Shamusworld >> Repos - apple2/blob - src/floppy.h

   1 //
   2 // Apple 2 floppy disk support
   3 //
   4
   5 #ifndef __FLOPPY_H__
   6 #define __FLOPPY_H__
   7
   8 // MAX_PATH isn't defined in stdlib.h on *nix, so we do it here...
   9 #ifdef __GCCUNIX__
  10 #include <limits.h>
  11 #define MAX_PATH                _POSIX_PATH_MAX
  12 #else
  13 #include <stdlib.h>                                                             // for MAX_PATH on MinGW/Darwin
  14 #endif
  15 #include <stdint.h>
  16
  17 enum { DT_UNKNOWN, DT_DOS33, DT_DOS33_HDR, DT_PRODOS, DT_NYBBLE };
  18
  19 class FloppyDrive
  20 {
  21         public:
  22                 FloppyDrive();
  23                 ~FloppyDrive();
  24
  25                 bool LoadImage(const char * filename, uint8_t driveNum = 0);
  26                 bool SaveImage(uint8_t driveNum = 0);
  27                 bool SaveImageAs(const char * filename, uint8_t driveNum = 0);
  28                 void CreateBlankImage(uint8_t driveNum = 0);
  29                 void SwapImages(void);
  30                 const char * GetImageName(uint8_t driveNum = 0);
  31                 void EjectImage(uint8_t driveNum = 0);
  32                 bool DriveIsEmpty(uint8_t driveNum = 0);
  33                 bool DiskIsWriteProtected(uint8_t driveNum = 0);
  34                 void SetWriteProtect(bool, uint8_t driveNum = 0);
  35
  36                 // I/O functions ($C0Ex accesses)
  37
  38                 void ControlStepper(uint8_t addr);
  39                 void ControlMotor(uint8_t addr);
  40                 void DriveEnable(uint8_t addr);
  41                 uint8_t ReadWrite(void);
  42                 uint8_t GetLatchValue(void);
  43                 void SetLatchValue(uint8_t value);
  44                 void SetReadMode(void);
  45                 void SetWriteMode(void);
  46
  47         protected:
  48                 void DetectImageType(const char * filename, uint8_t driveNum);
  49                 void NybblizeImage(uint8_t driveNum);
  50                 void DenybblizeImage(uint8_t driveNum);
  51
  52         private:
  53                 char imageName[2][MAX_PATH];
  54                 uint8_t * disk[2];
  55                 uint32_t diskSize[2];
  56                 uint8_t diskType[2];
  57                 bool imageDirty[2];
  58                 bool writeProtected[2];
  59                 uint8_t motorOn;
  60                 uint8_t activeDrive;
  61                 uint8_t ioMode;
  62                 uint8_t latchValue;
  63                 uint8_t phase;
  64                 uint8_t track;
  65
  66                 uint8_t nybblizedImage[2][232960];
  67                 uint32_t currentPos;
  68
  69                 // And here are some private class variables (to reduce function redundancy):
  70                 static uint8_t header[21];
  71                 static uint8_t doSector[16];
  72                 static uint8_t poSector[16];
  73                 static char nameBuf[MAX_PATH];
  74 };
  75
  76 #endif  // __FLOPPY_H__