include/fd.h

   1 #ifndef _FD_H
   2 #define _FD_H
   3
   4
   5 /* fd controller registers */
   6 #define FD_STATUS        0x3f4
   7 #define FD_DATA          0x3f5
   8 #define FD_DOR           0x3f2
   9 #define FD_DIR           0x3f7
  10 #define FD_DCR           0x3f7
  11
  12 /* Bits of main status register */
  13 #define STATUS_BUSYMASK 0x0F            /* drive busy mask */
  14 #define STATUS_BUSY     0x10            /* FDC busy */
  15 #define STATUS_DMA      0x20            /* 0- DMA mode */
  16 #define STATUS_DIR      0x40            /* 0- cpu->fdc */
  17 #define STATUS_READY    0x80            /* Data reg ready */
  18
  19 /* Bits of FD_ST0 */
  20 #define ST0_DS          0x03            /* drive select mask */
  21 #define ST0_HA          0x04            /* Head (Address) */
  22 #define ST0_NR          0x08            /* Not Ready */
  23 #define ST0_ECE         0x10            /* Equipment chech error */
  24 #define ST0_SE          0x20            /* Seek end */
  25 #define ST0_INTR        0xC0            /* Interrupt code mask */
  26
  27 /* Bits of FD_ST1 */
  28 #define ST1_MAM         0x01            /* Missing Address Mark */
  29 #define ST1_WP          0x02            /* Write Protect */
  30 #define ST1_ND          0x04            /* No Data - unreadable */
  31 #define ST1_OR          0x10            /* OverRun */
  32 #define ST1_CRC         0x20            /* CRC error in data or addr */
  33 #define ST1_EOC         0x80            /* End Of Cylinder */
  34
  35 /* Bits of FD_ST2 */
  36 #define ST2_MAM         0x01            /* Missing Addess Mark (again) */
  37 #define ST2_BC          0x02            /* Bad Cylinder */
  38 #define ST2_SNS         0x04            /* Scan Not Satisfied */
  39 #define ST2_SEH         0x08            /* Scan Equal Hit */
  40 #define ST2_WC          0x10            /* Wrong Cylinder */
  41 #define ST2_CRC         0x20            /* CRC error in data field */
  42 #define ST2_CM          0x40            /* Control Mark = deleted */
  43
  44 /* Bits of FD_ST3 */
  45 #define ST3_HA          0x04            /* Head (Address) */
  46 #define ST3_TZ          0x10            /* Track Zero signal (1=track 0) */
  47 #define ST3_WP          0x40            /* Write Protect */
  48
  49 /* Values for FD_COMMAND */
  50 #define FD_RECALIBRATE  0x07            /* move to track 0 */
  51 #define FD_SEEK         0x0F            /* seek track */
  52 #define FD_READ         0xE6//0xE6              /* read with MT, MFM, SKip deleted */
  53 #define FD_WRITE        0xC5//0xC5              /* write with MT, MFM */
  54 #define FD_SENSEI       0x08            /* Sense Interrupt Status */
  55 #define FD_SPECIFY      0x03            /* specify HUT etc */
  56
  57 /* DMA commands */
  58 #define DMA_READ        0x46
  59 #define DMA_WRITE       0x4A//0x4A
  60
  61
  62 extern void floppy_interrupt(void);
  63 void do_fd_request(int, void*, int );
  64
  65 void floppy_read(int, void *);
  66 void floppy_write(int, void *);
  67 void floppy_reads(int, void *, unsigned int);
  68 void floppy_writes(int, void *, unsigned int);
  69 void floppy_init(void);
  70
  71 #endif
  72
  73