hdreg.h ( File view )

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			/*
* This file contains some defines for the AT-hd-controller.
* Various sources. Check out some definitions (see comments with
* a ques).
*/
/*
* 本文件含有一些AT 硬盘控制器的定义。来自各种资料。请查证某些
* 定义(带有问号的注释)。
*/
#ifndef _HDREG_H
#define _HDREG_H

/* Hd controller regs. Ref: IBM AT Bios-listing */
/* 硬盘控制器寄存器端口。参见:IBM AT Bios 程序 */
#define HD_DATA 0x1f0		/* _CTL when writing */
#define HD_ERROR 0x1f1		/* see err-bits */
#define HD_NSECTOR 0x1f2	/* nr of sectors to read/write */
#define HD_SECTOR 0x1f3		/* starting sector */
#define HD_LCYL 0x1f4		/* starting cylinder */
#define HD_HCYL 0x1f5		/* high byte of starting cyl */
#define HD_CURRENT 0x1f6	/* 101dhhhh , d=drive, hhhh=head */
#define HD_STATUS 0x1f7		/* see status-bits */
#define HD_PRECOMP HD_ERROR	/* same io address, read=error, write=precomp */
#define HD_COMMAND HD_STATUS	/* same io address, read=status, write=cmd */

#define HD_CMD 0x3f6		// 控制寄存器端口。

/* Bits of HD_STATUS */
/* 硬盘状态寄存器各位的定义(HD_STATUS) */
#define ERR_STAT 0x01		// 命令执行错误。
#define INDEX_STAT 0x02		// 收到索引。
#define ECC_STAT 0x04 /* Corrected error */	// ECC 校验错。
#define DRQ_STAT 0x08		// 请求服务。
#define SEEK_STAT 0x10		// 寻道结束。
#define WRERR_STAT 0x20		// 驱动器故障。
#define READY_STAT 0x40		// 驱动器准备好(就绪)。
#define BUSY_STAT 0x80		// 控制器忙碌。

/* Values for HD_COMMAND */
/* 硬盘命令值(HD_CMD) */
#define WIN_RESTORE 0x10	// 驱动器重新校正(驱动器复位)。
#define WIN_READ 0x20		// 读扇区。
#define WIN_WRITE 0x30		// 写扇区。
#define WIN_VERIFY 0x40		// 扇区检验。
#define WIN_FORMAT 0x50		// 格式化磁道。
#define WIN_INIT 0x60		// 控制器初始化。
#define WIN_SEEK 0x70		// 寻道。
#define WIN_DIAGNOSE 0x90	// 控制器诊断。
#define WIN_SPECIFY 0x91	// 建立驱动器参数。

/* Bits for HD_ERROR */
/* 错误寄存器各比特位的含义(HD_ERROR) */
// 执行控制器诊断命令时含义与其它命令时的不同。下面分别列出:
// ==================================================
// 诊断命令时 其它命令时
// --------------------------------------------------
// 0x01 无错误 数据标志丢失
// 0x02 控制器出错 磁道0 错
// 0x03 扇区缓冲区错
// 0x04 ECC 部件错 命令放弃
// 0x05 控制处理器错
// 0x10 ID 未找到
// 0x40 ECC 错误
// 0x80 坏扇区
//---------------------------------------------------
#define MARK_ERR 0x01		/* Bad address mark ? */
#define TRK0_ERR 0x02		/* couldn't find track 0 */
#define ABRT_ERR 0x04		/* ? */
#define ID_ERR 0x10		/* ? */
#define ECC_ERR 0x40		/* ? */
#define BBD_ERR 0x80		/* ? */

// 硬盘分区表结构。参见下面列表后信息。
struct partition
{

  unsigned char boot_ind;	/* 0x80 - active (unused) */
  unsigned char head;		/* ? */
  unsigned char sector;		/* ? */
  unsigned char cyl;		/* ? */
  unsigned char sys_ind;	/* ? */
  unsigned char end_head;	/* ? */
  unsigned char end_sector;	/* ? */
  unsigned char end_cyl;	/* ? */
  unsigned int start_sect;	/* starting sector counting from 0 */
  unsigned int nr_sects;	/* nr of sectors in partition */

};

#endif
			
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<boot>0.00 B04-10-07 15:01
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fcntl.h3.30 kB02-09-04 13:14
<linux>0.00 B04-10-07 15:01
config.h2.16 kB02-09-04 13:14
fs.h9.72 kB02-09-04 13:14
hdreg.h2.94 kB02-09-04 13:14
head.h760.00 B02-09-04 13:14
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<chr_drv>0.00 B04-10-07 15:01
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