git: 9front

ref: 59f4b896ec0cfd7ec69f13bd0972d1f790e129fb
dir: /sys/src/boot/pc/e820.s/

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#include "x16.h"
#include "mem.h"

TEXT e820(SB), $0
	MOVL bx+4(SP), BX
	MOVL p+8(SP), DI

	MOVL $0xe820, AX
	MOVL $0x534D4150, DX
	CALL rmode16(SB)
	LWI(24, rCX)
	BIOSCALL(0x15)
	JC _bad
	CALL16(pmode32(SB))
	MOVL BX, AX
	RET
_bad:
	CALL16(pmode32(SB))
	XORL AX, AX
	RET