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Rev | Author | Line No. | Line |
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2783 | clevermous | 1 | ; |
2 | ; MenuesOS Boot Loader |
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3 | ; |
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4 | ; Author: Trans |
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5 | ; Date: 14.02.03 |
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6 | ; Version: 1.0 |
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7 | ; |
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8 | ; Current Version: 1.1 |
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9 | ; Date of modification: 11.06.03 |
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10 | ; |
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11 | ; Compile with FASM |
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12 | ; |
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13 | |||
14 | ;--------Code------------ |
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15 | org 100h |
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16 | |||
17 | start: |
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18 | push cs |
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19 | pop ds |
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20 | mov ax,0003h |
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21 | int 10h |
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22 | |||
23 | mov dx,title |
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24 | call print |
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25 | mov dx,title_1 |
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26 | call print |
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27 | ; mov dx,mes1 |
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28 | ; call print |
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29 | |||
30 | ;-------open Msetup.exe-------------- |
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31 | mov dx,img0 |
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32 | call file_open |
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33 | cmp ax,00h |
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34 | je loader_next_file_search_0 |
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35 | mov [handle],ax |
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36 | mov [foffset],dword 00h |
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37 | jmp loader_continue |
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38 | loader_next_file_search_0: |
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39 | mov dx,img1 |
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40 | call file_open |
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41 | cmp ax,00h |
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42 | je loader_next_file_search_00 |
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43 | mov [handle],ax |
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44 | jmp loader_continue |
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45 | loader_next_file_search_00: |
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46 | mov dx,img2 |
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47 | call file_open |
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48 | cmp ax,00h |
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49 | je loader_next_file_search_01 |
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50 | mov [handle],ax |
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51 | mov [foffset],dword 00h |
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52 | jmp loader_continue |
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53 | loader_next_file_search_01: |
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54 | mov dx,img3 |
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55 | call file_open |
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56 | cmp ax,00h |
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57 | je loader_not_find_file |
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58 | mov [handle],ax |
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59 | mov [foffset],dword 00h |
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60 | loader_continue: |
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61 | |||
62 | ;******* Load IMAGE in memory*************************************************** |
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63 | mov dx,start_img_read |
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64 | call print |
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65 | |||
66 | mov bx,ax |
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67 | xor cx,cx ; cx:dx - offset in bytes (cx*65535+dx) |
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68 | xor edx,edx |
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69 | call file_offset |
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70 | mov [image_counter],0 |
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71 | @@_1: |
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72 | mov bx,[handle] |
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73 | mov dx,buffer ;ds:dx - buffer |
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74 | mov cx,512*96 |
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75 | call file_read |
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76 | |||
77 | push fs |
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78 | xor ax,ax ;AX = 0 |
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79 | mov fs,ax ;DS = AX = 0 ..Èñïîëüçóåò ËÈÍÅÉÍÎÅ ÀÄÐÅÑÎÂÀÍÈÅ! |
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80 | mov ecx,512*96 |
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81 | mov si,buffer |
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82 | movzx edi,[image_counter] |
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83 | imul edi,48*1024 |
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84 | add edi,0x100000 |
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85 | @@: |
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86 | mov al,[si] |
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87 | mov [fs:edi],al |
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88 | inc edi |
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89 | inc esi |
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90 | loop @b |
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91 | pop fs |
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92 | |||
93 | mov dx,progress_img_read |
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94 | call print |
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95 | |||
96 | inc [image_counter] |
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97 | mov bx,[handle] ;ax |
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98 | movzx edx,[image_counter] |
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99 | imul edx,48*1024 |
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100 | mov ecx,edx |
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101 | shr ecx,16 |
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102 | call file_offset |
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103 | cmp [image_counter],30 |
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104 | jne @@_1 |
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105 | |||
106 | mov dx,end_img_read |
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107 | call print |
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108 | |||
109 | mov dx,start_kernel_read |
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110 | call print |
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111 | ;******************************************************************************* |
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112 | ;-------Move pointer to boot-sector-- |
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113 | mov bx,[handle] ;ax |
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114 | xor cx,cx |
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115 | mov edx,[foffset] |
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116 | call file_offset |
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117 | |||
118 | ;---------Read boot-sector----------- |
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119 | mov bx,[handle] |
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120 | mov dx,buffer |
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121 | mov cx,512 |
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122 | call file_read |
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123 | |||
124 | ;--------Read parametrs-------------- |
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125 | mov ax,[buffer+0bh] |
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126 | mov [SectSize],ax |
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127 | mov al,[buffer+0dh] |
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128 | mov [ClustSect],al |
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129 | mov ax,[buffer+0eh] |
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130 | mov [ResSect],ax |
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131 | add ax,[ResRgn] |
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132 | mov [FATRgn],ax |
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133 | mov al,[buffer+10h] |
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134 | mov [FATCnt],al |
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135 | xor bx,bx |
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136 | mov bl,al |
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137 | mov ax,[buffer+11h] |
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138 | mov [RootEnt],ax |
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139 | shr ax,4 ; ax=ax*32/512 |
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140 | mov [RootDirRgnSz],ax |
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141 | mov ax,[buffer+16h] |
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142 | mov [FATSect],ax |
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143 | mul bx |
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144 | mov [FATRgnSz],ax |
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145 | add ax,[FATRgn] |
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146 | mov [RootDirRgn],ax |
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147 | add ax,[RootDirRgnSz] |
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148 | mov [DataRgn],ax |
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149 | |||
150 | ;------Read FATs and RootDir--------- |
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151 | xor eax,eax |
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152 | xor edx,edx |
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153 | mov ax,[FATRgn] |
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154 | mul [SectSize] |
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155 | add eax,[foffset] |
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156 | mov cx,dx |
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157 | mov dx,ax |
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158 | mov bx,[handle] |
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159 | call file_offset |
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160 | mov ax,[FATRgnSz] |
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161 | mul [SectSize] |
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162 | mov cx,ax |
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163 | mov dx,buffer |
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164 | mov bx,[handle] |
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165 | call file_read |
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166 | mov cx,[RootEnt] |
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167 | shl cx,5 |
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168 | mov dx,Root |
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169 | mov bx,[handle] |
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170 | call file_read |
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171 | |||
172 | ;-------Search entry pointer in RootDir--------- |
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173 | push ds |
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174 | pop es |
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175 | mov cx,[RootEnt] |
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176 | mov bx,Root |
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177 | loader_loc_00: |
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178 | push cx |
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179 | mov cx,11 |
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180 | mov di,bx |
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181 | mov si,kernel |
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182 | repe cmpsb |
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183 | jnz loader_notfound |
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184 | pop cx |
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185 | jmp loader_find |
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186 | loader_notfound: |
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187 | pop cx |
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188 | add bx,32 |
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189 | loop loader_loc_00 |
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190 | loader_find: |
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191 | |||
192 | mov ax,[bx+1ah] |
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193 | mov [FirstClust],ax |
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194 | mov eax,[bx+1ch] |
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195 | mov [filesize],eax |
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196 | |||
197 | ;------Read Kernel---------------------- |
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198 | call read_kernel |
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199 | |||
200 | ;--------------------------------------- |
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201 | |||
202 | mov bx,[handle] |
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203 | call file_close |
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204 | ;;;;;;;;;;;;;;;;;;;;;; |
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205 | jmp loader_yes |
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206 | ;;;;;;;;;;;;;;;;;;;;;; |
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207 | ; mov dx,mes2 |
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208 | ; call print |
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209 | ;loader_key: |
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210 | ; mov ah,00h |
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211 | ; int 16h |
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212 | ; cmp al,1bh ;ESC |
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213 | ; je loader_no |
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214 | ; cmp al,6eh ;'n' |
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215 | ; je loader_no |
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216 | ; cmp al,4eh ;'N' |
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217 | ; je loader_no |
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218 | ; cmp al,79h ;'y' |
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219 | ; je loader_yes |
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220 | ; cmp al,59h ;'Y' |
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221 | ; je loader_yes |
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222 | ; jmp loader_key |
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223 | |||
224 | loader_not_find_file: |
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225 | mov dx,mes4 |
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226 | call print |
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227 | jmp loader_exit |
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228 | |||
229 | loader_yes: |
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230 | mov dx,yes |
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231 | call print |
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232 | mov ax,7000h |
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233 | mov es,ax |
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234 | mov si,move_kernel |
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235 | xor di,di |
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236 | mov cx,len_mk |
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237 | rep movsb |
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238 | jmp far 7000h:0000h |
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239 | ; jmp loader_exit |
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240 | loader_no: |
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241 | mov dx,no |
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242 | call print |
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243 | |||
244 | loader_exit: |
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245 | mov dx,mes3 |
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246 | call print |
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247 | retn |
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248 | ;----Subprogramms-------- |
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249 | |||
250 | print: |
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251 | ; in: dx - offset of ASCII string |
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252 | ; out: |
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253 | mov ah,09h |
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254 | int 21h |
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255 | retn |
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256 | |||
257 | file_open: |
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258 | ; in: ds:dx - offset of ASCIIZ filename string |
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259 | ; out: ax - file handle (ax=0 - not found) |
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260 | mov ax,3d00h |
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261 | int 21h |
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262 | jnc fo_exit |
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263 | xor ax,ax |
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264 | fo_exit: |
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265 | retn |
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266 | |||
267 | file_close: |
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268 | ; in: bx - file handle |
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269 | ; out: |
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270 | mov ah,3eh |
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271 | int 21h |
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272 | retn |
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273 | |||
274 | file_read: |
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275 | ; in: bx - file handle |
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276 | ; ds:dx - buffer |
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277 | ; cx - numbers of bytes |
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278 | ; out: |
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279 | mov ah,3fh |
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280 | int 21h |
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281 | retn |
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282 | |||
283 | file_offset: |
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284 | ; in: bx - file handle |
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285 | ; cx:dx - offset in bytes (cx*65535+dx) |
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286 | ; out: |
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287 | mov ax,4200h |
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288 | int 21h |
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289 | retn |
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290 | |||
291 | sector_find: |
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292 | ; in: ax - No of Cluster |
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293 | ; out: ax - 1st sector of Cluster |
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294 | dec ax |
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295 | dec ax |
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296 | push bx |
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297 | xor bx,bx |
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298 | mov bl,[ClustSect] |
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299 | mul bx |
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300 | pop bx |
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301 | add ax,[DataRgn] |
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302 | retn |
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303 | |||
304 | read_cluster: |
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305 | ; in: ax - No of Cluster |
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306 | ; ds:dx - buffer |
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307 | ; out: |
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308 | push dx |
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309 | call sector_find |
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310 | push ax |
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311 | xor eax,eax |
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312 | xor ebx,ebx |
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313 | pop ax |
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314 | mov bx,[SectSize] |
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315 | mul ebx |
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316 | add eax,[foffset] |
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317 | mov dx,ax |
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318 | shr eax,16 |
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319 | mov cx,ax |
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320 | mov bx,[handle] |
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321 | call file_offset |
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322 | xor ax,ax |
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323 | mov al,[ClustSect] |
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324 | mul [SectSize] |
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325 | mov cx,ax |
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326 | mov bx,[handle] |
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327 | pop dx |
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328 | call file_read |
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329 | retn |
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330 | |||
331 | read_kernel: |
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332 | ; in: |
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333 | ; out: |
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334 | mov ax,8000h |
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335 | mov es,ax ;8000:0000 = 80000h - Temporal location of kernel |
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336 | xor di,di ; |
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337 | mov ax,[FirstClust] |
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338 | mov bp,ax |
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339 | rk_loc_00: |
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340 | push es |
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341 | mov dx,Root |
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342 | call read_cluster |
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343 | xor ax,ax ; Moving cluster to area of location kernel |
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344 | mov al,[ClustSect] ; |
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345 | mul [SectSize] ; |
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346 | mov cx,ax ; |
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347 | pop es ; |
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348 | mov si,Root ; |
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349 | rep movsb ; |
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350 | cmp di,00h |
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351 | jne rk_continue |
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352 | mov ax,es |
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353 | add ax,1000h |
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354 | mov es,ax |
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355 | rk_continue: |
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356 | mov ax,bp |
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357 | cmp ax,0ff8h |
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358 | jae rk_done |
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359 | shl ax,1 ; Val=Clustrer*1,5 //(Cluster*3)/2 |
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360 | add ax,bp ; |
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361 | shr ax,1 ; |
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362 | mov bx,ax |
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363 | add bx,buffer |
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364 | mov ax,[bx] |
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365 | bt bp,0 |
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366 | jc rk_nechet |
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367 | and ax,0fffh |
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368 | jmp rk_chet |
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369 | rk_nechet: |
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370 | shr ax,4 |
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371 | rk_chet: |
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372 | mov bp,ax |
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373 | jmp rk_loc_00 |
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374 | rk_done: |
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375 | retn |
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376 | |||
377 | move_kernel: |
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378 | ; in: |
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379 | ; out: |
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380 | mov ax,8000h |
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381 | mov ds,ax |
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382 | mov ax,1000h |
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383 | mov es,ax |
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384 | xor si,si |
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385 | xor di,di |
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386 | mov cx,8000h |
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387 | rep movsb |
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388 | mov cx,8000h |
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389 | rep movsb |
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390 | mov bx,es |
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391 | add bx,1000h |
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392 | mov es,bx |
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393 | mov bx,ds |
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394 | add bx,1000h |
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395 | mov ds,bx |
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396 | mov cx,8000h |
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397 | rep movsb |
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398 | mov cx,8000h |
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399 | rep movsb |
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400 | mov ax,1000h |
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401 | mov ds,ax |
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402 | mov es,ax |
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403 | jmp far 1000h:0000h |
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404 | retn |
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405 | len_mk=$-move_kernel |
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406 | |||
407 | ;--------Data------------ |
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408 | title db 'KolibriOS\MenuetOS Boot Loader. Ver.1.2 Copyright(C) 2003, Trans.',0ah,0dh,0ah,0dh,'$' |
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409 | title_1 db 'Addition 2005-2006 by Mario79 - for boot Flash RAM.',0ah,0dh,0ah,0dh,'$' |
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410 | ;mes1 db 'It is alternative of boot from floppy.',0ah,0dh |
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411 | ; db 'You MUST select HD booting !!!',0ah,0dh,0ah,0dh,'$' |
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412 | ;mes2 db 'Are you sure loading MeOS? (Y/N):','$' |
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413 | start_img_read db 'Read IMG file: ','$' |
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414 | progress_img_read db '#','$' |
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415 | end_img_read db 0ah,0dh,0ah,0dh,'$' |
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416 | start_kernel_read db 'Start kernel read ','$' |
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417 | yes db 'Y','$' |
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418 | no db 'N','$' |
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419 | mes3 db 0ah,0dh,0ah,0dh,'See you later ...',0ah,0dh,'$' |
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420 | mes4 db 0ah,0dh,0ah,0dh,'Not Found: ' |
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421 | img0 db 'kolibri\kolibri.img',0,', ' |
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422 | img1 db 'msetup.exe',0,', ' |
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423 | img2 db 'menuet.img',0,', ' |
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424 | img3 db 'kolibri.img',0,' :($' |
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425 | image_counter db 0 |
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426 | kernel db 'KERNEL MNT',0 |
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427 | handle dw ? |
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428 | foffset dd 20480 |
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429 | SectSize dw ? ; +0bh |
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430 | ClustSect db ? ; +0dh |
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431 | ResSect dw ? ; +0eh |
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432 | FATCnt db ? ; +10h |
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433 | RootEnt dw ? ; +11h |
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434 | FATSect dw ? ; +16h |
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435 | filesize dd ? ; +1ch |
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436 | FirstClust dw ? ; +1ah |
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437 | |||
438 | ResRgn dw 0 ; = VolumeStart |
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439 | FATRgn dw ? ; = ResRgn+ResSect |
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440 | RootDirRgn dw ? ; = FATRgn+(FATCnt*FATSect) |
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441 | DataRgn dw ? ; = RootDirRgn+((RootEnt*32)/SectSize) |
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442 | ResRgnSz dw ? ; = ResSect |
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443 | FATRgnSz dw ? ; = FATCnt*FATSect |
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444 | RootDirRgnSz dw ? ; = (RootEnt*32)/SectSize |
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445 | ;First sector of cluster N = DataRgn+((N-2)*ClustSect) |
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446 | buffer: |
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447 | org 3000h |
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448 | Root: |
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449 |