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linux/include/asm-i386/boot.h

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#ifndef _LINUX_BOOT_H
#define _LINUX_BOOT_H
/* Don't touch these, unless you really know what you're doing. */
#define DEF_INITSEG 0x9000
#define DEF_SYSSEG 0x1000
#define DEF_SETUPSEG 0x9020
#define DEF_SYSSIZE 0x7F00
/* Internal svga startup constants */
#define NORMAL_VGA 0xffff /* 80x25 mode */
#define EXTENDED_VGA 0xfffe /* 80x50 mode */
#define ASK_VGA 0xfffd /* ask for it at bootup */
#endif