blob: 8901b7d4b2a99a8e016f8f75ba0ad44dd6747c58 [file] [log] [blame]
// 16bit code to access hard drives.
//
// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
// Copyright (C) 2002 MandrakeSoft S.A.
//
// This file may be distributed under the terms of the GNU GPLv3 license.
#include "disk.h" // floppy_13
#include "biosvar.h" // struct bregs
#include "util.h" // debug_enter
static void
disk_13(struct bregs *regs, u8 drive)
{
set_cf(regs, 1);
}
static void
handle_legacy_disk(struct bregs *regs, u8 drive)
{
if (drive < 0x80) {
floppy_13(regs, drive);
return;
}
#if BX_USE_ATADRV
if (drive >= 0xE0) {
int13_cdrom(regs); // xxx
return;
}
#endif
disk_13(regs, drive);
}
void VISIBLE
handle_40(struct bregs *regs)
{
debug_enter(regs);
handle_legacy_disk(regs, regs->dl);
debug_exit(regs);
}
// INT 13h Fixed Disk Services Entry Point
void VISIBLE
handle_13(struct bregs *regs)
{
debug_enter(regs);
u8 drive = regs->dl;
#if BX_ELTORITO_BOOT
if (regs->ah >= 0x4a || regs->ah <= 0x4d) {
int13_eltorito(regs);
} else if (cdemu_isactive() && cdrom_emulated_drive()) {
int13_cdemu(regs);
} else
#endif
handle_legacy_disk(regs, drive);
debug_exit(regs);
}
// record completion in BIOS task complete flag
void VISIBLE
handle_76(struct bregs *regs)
{
debug_enter(regs);
SET_BDA(floppy_harddisk_info, 0xff);
eoi_both_pics();
}