;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; ;; ;; 16 BIT ENTRY FROM BOOTSECTOR ;; ;; ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; include 'macros.inc' include 'struct.inc' include 'lang.inc' include 'encoding.inc' include 'const.inc' os_code = code_l - tmp_gdt PREBOOT_TIMEOUT = 5 ; seconds use16 org 0x0 jmp start_of_code if lang eq sp include "kernelsp.inc" ; spanish kernel messages else if lang eq et version db 'Kolibri OS versioon 0.7.7.0+ ',13,10,13,10,0 else version db 'Kolibri OS version 0.7.7.0+ ',13,10,13,10,0 end if include "boot/bootstr.inc" ; language-independent boot messages include "boot/preboot.inc" if lang eq ge include "boot/bootge.inc" ; german system boot messages else if lang eq sp include "boot/bootsp.inc" ; spanish system boot messages else if lang eq ru include "boot/bootru.inc" ; russian system boot messages include "boot/ru.inc" ; Russian font else if lang eq et include "boot/bootet.inc" ; estonian system boot messages include "boot/et.inc" ; Estonian font else include "boot/booten.inc" ; english system boot messages end if include "boot/bootcode.inc" ; 16 bit system boot code include "bus/pci/pci16.inc" include "detect/biosdisk.inc" ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; ;; ;; SWITCH TO 32 BIT PROTECTED MODE ;; ;; ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ; CR0 Flags - Protected mode and Paging mov ecx, CR0_PE+CR0_AM ; Enabling 32 bit protected mode sidt [cs:old_ints_h] cli ; disable all irqs cld mov al, 255 ; mask all irqs out 0xa1, al out 0x21, al l.5: in al, 0x64 ; Enable A20 test al, 2 jnz l.5 mov al, 0xD1 out 0x64, al l.6: in al, 0x64 test al, 2 jnz l.6 mov al, 0xDF out 0x60, al l.7: in al, 0x64 test al, 2 jnz l.7 mov al, 0xFF out 0x64, al lgdt [cs:tmp_gdt] ; Load GDT mov eax, cr0 ; protected mode or eax, ecx and eax, 10011111b *65536*256 + 0xffffff ; caching enabled mov cr0, eax jmp pword os_code:B32 ; jmp to enable 32 bit mode align 8 tmp_gdt: dw 23 dd tmp_gdt+0x10000 dw 0 code_l: dw 0xffff dw 0x0000 db 0x00 dw 11011111b *256 +10011010b db 0x00 dw 0xffff dw 0x0000 db 0x00 dw 11011111b *256 +10010010b db 0x00 include "data16.inc" if ~ lang eq sp diff16 "end of bootcode",0,$+0x10000 end if use32 org $+0x10000 align 4 B32: