kolibrios/kernel/branches/Kolibri-A/trunk/boot/rdload.inc

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;                                                              ;;
;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License    ;;
;;                                                              ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

$Revision$


; READ RAMDISK IMAGE FROM HD

	cmp   [boot_dev+OS_BASE+0x10000],1
;	jne   no_sys_on_hd

	test  [DRIVE_DATA+1],byte 0x40
	jz    position_2
	mov   [hdbase],0x1f0
	mov   [hdid],0x0
	mov   [hdpos],1
	mov   [fat32part], 0
  position_1_1:
	inc   [fat32part]
	call  search_and_read_image
	cmp   [image_retrieved],1
	je    yes_sys_on_hd
	movzx eax,byte [DRIVE_DATA+2]
	cmp   [fat32part],eax
	jle	position_1_1
  position_2:
	test  [DRIVE_DATA+1],byte 0x10
	jz    position_3
	mov   [hdbase],0x1f0
	mov   [hdid],0x10
	mov   [hdpos],2
	mov   [fat32part],0
  position_2_1:
	inc   [fat32part]
	call  search_and_read_image
	cmp   [image_retrieved],1
	je    yes_sys_on_hd
	movzx eax,byte [DRIVE_DATA+3]
	cmp   eax,[fat32part]
	jle	position_2_1
  position_3:
	test  [DRIVE_DATA+1],byte 0x4
	jz    position_4
	mov   [hdbase],0x170
	mov   [hdid],0x0
	mov   [hdpos],3
	mov   [fat32part],0
  position_3_1:
	inc   [fat32part]
	call  search_and_read_image
	cmp   [image_retrieved],1
	je    yes_sys_on_hd
	movzx eax,byte [DRIVE_DATA+4]
	cmp   eax,[fat32part]
	jle	position_3_1
  position_4:
	test  [DRIVE_DATA+1],byte 0x1
	jz    no_sys_on_hd
	mov   [hdbase],0x170
	mov   [hdid],0x10
	mov   [hdpos],4
	mov   [fat32part],0
  position_4_1:
	inc   [fat32part]
	call  search_and_read_image
	cmp   [image_retrieved],1
	je    yes_sys_on_hd
	movzx eax,byte [DRIVE_DATA+5]
	cmp   eax,[fat32part]
	jle	position_4_1
	jmp   yes_sys_on_hd

  search_and_read_image:
	call  set_FAT32_variables
	mov   edx, bootpath
	call  read_image
	test  eax, eax
	jz   image_present
	mov   edx, bootpath2
	call  read_image
	test  eax, eax
	jz   image_present
	ret
    image_present:
	mov   [image_retrieved],1
	ret

read_image:
	mov   eax, hdsysimage+OS_BASE+0x10000
	mov   ebx, 1474560/512
	mov   ecx, RAMDISK
	mov   esi, 0
	mov   edi, 12
	call  file_read
	ret

image_retrieved  db 0
counter_of_partitions db 0
no_sys_on_hd:
	; test_to_format_ram_disk (need if not using ram disk)
	cmp   [boot_dev+OS_BASE+0x10000],3
	jne not_format_ram_disk
	; format_ram_disk
	mov edi, RAMDISK
	mov ecx, 0x1080
	xor eax,eax
@@:
		stosd
	loop @b

	mov ecx, 0x58F7F
	mov eax,0xF6F6F6F6
@@:
		stosd
	loop @b

	mov [RAMDISK+0x200],dword 0xFFFFF0		; fat table
	mov [RAMDISK+0x4200],dword 0xFFFFF0

not_format_ram_disk:
yes_sys_on_hd: