125 lines
2.9 KiB
NASM
125 lines
2.9 KiB
NASM
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times 442 - ($-$$) db 0
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db "####"
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times 446 - ($-$$) db 0
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mbr_table:
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.part_1:
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db 0x80 ; bootable flag
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db 0, 2, 0 ; CHS - start-address (ordering: cylinder, sector, header)
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db 0x9d
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db 0, 16, 0 ; CHS - end-address (ordering: cylinder, sector, header)
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dd 2
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dd 16
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.part_2:
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db 0x00 ; bootable flag
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db 0, 0, 0 ; CHS - start-address (ordering: cylinder, sector, header)
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db 0x0
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db 0, 0, 0 ; CHS - end-address (ordering: cylinder, sector, header)
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dd 0
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dd 0
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.part_3:
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db 0x00 ; bootable flag
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db 0, 0, 0 ; CHS - start-address (ordering: cylinder, sector, header)
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db 0x00
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db 0, 0, 0 ; CHS - end-address (ordering: cylinder, sector, header)
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dd 0
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dd 0
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.part_4:
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db 0x00 ; bootable flag
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db 0, 0, 0 ; CHS - start-address (ordering: cylinder, sector, header)
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db 0x00
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db 0, 0, 0 ; CHS - end-address (ordering: cylinder, sector, header)
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dd 0
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dd 0
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.signature:
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db 0x55, 0xaa
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second_stage:
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;mov si, finish_text
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;mov dl, 36
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;mov dh, 12
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;mov cx, 8
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; set the video mode correctly
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xor ah, ah ; bios-function (set video mode)
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mov al, 3 ; video mode with 80x25 characters
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int 0x10
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.happiness:
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mov ah, 0x02 ; action: move cursor
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mov bh, 0 ; page
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mov dh, 1 ; row
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mov dl, 1 ; column
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int 0x10
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mov ah, 0x0a ; action: write character
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mov al, '$' ; character
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mov bh, 0 ; page
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mov cx, 13 ; count
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int 10h
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jmp .happiness
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.prolog:
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push di
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push cx
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push bx
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push ax
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xor di, di ; character index
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.printing_loop:
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.set_cursor_position:
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.write_character:
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push cx ; save len_buffer
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; get the current character
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mov bx, si
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add bx, di
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mov al, [bx]
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; al now contains the current character
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; set the other needed interrupt values
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mov ah, 0x0a ; wanted function (write character at cursor position)
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mov bh, 0 ; page number
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mov cx, 1 ; repetitions of character
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int 0x10 ; call bios basic draw functions
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pop cx ; restore len_buffer
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inc dl ; go to next column
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; go to a new line if needed
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cmp dl, 80
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jb .no_new_line_needed
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xor dl, dl
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inc dh ; increase column
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.no_new_line_needed:
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inc di ; go to next character
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; go further if the string-printing hasn't been finished
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cmp di, cx
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jb .printing_loop
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.epilog:
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jmp .epilog
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finish_text:
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db "-FINISH-"
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