ipxe/src/arch/x86/include/bios.h

#ifndef BIOS_H
#define BIOS_H

FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );

#define BDA_SEG 0x0040
#define BDA_EBDA 0x000e
#define BDA_EQUIPMENT_WORD 0x0010
#define BDA_FBMS 0x0013
#define BDA_TICKS 0x006c
#define BDA_MIDNIGHT 0x0070
#define BDA_REBOOT 0x0072
#define BDA_REBOOT_WARM 0x1234
#define BDA_NUM_DRIVES 0x0075
#define BDA_CHAR_HEIGHT 0x0085

#endif /* BIOS_H */