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42 lines
1.2 KiB
ArmAsm
42 lines
1.2 KiB
ArmAsm
; vim: set ft=nasm :
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section .multiboot_header
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MAGIC equ 0xe85250d6
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ARCH equ 0x0
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; Define the multiboot header (multiboot 1.6)
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; http://nongnu.askapache.com/grub/phcoder/multiboot.pdf
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header_start:
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dd MAGIC ; magic number
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dd ARCH ; i386 protected mode
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dd header_end - header_start ; header length
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; The field ‘checksum’ is a 32-bit unsigned value which, when added to the other
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; magic fields (i.e. ‘magic’, ‘architecture’ and ‘header_length’), must have a
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; 32-bit unsigned sum of zero.
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dd (1 << 32) - (MAGIC + ARCH + (header_end - header_start))
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; Console flags tag
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align 8 ; tags should be 64-bit aligned
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dw 4 ; type
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dw 0 ; flags
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dd 12 ; size
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dd 0x3 ; kernel supports EGA console
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; Define graphics mode tag
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;align 8 ; tags should be 64-bit aligned
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;dw 5 ; type
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;dw 0 ; flags
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;dd 20 ; size
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;dd 80 ; width (pixels or chars)
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;dd 25 ; height (pixels or chars)
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;dd 0 ; bpp (0 for text mode
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; According to page 6 of the spec, the tag list is terminated by a tag with
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; type 0 and size 8
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align 8 ; tags should be 64-bit aligned
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dd 0 ; type & flag = 0
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dd 8 ; size
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header_end:
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