/*****************************************************************************/
/* */
-/* 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 <cpg@aladdin.de> */
/* */
/* */
/* 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;
-typedef void *_dhandle_t;
-
-
-#ifdef __ATARI__
-#define _dio_query_sectsize(x) ((_sectsize_t)128)
-#else
-#define _dio_query_sectsize(x) ((_sectsize_t)256)
-#endif
-
-extern _dhandle_t __fastcall__ _dio_open (_driveid_t drive_id);
-extern unsigned char __fastcall__ _dio_close (_dhandle_t handle);
-extern unsigned char __fastcall__ _dio_format(_dhandle_t handle,
- unsigned int format);
-extern unsigned char __fastcall__ _dio_read(_dhandle_t handle,
- _sectnum_t sect_num,
- void *buffer);
-extern unsigned char __fastcall__ _dio_write(_dhandle_t handle,
- _sectnum_t sect_num,
- const void *buffer);
-extern unsigned char __fastcall__ _dio_write_verify(_dhandle_t handle,
- _sectnum_t sect_num,
- const void *buffer);
-
-extern _sectnum_t __fastcall__ _dio_chs_to_snum(_dhandle_t handle,
- unsigned int cyl,
- unsigned int head,
- unsigned int sector);
-extern void __fastcall__ _dio_snum_to_chs(_dhandle_t handle,
- _sectnum_t sect_num,
- unsigned int *cyl,
- unsigned int *head,
- unsigned int *sector);
+
+
+/* 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 unsigned char driveid_t;
+typedef unsigned int sectnum_t;
+typedef unsigned int sectsize_t;
+typedef struct __dhandle_t *dhandle_t;
+
+typedef struct {
+ unsigned char head;
+ unsigned track;
+ unsigned sector;
+} dio_phys_pos;
+
+
+
+/*****************************************************************************/
+/* Code */
+/*****************************************************************************/
+
+
+
+sectsize_t __fastcall__ dio_query_sectsize(dhandle_t handle);
+/* queries sector size, currently hardcoded */
+
+sectnum_t __fastcall__ dio_query_sectcount(dhandle_t handle);
+/* Return the sector count for a disk. */
+
+dhandle_t __fastcall__ dio_open(driveid_t drive_id);
+/* open drive for subsequent dio access */
+
+unsigned char __fastcall__ dio_close(dhandle_t handle);
+/* close drive, returns oserror (0 for success) */
+
+unsigned char __fastcall__ dio_read(dhandle_t handle,
+ sectnum_t sect_num,
+ void *buffer);
+/* read sector <sect_num> from drive <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,
+ sectnum_t sect_num,
+ const void *buffer);
+/* write memory at <buffer> to sector <sect_num> on drive <handle>, no verify */
+/* the number of bytes transferred depends on the sector size */
+/* returns oserror (0 for success) */
+
+unsigned char __fastcall__ dio_write_verify(dhandle_t handle,
+ sectnum_t sect_num,
+ const void *buffer);
+/* write memory at <buffer> to sector <sect_num> on drive <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 */
+ sectnum_t *sectnum); /* output */
+/* convert physical sector address (head/track/sector) to logical sector number */
+/* returns oserror (0 for success) */
+
+unsigned char __fastcall__ dio_log_to_phys(dhandle_t handle,
+ const sectnum_t *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 */