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Text File  |  1998-10-24  |  6KB  |  90 lines
  1. DESKTOP ⑧x1k1                                חללללללללללללללללל†
  2.                                 ´      WD1772     ´
  3.                                 ´ bit assignments ´
  4.                                 זללללללללללללללללל¶
  5.                                  Western Digital 1772
  6.               םגגגגגגגגגגגגגגגגג™
  7.               ø Status Register ø  b0=busy
  8.               ø                 ø  b1=index pulse/data requested (type I/II-III)
  9.               ø                 ø  b2=track 0    /lost data      (type I/II-III)
  10.               ø                 ø  b3=cyclic redundancy checksum error
  11.               ø                 ø  b4=record not found
  12.               ø                 ø  b5=spin up/DAM type ($FB/$F8 for read sector)
  13.               ø                 ø  b6=write protected
  14.               ø                 ø  b7=motor on (~10 index pulses after command)
  15.               ijגגגגגגגגגגגגגגגגגך
  16.              םגגגגגגגגגגגגגגגגגג™חלללללללללללללללילללללללללללללללללילללל†
  17.              ø Command Register ø´      bit      ´    command      ´type´
  18.              ø                  ø´7 6 5 4 3 2 1 0´                 ´    ´
  19.              ø                  øכלעלעלעלעלעלעלעלמלללללללללללללללללמלללל¨
  20.              ø                  ø´0ø0ø0ø0øhøvø1ø1´ restore         ´  I ´
  21.              ø                  øוגדגדגדגדגדגדגדגתגגגגגגגגגגגגגגגגגתגגגגÀ
  22.              ø                  ø´0ø0ø0ø1øhøvø1ø1´ seek            ´  I ´
  23.              ø                  øוגדגדגדגדגדגדגדגתגגגגגגגגגגגגגגגגגתגגגגÀ
  24.              ø                  ø´0ø0ø1øuøhøvø1ø1´ step            ´  I ´
  25.              ø                  øוגדגדגדגדגדגדגדגתגגגגגגגגגגגגגגגגגתגגגגÀ
  26.              ø                  ø´0ø1ø0øuøhøvø1ø1´ step in         ´  I ´
  27.              ø                  øוגדגדגדגדגדגדגדגתגגגגגגגגגגגגגגגגגתגגגגÀ
  28.              ø                  ø´0ø1ø1øuøhøvø1ø1´ step out        ´  I ´
  29.              ø                  øוגדגדגדגדגדגדגדגתגגגגגגגגגגגגגגגגגתגגגגÀ
  30.              ø                  ø´1ø0ø0ømøhø0ø0ø0´ read  sector    ´ II ´
  31.              ø                  øוגדגדגדגדגדגדגדגתגגגגגגגגגגגגגגגגגתגגגגÀ
  32.              ø                  ø´1ø0ø1ømøhø0ø0ød´ write sector    ´ II ´
  33.              ø                  øוגדגדגדגדגדגדגדגתגגגגגגגגגגגגגגגגגתגגגגÀ
  34.              ø                  ø´1ø1ø0ø0øhø0ø0ø0´ read address    ´III ´
  35.              ø                  øוגדגדגדגדגדגדגדגתגגגגגגגגגגגגגגגגגתגגגגÀ
  36.              ø                  ø´1ø1ø1ø0øhø0ø0ø0´ read  track     ´III ´
  37.              ø                  øוגדגדגדגדגדגדגדגתגגגגגגגגגגגגגגגגגתגגגגÀ
  38.              ø                  ø´1ø1ø1ø1øhø0ø0ø0´ write track     ´III ´
  39.              ø                  øוגדגדגדגדגIJגדגדגתגגגגגגגגגגגגגגגגגתגגגגÀ
  40.              ø                  ø´1ø1ø0ø1øintø0ø0´ force interrupt ´ IV ´
  41.              ø                  øזלנלנלנלנלללנלנלטלללללללללללללללללטלללל¶
  42.              ø                  ø         h: motor on test
  43.              ø                  ø           v: verify track
  44.              ø                  ø       u: update track register
  45.              ø                  ø       m: multiple sectors
  46.              ø                  ø               d: DAM type ($FB/$F8)
  47.              ø                  ø         int: 00:without interrupt
  48.              ø                  ø              10:with    interrupt
  49.              ø                  ø              01:after index pulse
  50.              ø                  øset   interrupt requested when command is over
  51.              ø                  øclear interrupt requested when   SR    is read
  52.              ø                  øםגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגגג™
  53.              ø                  øø               write track                   ø
  54.              ø                  øבגגגגגגגגגאגגגגגגגגגגאגגגאגגגגגגגגגגגגגגגגגגגגœ
  55.              ø                  øø byte in ø byte out øMFMø     type           ø
  56.              ø                  øבגגגגגגגגגדגגגגגגגגגגדגגגדגגגגגגגגגגגגגגגגגגגגœ
  57.              ø                  øø $00-$F4 ø  $00-$F4 øyesø data or gap        ø
  58.              ø                  øבגגגגגגגגגדגגגגגגגגגגדגגגדגגגגגגגגגגגגגגגגגגגגœ
  59.              ø                  øø   $F5   ø    $A1   ø noø sync/clearCRC      ø
  60.              ø                  øבגגגגגגגגגדגגגגגגגגגגדגגגדגגגגגגגגגגגגגגגגגגגגœ
  61.              ø                  øø   $F6   ø    $C2   ø noø synchronization    ø
  62.              ø                  øבגגגגגגגגגדגגגגגגגגגגדגגגדגגגגגגגגגגגגגגגגגגגגœ
  63.              ø                  øø   $F7   ø  $ss-$ss ø noø write CRC          ø
  64.              ø                  øבגגגגגגגגגדגגגגגגגגגגדגגגדגגגגגגגגגגגגגגגגגגגגœ
  65.              ø                  øø   $F8   ø    $F8   ø noø data address mark  ø
  66.              ø                  øבגגגגגגגגגדגגגגגגגגגגדגגגדגגגגגגגגגגגגגגגגגגגגœ
  67.              ø                  øø   $F9   ø    $F9   ø noø data mark          ø
  68.              ø                  øבגגגגגגגגגדגגגגגגגגגגדגגגדגגגגגגגגגגגגגגגגגגגגœ
  69.              ø                  øø   $FA   ø    $FA   ø noø data mark          ø
  70.              ø                  øבגגגגגגגגגדגגגגגגגגגגדגגגדגגגגגגגגגגגגגגגגגגגגœ
  71.              ø                  øø   $FB   ø    $FB   ø noø data address mark  ø
  72.              ø                  øבגגגגגגגגגדגגגגגגגגגגדגגגדגגגגגגגגגגגגגגגגגגגגœ
  73.              ø                  øø   $FC   ø    $FC   ø noø data mark          ø
  74.              ø                  øבגגגגגגגגגדגגגגגגגגגגדגגגדגגגגגגגגגגגגגגגגגגגגœ
  75.              ø                  øø   $FD   ø    $FD   ø noø data mark          ø
  76.              ø                  øבגגגגגגגגגדגגגגגגגגגגדגגגדגגגגגגגגגגגגגגגגגגגגœ
  77.              ø                  øø   $FE   ø    $FE   ø noø index address mark ø
  78.              ø                  øבגגגגגגגגגדגגגגגגגגגגדגגגדגגגגגגגגגגגגגגגגגגגגœ
  79.              ø                  øø   $FF   ø    $FF   ø noø data mark          ø
  80.              ijגגגגגגגגגגגגגגגגגגךijגגגגגגגגגIJגגגגגגגגגגIJגגגIJגגגגגגגגגגגגגגגגגגגגך
  81.                  םגגגגגגגגגגגגגג™
  82.                  øTracK Registerø  b7-b0=track
  83.                  ijגגגגגגגגגגגגגגך
  84.                 םגגגגגגגגגגגגגגג™
  85.                 øSeCtor Registerø  b7-b0=sector
  86.                 ijגגגגגגגגגגגגגגגך
  87.                   םגגגגגגגגגגגגג™
  88.                   øDaTa Registerø  b7-b0=data/track to seek
  89.                   ijגגגגגגגגגגגגגך
  90.