  ⪮ ᠭ ⮢  ⮢ ஫ hard drive.
(C) Slot & Co
(R) Valerij Kozhevnikov (500:95/468.2@ZXNet)

AM      -  થ
CRC, - ஫쭮-横᪨ 
HOST    - ࠢ騩 
ECC     -  㦥 訡

  ⨢  ஫  ᮤন   : ஫
  512k  ஫ HDD.  ⮩  ⪥   ஫-
 XT ,   ᮫⭮ ᨬ    뢠.

 #FCAF (out)  - ࠢ 䨣樥 ஫.

 bit 7,1
 -  訥 , ନ騥  ࠭ 뢮 
० 640*200.

 bit 0
 - (=1) 祭  䨣樨  512k.

 bit 4
 - (=1) ஢ reset-  䨣樨 ஫.

 bit 5
 - (=1) ஢   ⥭  ⮢ ஫.

 bit 6
 - (=1)  reset HDD.

 #FDAF (out) -  䨣樨 .
   ਢ  ,  䠪᪨   4 -
ᨬ 128- 設.        ᥣ-
⮢    ⠢     ࠭,   
#C000 -   32- .

 Ŀ
     ࠭   
 Ĵ
   #0000   0,8,16,24   
                       
   #4000   5,13,21,29  
                       
   #8000   2,10,18,26  
                       
   #C000          
 

    .
 ࠧ  ᪠:  㯮ॡ  묨 ⠬  ⮨.
      ⥫ ࠡ뢠 ⠭/ࠧ.
    ਡ.
        ᪫稫: ࢠ 1- ⠪ 
諥.

Ŀ
                  IN                          OUT              
͵
 #FDAF     D8-D15              not used           
 #FFAF         not used              D8-D15       
 #FEAF    D0-D7         D0-D7        
 #F6AF   訡              ।樨     
 #EEAF   稪 ᥪ஢   稪 ᥪ஢   
 #E6AF    ᥪ       ᥪ      
 #DEAF    樫      樫     
         (low)                      (low)                      
 #D6AF    樫      樫     
         (high)                     (high)                     
 #CEAF   ⥫/  ⥫/  
 #C6AF   ﭨ                         
Ĵ
 #CAAF   ୠ⨢    ࠢ ﭨ - 
        ﭨ                  ⥫                      
 #C2AF    ⥫        not used              


        #FDAF, #FEAF, #FFAF ᯮ  -
  権  ⥭/ ᥪ  ணࠬ ०
-뢮.   #FEAF 㯥,   筥 -
  ⥭   . ।  ⢫ 16 -
ࠧ來묨 ᫮.  ⥭   #FDAF 뢠 ࠧ-
 D8-D15 ॣ  HDD.   ४⭮ 뢠
।⥫쭮  室   ࠧ D0-D7 ( #FEAF)
ॣ   HDD.   ᭠砫  D8-D15  
#FFAF, ⥬ D0-D7   #FEAF.
    믮  権 ⥭/ ( 
  묨 ।  ) 4  ECC । -
,  । ।祩 ⮢ ECC ୮ ⠭  3
"Data request" ॣ ﭨ.

*    ᯮᮡ ।  ਭ - ⮣,  ࠧ
᫮  HDD IDE - 16 ,  ࠧ 設 - 8 . ⮬ -
 ᫮  ।/ਭ   IN/OUT.
  ᪮७ 権 -뢮,  ⮢ -
 ⠪ ࠧ,   ᯮ짮  INI-
/OUTI.

 ਬ, ⥭  ᫮:

        LD      HL,BUFFER
        LD      BC,#FEAF
        INI
        INI

 :

        LD      HL,BUFFER
        LD      BC,#00AF
        INC     HL
        OUTD
        OUTI

 *    #00AF  - ⮣,   OUTD/OUTI 
DEC B  뫪  .

      訡  #F6AF (in) । ﭮ HDD ᫥
믮 樨. ﭮ ⮣ ॣ ⢨⥫쭮:
 - ᫥ 믮 , ᫨ ⠭  "Error"  -
 ﭨ.
 - ᫥ 믮  "⨪"  ᫥ 믮
७ ⨪ HDD  ⥬ .

      ᪮  ०  ॣ 訡 ।
᫥饥:
    #01      訡
    #02     訡 ப஫
    #03     訡 ୮ 
    #04     訡  ECC
    #05     訡 ய
    #8x     ⮢ ஡,   ७ (HDD ࠢ).

    祭 ⮢ ॣ 訡 ᫥ 믮 :

Ŀ
   7      6      5     4     3      2     1     0   
Ĵ
   BBK   UNC     0   IDNF    0     ABRT  T0NF  AMNF 


 bit 0 - Data Adress Mark Not Found
 -  ⠭  ६ 믮  "⥭ ᥪ-
",  ᫨  થ  ᥪ   ᫥ -
쭮 宦 䨪 ⮣ ᥪ.

 bit 1 - Track 0 Not Found
 - ⠭ ⮫쪮   "४஢", ᫨ ᫥
2048 蠣  㦥 ஦ 0.

 bit 2 - Aborted Command
 -  ⠭   祭  HDD ﭨ "Write fa-
ult",  "Not  seek  complete", "Drive not ready"   뫠
㦥  ⢨⥫쭠 . 稭 訡  
।  ॣ஢ ﭨ  訡.

 bit 3 - not used (=0)

 bit 4 - ID Not Found
 - ॡ㥬 樫, , ᥪ    㦥
  ந諠 訡 ECC   䨪.

 bit 5 - not used (=0)

 bit 6 - Uncorrect Data
 -  訡  ECC   . ⠭  砥 -
४㥬 訡.

 bit 7 - Bad Mark Block
 -  䨪 㦥 ⪠ 䥪⭮ ᥪ.

     ।樨 #F6AF (out) ᯮ짮  㪠-
  樫  ண 室 믮 ।-
.  ᮢ६  ।樥 ࠢ ᠬ
⥫,  ⮬    ॣ  ᯮ짮 
㣨 楫.

     稪 ᥪ஢ #EEAF ᮤন ⢮ ᥪ-
஢     権  ⥭/.  祭  ⮣  ॣ
㬥蠥    1    ࠡ⪥  ᥪ. । 1
ᥪ ந室  祭 1,  祭 0 - 256 ᥪ-
஢.  ᫨    믮 ᥪ୮ । ந諠
訡   ⥭ । ᥪ,  । ४-
頥,   ॣ 稪 ᥪ஢ 室 - ᥪ-
஢, ஥ ⠫ ᫥ 㦥 訡.  ᯥ譮
襭  ᮤন 0.

      ᥪ #E6AF ᮤন ⮢  ᥪ-
   権 ⥭-. ᫥ ࠡ⪨  ᥪ-
 ᮤন ६. ᫥ 襭  -
ন  ᫥ ࠡ⠭ ᥪ   ᥪ-
  ஬ ந諠 訡.

     襣 #DEAF  襣 #D6AF ⮢  -
 । 樫,  ண 㤥 믮 -
 .

     ⥫/ #CEAF (in/out)  :

Ŀ
   7      6      5     4     3      2     1     0   
Ĵ
   1      0      1    DRV   HS3    HS2   HS1   HS0  


 bit 0-3 -   ࠭ 
 bit 4   - 롮 HDD,  0 - ⥫ 0
                       1 - ⥫ 1
 bit 5,6 - ࠧ ᥪ:
    00    १
    01    १
    10    512 /ᥪ.
    11    १

bit 7   - १

      ﭨ #C6AF (in) ⮡ࠦ ⥪饥 ﭨ
HDD. 祭 ⮣ ॣ  ᫥ 믮 -
  . ᫨ ⠭  BSY ⮣ ॣ,  
饭    HDD  饭,    祭 ⠫ ⮢ -
⢨⥫.  ⥭  ⮣  ॣ  뢠 ⭮
뢠 IRQ14 (  奬  뢠  ᯮ-
).
    祭 ⮢:

Ŀ
   7      6      5     4     3      2     1     0   
Ĵ
  BSY   DRDY    WFT   DSC   DRQ    CORR  INX   ERR  


 bit 0 - Error
 - ,  ।  稫  訡, 
    ᪮쪮  ⮢ ⠭  ॣ 訡. -
   ன ஢ન ᯥ譮 襭 .
뢠,   ॣ  뫠  .

 bit 1 - Index
 -  ⠭    1      . 
ᮢ६   ᯮ.

 bit 2 - Corrected Data
 - ,   ⥭  ந諠 訡, 
뫠  ᯥ譮  ᪮४஢ ன . ४㥬
訡  ४ ᥪ ।.

 bit 3 - Data Request
 -    뢠,      묨 
஬  ᥪ  믮  ⥭-.  ⮬
  室 /   ,  -
ᨬ  믮塞 .

 bit 4 - Drive Seek Complete
 - ,   訫  ᪠.

 bit 5 - Write Fault
 -    ࠢ  ⥫,   ᯮ-
  ""  ४묨 ࠬࠬ.

 bit 6 - Drive Ready
 -  ⠭  1 砥 ⮢ HDD  믮 -
.

 bit 7 - Busy
 -  । ﭨ HDD. ⠭  1  믮-
      ⨪  ᫥ ⥬ . 
  ⠭,  㣨  ॣ ﭨ 
  ⢨⥫묨.  Busy   ஢७ ।
⥭  ॣ ﭨ.

        #C6AF (out) ᯮ  㧪 -
塞  .  ।   室 -
  䠩   - Task File ( 室  
  #EEAF, #E6AF, #DEAF, #D6AF, #CEAF),  HDD 室
  ﭨ " " (Busy = 0). 믮  稭-
 ,     ॣ .

      ୠ⨢ ﭨ #CAAF (in) ᮤন -
   ଠ,   ᭮. 稥  ⮬,  ⥭
ୠ⨢  ॣ  뢠 ⠭ 뢠-
 IRQ14. (  奬 IRQ14  ᯮ).

     ࠢ ﭨ #CAAF (out) ᮤন  -
ࠢ :

Ŀ
   7      6      5     4     3      2     1     0   
Ĵ
                           HS3EN   SRST  /IEN       


 bit 1 - Interrupt Enable
 -  ࠧ襭 뢠  HDD  HOST.    -
⨢    ⥫  ࠭,  HOST 뢠.   HOST
IRQ14     ࠧ襭 १ ⠡ . 
   ⨢  HDD  ࠭, ᨣ HOST IRQ14 㤥
  ᮪  ஢. (  奬  뢠  -
).

 bit 2 - Soft Reset
 -  ணࠬ .   HDD    ⠭
 1  ⥬   0.

 bit 3 - Heads 3 Enable
 - ᯮ  ࠧ襭 롮   8  15.

        ⥫ #C2AF (in) ᮤন  -
  ⥫, ࠭ ।饩 .

Ŀ
   7      6      5     4     3     2     1     0   
Ĵ
        /WTG   /HS3   /HS2  /HS1  /HS0  /DS1  /DS0 


 bit 0,1 - Drive Select
 -  롮 ᮮ⢥饣 ⥫ 0  1.

 bit 2,3,4,5 - Head Select
 -   ࠭ .

 bit  6 - Write Gate
 -  믮 , ⨢  ६ 樨 .

*end of text*

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