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[org 0x7E00]
%define PAGETABLE 0x1000
%define VESAINFO 0x0500
%define VESAMODE VESAINFO+512
%define OWNMODE VESAMODE+256
%define GFXINFO PAGETABLE-10
;%define MEMMAPCNT GFXINFO-2
%define MEMMAP 0x500
setup:
; print message
mov ebx, .msg
call print_str
; setup VESA
call vesa
; get extended memory map
call mmap
; build page table
call paging
; jump into long mode
jmp 0x0008:long_mode
.msg:
db 10, 13, "nyax stage2", 10, 13, 0
%include "stage2/vesa.asm"
%include "stage2/mmap.asm"
%include "stage2/paging.asm"
%include "stage1/print.asm"
; modify eax, ebx, ecx, edx
print_hex:
mov ebx, 0x10
jmp print_num
print_dec:
mov ebx, 10
print_num:
xor ecx, ecx
.convert:
inc ecx
xor edx, edx
div ebx
cmp dl, 10
jb .digit
add dl, 'A'-10
jmp .next
.digit:
add dl, '0'
.next:
push dx
cmp eax, 0
jne .convert
.print:
cmp ecx, 0
je .return
dec ecx
pop ax
mov ah, 0x0E
int 0x10
jmp .print
.return:
ret
newline:
mov al, 10
call print_chr
mov al, 13
call print_chr
ret
print_chr:
mov ah, 0x0E
int 0x10
ret
[bits 64]
long_mode:
; setup segment registers
mov ax, 0x0010
mov ds, ax
mov es, ax
mov fs, ax
mov gs, ax
mov ss, ax
; kernel begins here
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