22 lines
631 B
NASM
22 lines
631 B
NASM
; boot.asm - prints 'A' and halts
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BITS 16 ; 16-bit real mode
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ORG 0x7C00 ; boot sector load address
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start:
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mov ah, 0x0E ; teletype output BIOS function
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mov al, 'A' ; character to print
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mov bh, 0x00 ; page number 0
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mov bl, 0x07 ; text attribute (light grey on black)
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int 0x10 ; BIOS video interrupt
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cli ; disable interrupts
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hang:
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hlt ; halt CPU
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jmp hang ; infinite loop
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; fill the rest of the sector with zeros
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times 510-($-$$) db 0
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; boot signature (2 bytes)
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dw 0xAA55
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