Subversion Repositories Kolibri OS

align 4

init_BIOS32:

           mov edi, 0xE0000

.pcibios_nxt:

           cmp dword[edi], '_32_' ; "magic" word

           je .BIOS32_found

.pcibios_nxt2:

           add edi, 0x10

           cmp edi, 0xFFFF0

           je .BIOS32_not_found

           jmp .pcibios_nxt

.BIOS32_found:			; magic word found, check control summ

           movzx ecx, byte[edi + 9]

           shl ecx, 4

           mov esi, edi

           xor eax, eax

           cld   ; paranoia

@@:	lodsb

           add ah, al

           loop @b

           jnz .pcibios_nxt2 ; control summ must be zero

    ; BIOS32 service found !

           mov ebp, [edi + 4]

           mov [bios32_entry], ebp

    ; check PCI BIOS present

           mov eax, '$PCI'

           xor ebx, ebx

           push cs  ; special for 'ret far' from  BIOS

           call ebp

           test al, al

           jnz .PCI_BIOS32_not_found

 ; çäåñü ñîçäàþòñÿ äèñêðèïòîðû äëÿ PCI BIOS

           add ebx, OS_BASE

           dec ecx

           mov [(pci_code_32-OS_BASE)], cx    ;limit 0-15

           mov [(pci_data_32-OS_BASE)], cx    ;limit 0-15

           mov [(pci_code_32-OS_BASE)+2], bx  ;base  0-15

           mov [(pci_data_32-OS_BASE)+2], bx  ;base  0-15

           shr ebx, 16

           mov [(pci_code_32-OS_BASE)+4], bl  ;base  16-23

           mov [(pci_data_32-OS_BASE)+4], bl  ;base  16-23

           shr ecx, 16

           and cl, 0x0F

           mov ch, bh

           add cx, D32

           mov [(pci_code_32-OS_BASE)+6], cx  ;lim   16-19 &

           mov [(pci_data_32-OS_BASE)+6], cx  ;base  24-31

           mov [(pci_bios_entry-OS_BASE)], edx

         ; jmp .end

.PCI_BIOS32_not_found:

	; çäåñü äîëæíà çàïîëíÿòñÿ pci_emu_dat

.BIOS32_not_found:

.end: