ   ⥫ ࠭ - ᭮ ।⢮
뢮    饭  짮⥫. 
         ਢ      ணࠬ      設  몥
뢠  ࣠樨  ࠭  "". 

210040  LD HL,4000H   : LOAD HL WITH START OF DISPLAY FILE  *
36FF    LD (HL),FFH   : FILL THAT SCREEN LOCATION          **
110140  LD DE,4001H   : LOAD DE WITH BYTE IN DISPLAY      ***
010100  LD BC,1       : BC CONTAINS NUMBER OF BYTES TO BE
                      : TRANSFERRED                      ****
EDB0    LDIR          : MOVE A BLOCK LENGTH BC FROM (HL)
                      : TO (DE)                         *****
C9      RET           : END OF PROGRAM                 ******

*      㧨  HL 砫 䠩 ᯫ;
**       祩 ࠭;
***    㧨  DE ᫥騩  ᯫ;
****    BC ᮤন ᫮ । ⮢;
*****  ६   BC  (HL)  (DE);
******  ணࠬ. 
