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94 lines
4.8 KiB
C
94 lines
4.8 KiB
C
/*****************************************************************************/
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/* */
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/* dio.h */
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/* */
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/* Low-Level diskette I/O functions */
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/* */
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/* */
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/* */
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/* (C) 2000 Christian Groessler <cpg@aladdin.de> */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#ifndef _DIO_H
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#define _DIO_H
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typedef unsigned char driveid_t;
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typedef unsigned int sectnum_t;
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typedef unsigned int sectsize_t;
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typedef struct __dhandle_t *dhandle_t;
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typedef struct {
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unsigned char head;
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unsigned track;
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unsigned sector;
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} dio_phys_pos;
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#ifdef __ATARI__
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#define dio_query_sectsize(x) ((_sectsize_t)128)
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#else
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#define dio_query_sectsize(x) ((_sectsize_t)256)
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#endif
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/* queries sector size, currently hardcoded */
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extern dhandle_t __fastcall__ dio_open(driveid_t drive_id);
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/* open drive for subsequent dio access */
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extern unsigned char __fastcall__ dio_close(dhandle_t handle);
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/* close drive, returns oserror (0 for success) */
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extern unsigned char __fastcall__ dio_read(dhandle_t handle,
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sectnum_t sect_num,
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void *buffer);
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/* read sector <sect_num> from drive <handle> to memory at <buffer> */
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/* the number of bytes transferred depends on the sector size */
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/* returns oserror (0 for success) */
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extern unsigned char __fastcall__ dio_write(dhandle_t handle,
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sectnum_t sect_num,
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const void *buffer);
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/* write memory at <buffer> to sector <sect_num> on drive <handle>, no verify */
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/* the number of bytes transferred depends on the sector size */
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/* returns oserror (0 for success) */
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extern unsigned char __fastcall__ dio_write_verify(dhandle_t handle,
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sectnum_t sect_num,
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const void *buffer);
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/* write memory at <buffer> to sector <sect_num> on drive <handle>, verify after write */
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/* the number of bytes transferred depends on the sector size */
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/* returns oserror (0 for success) */
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extern unsigned char __fastcall__ dio_phys_to_log(dhandle_t handle,
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const dio_phys_pos *physpos, /* input */
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sectnum_t *sectnum); /* output */
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/* convert physical sector address (head/track/sector) to logical sector number */
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/* returns oserror (0 for success) */
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extern unsigned char __fastcall__ dio_log_to_phys(dhandle_t handle,
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const sectnum_t *sectnum, /* input */
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dio_phys_pos *physpos); /* output */
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/* convert logical sector number to physical sector address (head/track/sector) */
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/* returns oserror (0 for success) */
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#endif /* #ifndef _DIO_H */
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