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Rev 139 Rev 149
Line 46... Line 46...
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e820begin:
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e820begin:
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	xorl	%ebx,%ebx	# during first call, ebx must be 0
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	xorl	%ebx,%ebx	# during first call, ebx must be 0
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	movw	%bx,%ds
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	movw	%bx,%ds
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	movw	%bx,%es
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	movw	%bx,%es
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	movw	$e820table,%di
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	movw	$e820table,%di
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	movb	$E820_MAX_RECORDS,(e820counter)
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	movb	$E820_MAX_RECORDS,e820counter
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e820loop:
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e820loop:
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	movl	$E820_SMAP,%edx 	# control sequence "SMAP"
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	movl	$E820_SMAP,%edx 	# control sequence "SMAP"
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	movl	$0x0000e820,%eax	# service
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	movl	$0x0000e820,%eax	# service
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	movl	$E820_RECORD_SIZE,%ecx
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	movl	$E820_RECORD_SIZE,%ecx
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	movw	%di,%ax		# next record
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	movw	%di,%ax		# next record
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	addw	$E820_RECORD_SIZE,%ax
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	addw	$E820_RECORD_SIZE,%ax
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	movw	%ax,%di
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	movw	%ax,%di
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	decb	(e820counter) # buffer is full
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	decb	e820counter # buffer is full
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	jz	e820end
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	jz	e820end
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	cmpl	$0,%ebx
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	cmpl	$0,%ebx
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	jne	e820loop
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	jne	e820loop
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e820end:
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e820end:
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	movb	$E820_MAX_RECORDS,%al
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	movb	$E820_MAX_RECORDS,%al
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	subb	(e820counter),%al
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	subb	e820counter,%al
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	movb	%al,(e820counter) # store # of valid entries in e820counter
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	movb	%al,e820counter # store # of valid entries in e820counter
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	jmp	e801begin
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	jmp	e801begin
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e820err:
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e820err:
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	movb	$0,(e820counter)
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	movb	$0,e820counter
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# method e801 - get size of memory
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# method e801 - get size of memory
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e801begin:
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e801begin:
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	xorw	%dx,%dx
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	xorw	%dx,%dx
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e801cxdx:
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e801cxdx:
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	andl	$0xffff,%edx
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	andl	$0xffff,%edx
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	shll	$6,%edx
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	shll	$6,%edx
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	andl	$0xffff,%ecx
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	andl	$0xffff,%ecx
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	addl	%ecx,%edx
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	addl	%ecx,%edx
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	addl	$0x0400,%edx  # add lower 1 MB - its not count by e801 method
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	addl	$0x0400,%edx  # add lower 1 MB - it's not included by e801 method
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	movl	%edx,(e801memorysize)
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	movl	%edx,e801memorysize
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e801end:
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e801end:
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	ret
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	ret
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	#memory size in 1 kb chunks
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	#memory size in 1 kb chunks
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e801memorysize:
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e801memorysize: