1 /*****************************************************************************/
5 /* Low-Level diskette I/O functions */
9 /* (C) 2000 Christian Groessler <cpg@aladdin.de> */
12 /* This software is provided 'as-is', without any expressed or implied */
13 /* warranty. In no event will the authors be held liable for any damages */
14 /* arising from the use of this software. */
16 /* Permission is granted to anyone to use this software for any purpose, */
17 /* including commercial applications, and to alter it and redistribute it */
18 /* freely, subject to the following restrictions: */
20 /* 1. The origin of this software must not be misrepresented; you must not */
21 /* claim that you wrote the original software. If you use this software */
22 /* in a product, an acknowledgment in the product documentation would be */
23 /* appreciated but is not required. */
24 /* 2. Altered source versions must be plainly marked as such, and must not */
25 /* be misrepresented as being the original software. */
26 /* 3. This notice may not be removed or altered from any source */
29 /*****************************************************************************/
34 typedef unsigned char driveid_t;
35 typedef unsigned int sectnum_t;
36 typedef unsigned int sectsize_t;
37 typedef struct __dhandle_t *dhandle_t;
47 #define dio_query_sectsize(x) ((_sectsize_t)128)
49 #define dio_query_sectsize(x) ((_sectsize_t)256)
51 /* queries sector size, currently hardcoded */
53 extern dhandle_t __fastcall__ dio_open(driveid_t drive_id);
54 /* open drive for subsequent dio access */
56 extern unsigned char __fastcall__ dio_close(dhandle_t handle);
57 /* close drive, returns oserror (0 for success) */
59 extern unsigned char __fastcall__ dio_read(dhandle_t handle,
62 /* read sector <sect_num> from drive <handle> to memory at <buffer> */
63 /* the number of bytes transferred depends on the sector size */
64 /* returns oserror (0 for success) */
66 extern unsigned char __fastcall__ dio_write(dhandle_t handle,
69 /* write memory at <buffer> to sector <sect_num> on drive <handle>, no verify */
70 /* the number of bytes transferred depends on the sector size */
71 /* returns oserror (0 for success) */
73 extern unsigned char __fastcall__ dio_write_verify(dhandle_t handle,
76 /* write memory at <buffer> to sector <sect_num> on drive <handle>, verify after write */
77 /* the number of bytes transferred depends on the sector size */
78 /* returns oserror (0 for success) */
81 extern unsigned char __fastcall__ dio_phys_to_log(dhandle_t handle,
82 const dio_phys_pos *physpos, /* input */
83 sectnum_t *sectnum); /* output */
84 /* convert physical sector address (head/track/sector) to logical sector number */
85 /* returns oserror (0 for success) */
87 extern unsigned char __fastcall__ dio_log_to_phys(dhandle_t handle,
88 const sectnum_t *sectnum, /* input */
89 dio_phys_pos *physpos); /* output */
90 /* convert logical sector number to physical sector address (head/track/sector) */
91 /* returns oserror (0 for success) */
93 #endif /* #ifndef _DIO_H */