mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-12-24 07:29:42 +00:00
120 lines
3.9 KiB
C
120 lines
3.9 KiB
C
/**
|
|
* \addtogroup c64fs
|
|
* @{
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
* C64 direct disk I/O.
|
|
* \author Adam Dunkels <adam@dunkels.com>
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2003, Adam Dunkels.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials provided
|
|
* with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote
|
|
* products derived from this software without specific prior
|
|
* written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
|
|
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
|
|
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
|
|
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* This file is part of the Contiki desktop OS
|
|
*
|
|
* $Id: c64-dio.c,v 1.1 2007/05/23 23:11:28 oliverschmidt Exp $
|
|
*
|
|
*/
|
|
|
|
#include "c64-dio.h"
|
|
#include "c64-dio-asm.h"
|
|
|
|
/*-----------------------------------------------------------------------------------*/
|
|
/**
|
|
* Read a block of data (256 bytes) from the disk.
|
|
*
|
|
* \param track The track of the disk block to be read.
|
|
*
|
|
* \param sector The sector of the disk block to be read.
|
|
*
|
|
* \param ptr A pointer to a buffer than must be able to accomodate
|
|
* 256 bytes of data.
|
|
*
|
|
* \return An error code or C64_DIO_OK if the data was successfully
|
|
* read.
|
|
*/
|
|
/*-----------------------------------------------------------------------------------*/
|
|
unsigned char
|
|
c64_dio_read_block(unsigned char track,
|
|
unsigned char sector,
|
|
unsigned char *ptr)
|
|
{
|
|
c64_dio_asm_track = track;
|
|
c64_dio_asm_sector = sector;
|
|
c64_dio_asm_ptr = ptr;
|
|
return c64_dio_asm_read_block();
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
/**
|
|
* Write a block of data (256 bytes) to the disk.
|
|
*
|
|
* \param track The track of the disk block to be written.
|
|
*
|
|
* \param sector The sector of the disk block to be written.
|
|
*
|
|
* \param ptr A pointer to a buffer containing the 256 bytes of data
|
|
* to be written.
|
|
*
|
|
* \return An error code or C64_DIO_OK if the data was successfully
|
|
* written.
|
|
*/
|
|
/*-----------------------------------------------------------------------------------*/
|
|
unsigned char
|
|
c64_dio_write_block(unsigned char track,
|
|
unsigned char sector,
|
|
unsigned char *ptr)
|
|
{
|
|
c64_dio_asm_track = track;
|
|
c64_dio_asm_sector = sector;
|
|
c64_dio_asm_ptr = ptr;
|
|
return c64_dio_asm_write_block();
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
/**
|
|
* Initialize the direct disk I/O routines for a particular disk drive.
|
|
*
|
|
* This function must be called before any of the other direct disk
|
|
* I/O functions can be used.
|
|
*
|
|
* \param drive The drive number of the disk drive for which the
|
|
* direct disk I/O should be enabled.
|
|
*/
|
|
/*-----------------------------------------------------------------------------------*/
|
|
void
|
|
c64_dio_init(unsigned char drive)
|
|
{
|
|
c64_dio_asm_init(drive);
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
/** @} */
|