28 lines
1021 B
ArmAsm
28 lines
1021 B
ArmAsm
[bits 16] ; 16 bit real mode code
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[org 0x7C00] ; Origin at 0x7C00 (upper end of memory)
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mov si, _str_hello ; si = source index
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call printString
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jmp $ ; hang forever
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printCharacter: ; print a single character to the display
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mov ah, 0x0e ; int 0x10 is the entire display control,
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; 0x0e means teletype output
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mov bh, 0x00 ; Print on the zero (primary) page
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mov bl, 0x07 ; Color. 0x07 is grey on black.
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int 0x10
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ret
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printString: ; print the entire string pointed to by si
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mov al, [si] ; [x] == *x, dereferencing source index
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call printCharacter
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inc si
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cmp al, 0x0 ; found the trailing NULL?
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jne printString
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ret
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_str_hello db 'Piquant v0.1 Bootloader', 0 ; String + trailing NULL
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times 510 - ($ - $$) db 0 ; fill up to 510 bytes with 0
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dw 0xAA55 ; magic bootloader signature
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