/*****************************************************************************/
/* */
-/* dio.h */
+/* dio.h */
/* */
-/* Low-Level diskette I/O functions */
+/* Low-Level diskette I/O functions */
/* */
/* */
/* */
-/* (C) 2000 Christian Groessler <cpg@aladdin.de> */
+/* (C) 2005 Christian Groessler <chris@groessler.org> */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* */
/*****************************************************************************/
+
+
#ifndef _DIO_H
#define _DIO_H
-typedef unsigned char _driveid_t;
-typedef unsigned int _sectnum_t;
-typedef unsigned int _sectsize_t;
-#ifdef __ATARI__
-#define _dio_query_sectsize(x) ((_sectsize_t)128)
-#else
-#define _dio_query_sectsize(x) ((_sectsize_t)256)
-#endif
+/* Please note: All functions in this file will set _oserror *and* return its
+** value. The only exception is dio_open, which will return NULL, but _oserror
+** will be set. All function will also set _oserror in case of successful
+** execution, effectively clearing it.
+*/
+
+
+
+/*****************************************************************************/
+/* Data */
+/*****************************************************************************/
+
+
+
+typedef struct __dhandle_t *dhandle_t;
+
+typedef struct {
+ unsigned char head;
+ unsigned track;
+ unsigned sector;
+} dio_phys_pos;
+
+
+
+/*****************************************************************************/
+/* Code */
+/*****************************************************************************/
+
+
+
+unsigned __fastcall__ dio_query_sectsize (dhandle_t handle);
+/* returns sector size */
+
+unsigned __fastcall__ dio_query_sectcount (dhandle_t handle);
+/* returns sector count */
+
+dhandle_t __fastcall__ dio_open (unsigned char device);
+/* open device for subsequent dio access */
+
+unsigned char __fastcall__ dio_close (dhandle_t handle);
+/* close device, returns oserror (0 for success) */
+
+unsigned char __fastcall__ dio_read (dhandle_t handle,
+ unsigned sect_num,
+ void *buffer);
+/* read sector <sect_num> from device <handle> to memory at <buffer> */
+/* the number of bytes transferred depends on the sector size */
+/* returns oserror (0 for success) */
+
+unsigned char __fastcall__ dio_write (dhandle_t handle,
+ unsigned sect_num,
+ const void *buffer);
+/* write memory at <buffer> to sector <sect_num> on device <handle>, no verify */
+/* the number of bytes transferred depends on the sector size */
+/* returns oserror (0 for success) */
-extern unsigned char __fastcall__ _dio_open (_driveid_t drive_id);
-extern unsigned char __fastcall__ _dio_close (_driveid_t drive_id);
-extern unsigned char __fastcall__ _dio_format (_driveid_t drive_id, unsigned int format);
-extern unsigned char __fastcall__ _dio_read (_driveid_t drive_id, _sectnum_t sect_num, void *buffer);
-extern unsigned char __fastcall__ _dio_write (_driveid_t drive_id, _sectnum_t sect_num, void *buffer);
-extern unsigned char __fastcall__ _dio_write_verify(_driveid_t drive_id, _sectnum_t sect_num, void *buffer);
+unsigned char __fastcall__ dio_write_verify (dhandle_t handle,
+ unsigned sect_num,
+ const void *buffer);
+/* write memory at <buffer> to sector <sect_num> on device <handle>, verify after write */
+/* the number of bytes transferred depends on the sector size */
+/* returns oserror (0 for success) */
+unsigned char __fastcall__ dio_phys_to_log (dhandle_t handle,
+ const dio_phys_pos *physpos, /* input */
+ unsigned *sectnum); /* output */
+/* convert physical sector address (head/track/sector) to logical sector number */
+/* returns oserror (0 for success) */
-extern _sectnum_t __fastcall__ _dio_chs_to_snum(unsigned int cyl, unsigned int head, unsigned int sector);
-extern void __fastcall__ _dio_snum_to_chs(_sectnum_t sect_num,
- unsigned int *cyl,
- unsigned int *head,
- unsigned int *sector);
+unsigned char __fastcall__ dio_log_to_phys (dhandle_t handle,
+ const unsigned *sectnum, /* input */
+ dio_phys_pos *physpos); /* output */
+/* convert logical sector number to physical sector address (head/track/sector) */
+/* returns oserror (0 for success) */
#endif /* #ifndef _DIO_H */