60 lines
758 B
NASM
60 lines
758 B
NASM
%include "../common/multiboot_header.asm"
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%include "../common/x86_vram.asm"
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extern c_entry
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extern print_int
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section .bss
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stack resb 0x1000
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section .data
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keyboard_scancode db 0
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[bits 32]
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section .text
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global boot:
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mov esp, stack + 0x1000
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xor ebp, ebp
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jmp main
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main:
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push word BG.BLACK | ' '
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call clear
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add esp, 2
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call c_entry
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.loop:
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call scan
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test al, al
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jz .loop
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push 22
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push eax
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call print_int
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add esp, 8
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jmp .loop
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halt:
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hlt
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jmp halt
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scan:
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xor eax, eax
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in al, 0x60
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cmp al, [keyboard_scancode]
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je .zero
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mov [keyboard_scancode], al
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ret
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.zero:
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xor al, al
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ret
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%include "../common/x86_vram_functions.asm"
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