+/* 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) */