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Text File  |  1988-09-19  |  3.6 KB  |  137 lines
  1. ********************************************************************
  2. *               Commodore-Amiga, Inc.                              *
  3. *               trackdisk.i                                        *
  4. ********************************************************************
  5. ********************************************************************
  6. *
  7. * trackdisk.i
  8. *
  9. * Source Control
  10. * ------ -------
  11. * 
  12. * $Header: trackdisk.i,v 27.2 85/07/12 23:16:27 neil Exp $
  13. *
  14. * $Locker:  $
  15. *
  16. *********************************************************************
  17.  
  18.    IFND  DEVICES_TRACKDISK_I
  19. DEVICES_TRACKDISK_I  SET   1
  20.  
  21.    IFND  EXEC_IO_I
  22.    INCLUDE  "exec/io.i"
  23.    ENDC  !EXEC_IO_I
  24.  
  25. *--------------------------------------------------------------------
  26. *
  27. * Physical drive constants
  28. *
  29. *--------------------------------------------------------------------
  30.  
  31.  
  32. NUMCYLS     EQU   80          ; normal # of cylinders
  33. MAXCYLS     EQU   NUMCYLS+20  ; max # of cyls to look for
  34. *                             ;  during a calibrate
  35. NUMSECS     EQU   11
  36. NUMHEADS    EQU   2
  37. MAXRETRY    EQU   10
  38. NUMTRACKS   EQU   NUMCYLS*NUMHEADS
  39. NUMUNITS    EQU   4
  40.  
  41. *--------------------------------------------------------------------
  42. *
  43. * Useful constants
  44. *
  45. *--------------------------------------------------------------------
  46.  
  47.  
  48. *-- sizes before mfm encoding
  49. TD_SECTOR   EQU   512
  50. TD_SECSHIFT EQU   9        ; log TD_SECTOR
  51. *                          ;    2
  52.  
  53.  
  54. *--------------------------------------------------------------------
  55. *
  56. * Driver Specific Commands
  57. *
  58. *--------------------------------------------------------------------
  59.  
  60. *-- TD_NAME is a generic macro to get the name of the driver.  This
  61. *-- way if the name is ever changed you will pick up the change
  62. *-- automatically.
  63. *--
  64. *-- Normal usage would be:
  65. *--
  66. *-- internalName: TD_NAME
  67. *--
  68.  
  69. TD_NAME: MACRO
  70.       DC.B  'trackdisk.device',0
  71.       DS.W  0
  72.       ENDM
  73.  
  74.    BITDEF   TD,EXTCOM,15
  75.  
  76.    DEVINIT
  77.    DEVCMD   TD_MOTOR          ; control the disk's motor
  78.    DEVCMD   TD_SEEK           ; explicit seek (for testing)
  79.    DEVCMD   TD_FORMAT         ; format disk
  80.    DEVCMD   TD_REMOVE         ; notify when disk changes
  81.    DEVCMD   TD_CHANGENUM      ; number of disk changes
  82.    DEVCMD   TD_CHANGESTATE    ; is there a disk in the drive?
  83.    DEVCMD   TD_PROTSTATUS     ; is the disk write protected?
  84.  
  85. TD_LASTCOMM EQU   TD_PROTSTATUS
  86.  
  87. *
  88. *
  89. * The disk driver has an "extended command" facility.  These commands
  90. * take a superset of the normal IO Request block.
  91. *
  92. ETD_WRITE   EQU   (CMD_WRITE!TDF_EXTCOM)
  93. ETD_READ    EQU   (CMD_READ!TDF_EXTCOM)
  94. ETD_MOTOR   EQU   (TD_MOTOR!TDF_EXTCOM)
  95. ETD_SEEK    EQU   (TD_SEEK!TDF_EXTCOM)
  96. ETD_FORMAT  EQU   (TD_FORMAT!TDF_EXTCOM)
  97. ETD_UPDATE  EQU   (CMD_UPDATE!TDF_EXTCOM)
  98. ETD_CLEAR   EQU   (CMD_CLEAR!TDF_EXTCOM)
  99.  
  100.  
  101. *
  102. * extended IO has a larger than normal io request block.
  103. *
  104.  
  105.  STRUCTURE IOEXTTD,IOSTD_SIZE
  106.    ULONG IOTD_COUNT           ; removal/insertion count
  107.    ULONG IOTD_SECLABEL        ; sector label data region
  108.    LABEL IOTD_SIZE
  109.  
  110. * labels are TD_LABELSIZE bytes per sector
  111.  
  112. TD_LABELSIZE         EQU   16
  113.  
  114. *--------------------------------------------------------------------
  115. *
  116. * Driver error defines
  117. *
  118. *--------------------------------------------------------------------
  119.  
  120. TDERR_NotSpecified   EQU   20
  121. TDERR_NoSecHdr       EQU   21
  122. TDERR_BadSecPreamble EQU   22
  123. TDERR_BadSecID       EQU   23
  124. TDERR_BadHdrSum      EQU   24
  125. TDERR_BadSecSum      EQU   25
  126. TDERR_TooFewSecs     EQU   26
  127. TDERR_BadSecHdr      EQU   27
  128. TDERR_WriteProt      EQU   28
  129. TDERR_DiskChanged    EQU   29
  130. TDERR_SeekError      EQU   30
  131. TDERR_NoMem          EQU   31
  132. TDERR_BadUnitNum     EQU   32
  133. TDERR_BadDriveType   EQU   33
  134. TDERR_DriveInUse     EQU   34
  135.  
  136.    ENDC  DEVICE_TRACKDISK_I
  137.