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// Definitions for X86 bios disks.
//
// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
//
// This file may be distributed under the terms of the GNU GPLv3 license.
#ifndef __DISK_H
#define __DISK_H
#include "ioport.h" // outb
#include "biosvar.h" // struct bregs
#define DISK_RET_SUCCESS 0x00
#define DISK_RET_EPARAM 0x01
#define DISK_RET_ECHANGED 0x06
#define DISK_RET_EBOUNDARY 0x09
#define DISK_RET_EBADTRACK 0x0c
#define DISK_RET_ECONTROLLER 0x20
#define DISK_RET_ETIMEOUT 0x80
#define DISK_RET_ENOTREMOVABLE 0xb2
#define DISK_RET_EMEDIA 0xC0
#define DISK_RET_ENOTREADY 0xAA
// Bios disk structures.
struct int13ext_s {
u8 size;
u8 reserved;
u16 count;
u16 offset;
u16 segment;
u32 lba1;
u32 lba2;
};
#define GET_INT13EXT(regs,var) \
GET_FARVAR((regs)->ds, ((struct int13ext_s*)((regs)->si+0))->var)
#define SET_INT13EXT(regs,var,val) \
SET_FARVAR((regs)->ds, ((struct int13ext_s*)((regs)->si+0))->var, (val))
// Disk Physical Table definition
struct int13dpt_s {
u16 size;
u16 infos;
u32 cylinders;
u32 heads;
u32 spt;
u32 sector_count1;
u32 sector_count2;
u16 blksize;
u16 dpte_offset;
u16 dpte_segment;
u16 key;
u8 dpi_length;
u8 reserved1;
u16 reserved2;
u8 host_bus[4];
u8 iface_type[8];
u8 iface_path[8];
u8 device_path[8];
u8 reserved3;
u8 checksum;
};
#define GET_INT13DPT(regs,var) \
GET_FARVAR((regs)->ds, ((struct int13dpt_s*)((regs)->si+0))->var)
#define SET_INT13DPT(regs,var,val) \
SET_FARVAR((regs)->ds, ((struct int13dpt_s*)((regs)->si+0))->var, (val))
// Floppy "Disk Base Table"
struct floppy_dbt_s {
u8 specify1;
u8 specify2;
u8 shutoff_ticks;
u8 bps_code;
u8 sectors;
u8 interblock_len;
u8 data_len;
u8 gap_len;
u8 fill_byte;
u8 settle_time;
u8 startup_time;
};
struct floppy_ext_dbt_s {
struct floppy_dbt_s dbt;
// Extra fields
u8 max_track;
u8 data_rate;
u8 drive_type;
};
// floppy.c
void floppy_13(struct bregs *regs, u8 drive);
void floppy_tick();
#endif // disk.h