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Rev | Author | Line No. | Line |
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431 | serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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1508 | art_zh | 3 | ;; Copyright (C) KolibriOS team 2004-2010. All rights reserved. ;; |
431 | serge | 4 | ;; Copyright (C) MenuetOS 2000-2004 Ville Mikael Turjanmaa ;; |
5 | ;; Distributed under terms of the GNU General Public License ;; |
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6 | ;; ;; |
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7 | ;; BOOTCODE.INC ;; |
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8 | ;; ;; |
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9 | ;; KolibriOS 16-bit loader, ;; |
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10 | ;; based on bootcode for MenuetOS ;; |
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11 | ;; ;; |
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12 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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1 | ha | 13 | |
593 | mikedld | 14 | $Revision: 1941 $ |
1 | ha | 15 | |
16 | |||
17 | ;========================================================================== |
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18 | ; |
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19 | ; 16 BIT FUNCTIONS |
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20 | ; |
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21 | ;========================================================================== |
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22 | |||
1941 | art_zh | 23 | if 0 |
29 | halyavin | 24 | putchar: |
25 | ; in: al=character |
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1683 | art_zh | 26 | mov ah, 0Eh |
27 | mov bh, 0 |
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28 | int 10h |
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29 | ret |
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1 | ha | 30 | |
29 | halyavin | 31 | print: |
32 | ; in: si->string |
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1683 | art_zh | 33 | mov al, 186 |
34 | call putchar |
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35 | mov al, ' ' |
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36 | call putchar |
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1 | ha | 37 | |
29 | halyavin | 38 | printplain: |
39 | ; in: si->string |
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1683 | art_zh | 40 | pusha |
41 | lodsb |
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29 | halyavin | 42 | @@: |
1683 | art_zh | 43 | call putchar |
44 | lodsb |
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45 | test al,al |
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46 | jnz @b |
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47 | popa |
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48 | ret |
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1 | ha | 49 | |
50 | |||
29 | halyavin | 51 | setcursor: |
52 | ; in: dl=column, dh=row |
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1683 | art_zh | 53 | mov ah, 2 |
54 | mov bh, 0 |
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55 | int 10h |
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56 | ret |
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29 | halyavin | 57 | |
58 | macro _setcursor row,column |
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59 | { |
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1683 | art_zh | 60 | mov dx, row*256 + column |
61 | call setcursor |
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29 | halyavin | 62 | } |
63 | |||
1941 | art_zh | 64 | end if |
65 | |||
134 | diamond | 66 | boot_read_floppy: |
1683 | art_zh | 67 | push si |
68 | xor si, si |
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69 | mov ah, 2 ; read |
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134 | diamond | 70 | @@: |
1683 | art_zh | 71 | push ax |
72 | int 0x13 |
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73 | pop ax |
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74 | jnc @f |
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75 | inc si |
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76 | cmp si, 10 |
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1703 | art_zh | 77 | jnb $ |
134 | diamond | 78 | @@: |
1683 | art_zh | 79 | pop si |
80 | ret |
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134 | diamond | 81 | |
1703 | art_zh | 82 | sayerr_plain: |
83 | jmp $ |
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84 | |||
85 | sayerr: |
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86 | jmp $ |
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87 | |||
88 | |||
795 | shurf | 89 | ; convert abs. sector number (AX) to BIOS T:H:S |
90 | ; sector number = (abs.sector%BPB_SecPerTrk)+1 |
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91 | ; pre.track number = (abs.sector/BPB_SecPerTrk) |
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92 | ; head number = pre.track number%BPB_NumHeads |
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93 | ; track number = pre.track number/BPB_NumHeads |
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94 | ; Return: cl - sector number |
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95 | ; ch - track number |
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96 | ; dl - drive number (0 = a:) |
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97 | ; dh - head number |
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98 | conv_abs_to_THS: |
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1683 | art_zh | 99 | push bx |
100 | mov bx,word [BPB_SecPerTrk] |
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101 | xor dx,dx |
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102 | div bx |
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103 | inc dx |
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104 | mov cl, dl ; cl = sector number |
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105 | mov bx,word [BPB_NumHeads] |
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106 | xor dx,dx |
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107 | div bx |
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108 | ; !!!!!!! ax = track number, dx = head number |
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109 | mov ch,al ; ch=track number |
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110 | xchg dh,dl ; dh=head number |
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111 | mov dl,0 ; dl=0 (drive 0 (a:)) |
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112 | pop bx |
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113 | retn |
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795 | shurf | 114 | ; needed variables |
1683 | art_zh | 115 | BPB_SecPerTrk dw 0 ; sectors per track |
116 | BPB_NumHeads dw 0 ; number of heads |
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117 | BPB_FATSz16 dw 0 ; size of FAT |
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118 | BPB_RootEntCnt dw 0 ; count of root dir. entries |
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119 | BPB_BytsPerSec dw 0 ; bytes per sector |
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120 | BPB_RsvdSecCnt dw 0 ; number of reserved sectors |
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121 | BPB_TotSec16 dw 0 ; count of the sectors on the volume |
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122 | BPB_SecPerClus db 0 ; number of sectors per cluster |
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123 | BPB_NumFATs db 0 ; number of FAT tables |
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124 | abs_sector_adj dw 0 ; adjustment to make abs. sector number |
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125 | end_of_FAT dw 0 ; end of FAT table |
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126 | FirstDataSector dw 0 ; begin of data |
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795 | shurf | 127 | |
1 | ha | 128 | ;========================================================================= |
129 | ; |
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130 | ; 16 BIT CODE |
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131 | ; |
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132 | ;========================================================================= |
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133 | |||
1683 | art_zh | 134 | include 'bootvesa.inc' ;Include source for boot vesa |
1 | ha | 135 | |
136 | start_of_code: |
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1683 | art_zh | 137 | cld |
29 | halyavin | 138 | ; \begin{diamond}[02.12.2005] |
514 | diamond | 139 | ; if bootloader sets ax = 'KL', then ds:si points to loader block |
1683 | art_zh | 140 | cmp ax, 'KL' |
141 | jnz @f |
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142 | mov word [cs:cfgmanager.loader_block], si |
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143 | mov word [cs:cfgmanager.loader_block+2], ds |
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29 | halyavin | 144 | @@: |
145 | ; \end{diamond}[02.12.2005] |
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1 | ha | 146 | |
514 | diamond | 147 | ; if bootloader sets cx = 'HA' and dx = 'RD', then bx contains identifier of source hard disk |
148 | ; (see comment to bx_from_load) |
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1683 | art_zh | 149 | cmp cx, 'HA' |
150 | jnz no_hd_load |
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151 | cmp dx,'RD' |
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152 | jnz no_hd_load |
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153 | mov word [cs:bx_from_load], bx ; {SPraid}[13.03.2007] |
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488 | spraid | 154 | no_hd_load: |
155 | |||
29 | halyavin | 156 | ; set up stack |
1683 | art_zh | 157 | mov ax, 3000h |
158 | mov ss, ax |
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159 | mov sp, 0EC00h |
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29 | halyavin | 160 | ; set up segment registers |
1683 | art_zh | 161 | push cs |
162 | pop ds |
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163 | push cs |
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164 | pop es |
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1 | ha | 165 | |
29 | halyavin | 166 | ; set videomode |
1683 | art_zh | 167 | mov ax, 3 |
168 | int 0x10 |
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1 | ha | 169 | |
29 | halyavin | 170 | ; draw frames |
1683 | art_zh | 171 | push 0xb800 |
172 | pop es |
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173 | xor di, di |
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174 | mov ah, 1*16+15 |
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465 | serge | 175 | |
1703 | art_zh | 176 | cpugood: |
1 | ha | 177 | |
1683 | art_zh | 178 | push 0 |
179 | popf |
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180 | sti |
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465 | serge | 181 | |
29 | halyavin | 182 | ; set up esp |
1683 | art_zh | 183 | movzx esp, sp |
1 | ha | 184 | |
1683 | art_zh | 185 | push 0 |
186 | pop es |
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187 | and word [es:0x9031], 0 |
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164 | serge | 188 | ; \begin{Mario79} |
189 | ; find HDD IDE DMA PCI device |
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160 | diamond | 190 | ; check for PCI BIOS |
1683 | art_zh | 191 | mov ax, 0xB101 |
192 | int 0x1A |
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193 | jc .nopci |
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194 | cmp edx, 'PCI ' |
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195 | jnz .nopci |
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160 | diamond | 196 | ; find PCI class code |
197 | ; class 1 = mass storage |
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198 | ; subclass 1 = IDE controller |
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199 | ; a) class 1, subclass 1, programming interface 0x80 |
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1683 | art_zh | 200 | mov ax, 0xB103 |
201 | mov ecx, 1*10000h + 1*100h + 0x80 |
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202 | xor si, si ; device index = 0 |
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203 | int 0x1A |
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204 | jnc .found |
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187 | diamond | 205 | ; b) class 1, subclass 1, programming interface 0x8A |
1683 | art_zh | 206 | mov ax, 0xB103 |
207 | mov ecx, 1*10000h + 1*100h + 0x8A |
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208 | xor si, si ; device index = 0 |
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209 | int 0x1A |
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210 | jnc .found |
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187 | diamond | 211 | ; c) class 1, subclass 1, programming interface 0x85 |
1683 | art_zh | 212 | mov ax, 0xB103 |
213 | mov ecx, 1*10000h + 1*100h + 0x85 |
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214 | xor si, si |
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215 | int 0x1A |
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216 | jc .nopci |
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160 | diamond | 217 | .found: |
218 | ; get memory base |
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1683 | art_zh | 219 | mov ax, 0xB10A |
220 | mov di, 0x20 ; memory base is config register at 0x20 |
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221 | int 0x1A |
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222 | jc .nopci |
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223 | and cx, 0xFFF0 ; clear address decode type |
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224 | mov [es:0x9031], cx |
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160 | diamond | 225 | .nopci: |
164 | serge | 226 | ; \end{Mario79} |
160 | diamond | 227 | |
76 | mario79 | 228 | ; --------------- APM --------------------- |
1683 | art_zh | 229 | and word [es:0x9044], 0 ; ver = 0.0 (APM not found) |
230 | mov ax, 0x5300 |
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231 | xor bx, bx |
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232 | int 0x15 |
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233 | jc apm_end ; APM not found |
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234 | test cx, 2 |
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235 | jz apm_end ; APM 32-bit protected-mode interface not supported |
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236 | mov [es:0x9044], ax ; Save APM Version |
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237 | mov [es:0x9046], cx ; Save APM flags |
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164 | serge | 238 | |
1683 | art_zh | 239 | mov ax, 0x5304 ; Disconnect interface |
240 | xor bx, bx |
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241 | int 0x15 |
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242 | mov ax, 0x5303 ; Connect 32 bit mode interface |
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243 | xor bx, bx |
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244 | int 0x15 |
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465 | serge | 245 | |
1683 | art_zh | 246 | mov [es:0x9040], ebx |
247 | mov [es:0x9050], ax |
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248 | mov [es:0x9052], cx |
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249 | mov [es:0x9054], dx |
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465 | serge | 250 | |
76 | mario79 | 251 | apm_end: |
252 | |||
713 | Lrz | 253 | ;CHECK current of code |
1683 | art_zh | 254 | cmp [cfgmanager.loader_block], -1 |
255 | jz noloaderblock |
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256 | les bx, [cfgmanager.loader_block] |
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257 | cmp byte [es:bx], 1 |
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258 | jnz sayerr |
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259 | push 0 |
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260 | pop es |
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713 | Lrz | 261 | |
262 | noloaderblock: |
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1 | ha | 263 | ; DISPLAY VESA INFORMATION |
1683 | art_zh | 264 | call print_vesa_info |
265 | call calc_vmodes_table |
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266 | call check_first_parm ;check and enable cursor_pos |
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1 | ha | 267 | |
29 | halyavin | 268 | ; \begin{diamond}[30.11.2005] |
269 | cfgmanager: |
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270 | ; settings: |
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271 | ; a) preboot_graph = graphical mode |
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272 | ; preboot_gprobe = probe this mode? |
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713 | Lrz | 273 | ; b) preboot_dma = use DMA access? |
29 | halyavin | 274 | ; c) preboot_vrrm = use VRR? |
275 | ; d) preboot_device = from what boot? |
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713 | Lrz | 276 | |
29 | halyavin | 277 | ; determine default settings |
1703 | art_zh | 278 | ; mov [.bSettingsChanged], 0 |
713 | Lrz | 279 | |
280 | ;.preboot_gr_end: |
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1683 | art_zh | 281 | mov di, preboot_device |
726 | diamond | 282 | ; if image in memory is present and [preboot_device] is uninitialized, |
283 | ; set it to use this preloaded image |
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1683 | art_zh | 284 | cmp byte [di], 0 |
285 | jnz .preboot_device_inited |
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286 | cmp [.loader_block], -1 |
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287 | jz @f |
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288 | les bx, [.loader_block] |
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289 | test byte [es:bx+1], 1 |
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290 | jz @f |
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291 | mov byte [di], 3 |
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292 | jmp .preboot_device_inited |
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726 | diamond | 293 | @@: |
294 | ; otherwise, set [preboot_device] to 1 (default value - boot from floppy) |
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1683 | art_zh | 295 | mov byte [di], 1 |
726 | diamond | 296 | .preboot_device_inited: |
1018 | diamond | 297 | ; following 4 lines set variables to 1 if its current value is 0 |
1683 | art_zh | 298 | cmp byte [di+preboot_dma-preboot_device], 1 |
299 | adc byte [di+preboot_dma-preboot_device], 0 |
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300 | cmp byte [di+preboot_biosdisk-preboot_device], 1 |
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301 | adc byte [di+preboot_biosdisk-preboot_device], 0 |
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713 | Lrz | 302 | |
1703 | art_zh | 303 | ; pop ax ; <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< ?? |
304 | jmp .continue |
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143 | diamond | 305 | .loader_block dd -1 |
29 | halyavin | 306 | .continue: |
1683 | art_zh | 307 | sti |
1703 | art_zh | 308 | jmp .load |
946 | lrz | 309 | |
29 | halyavin | 310 | .loadc: |
1683 | art_zh | 311 | pop eax |
29 | halyavin | 312 | .cont: |
1683 | art_zh | 313 | push cs |
314 | pop ds |
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29 | halyavin | 315 | .load: |
1 | ha | 316 | |
317 | ; ASK GRAPHICS MODE |
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318 | |||
1683 | art_zh | 319 | call set_vmode |
1 | ha | 320 | |
321 | ; GRAPHICS ACCELERATION |
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346 | diamond | 322 | ; force yes |
1683 | art_zh | 323 | mov [es:0x901C], byte 1 |
1 | ha | 324 | |
514 | diamond | 325 | ; DMA ACCESS TO HD |
1 | ha | 326 | |
1683 | art_zh | 327 | mov al, [preboot_dma] |
328 | mov [es:0x901F], al |
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346 | diamond | 329 | |
1 | ha | 330 | ; VRR_M USE |
331 | |||
1683 | art_zh | 332 | mov al,[preboot_vrrm] |
333 | mov [es:0x9030], al |
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334 | mov [es:0x901E], byte 1 |
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1 | ha | 335 | |
336 | ; BOOT DEVICE |
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337 | |||
1683 | art_zh | 338 | mov al, [preboot_device] |
339 | dec al |
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340 | mov [boot_dev], al |
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1 | ha | 341 | |
1103 | diamond | 342 | ; GET MEMORY MAP |
343 | include 'detect/biosmem.inc' |
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344 | |||
1 | ha | 345 | ; READ DISKETTE TO MEMORY |
346 | |||
1683 | art_zh | 347 | cmp [boot_dev],0 |
348 | jne no_sys_on_floppy |
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349 | xor ax, ax ; reset drive |
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350 | xor dx, dx |
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351 | int 0x13 |
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709 | diamond | 352 | ; do we boot from CD-ROM? |
1683 | art_zh | 353 | mov ah, 41h |
354 | mov bx, 55AAh |
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355 | xor dx, dx |
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356 | int 0x13 |
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357 | jc .nocd |
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358 | cmp bx, 0AA55h |
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359 | jnz .nocd |
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360 | mov ah, 48h |
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361 | push ds |
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362 | push es |
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363 | pop ds |
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364 | mov si, 0xa000 |
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365 | mov word [si], 30 |
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366 | int 0x13 |
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367 | pop ds |
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368 | jc .nocd |
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369 | push ds |
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370 | lds si, [es:si+26] |
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371 | test byte [ds:si+10], 40h |
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372 | pop ds |
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373 | jz .nocd |
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709 | diamond | 374 | ; yes - read all floppy by 18 sectors |
795 | shurf | 375 | |
376 | ; TODO: !!!! read only first sector and set variables !!!!! |
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377 | ; ... |
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378 | ; TODO: !!! then read flippy image track by track |
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1683 | art_zh | 379 | |
380 | mov cx, 0x0001 ; startcyl,startsector |
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709 | diamond | 381 | .a1: |
1683 | art_zh | 382 | push cx dx |
383 | mov al, 18 |
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384 | mov bx, 0xa000 |
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385 | call boot_read_floppy |
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386 | mov si, movedesc |
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387 | push es |
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388 | push ds |
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389 | pop es |
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390 | mov cx, 256*18 |
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391 | mov ah, 0x87 |
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392 | int 0x15 |
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393 | pop es |
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394 | pop dx cx |
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395 | test ah, ah |
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396 | jnz sayerr_floppy |
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397 | add dword [si+8*3+2], 512*18 |
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398 | inc dh |
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399 | cmp dh, 2 |
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400 | jnz .a1 |
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401 | mov dh, 0 |
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402 | inc ch |
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403 | cmp ch, 80 |
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404 | jae ok_sys_on_floppy |
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405 | mov al, ch |
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406 | shr ch, 2 |
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407 | jmp .a1 |
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709 | diamond | 408 | .nocd: |
409 | ; no - read only used sectors from floppy |
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134 | diamond | 410 | ; now load floppy image to memory |
411 | ; at first load boot sector and first FAT table |
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795 | shurf | 412 | |
413 | ; read only first sector and fill variables |
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1683 | art_zh | 414 | mov cx, 0x0001 ; first logical sector |
415 | xor dx, dx ; head = 0, drive = 0 (a:) |
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416 | mov al, 1 ; read one sector |
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417 | mov bx, 0xB000 ; es:bx -> data area |
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418 | call boot_read_floppy |
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795 | shurf | 419 | ; fill the necessary parameters to work with a floppy |
1683 | art_zh | 420 | mov ax, word [es:bx+24] |
421 | mov word [BPB_SecPerTrk], ax |
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422 | mov ax, word [es:bx+26] |
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423 | mov word [BPB_NumHeads], ax |
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424 | mov ax, word [es:bx+17] |
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425 | mov word [BPB_RootEntCnt], ax |
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426 | mov ax, word [es:bx+14] |
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427 | mov word [BPB_RsvdSecCnt], ax |
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428 | mov ax, word [es:bx+19] |
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429 | mov word [BPB_TotSec16], ax |
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430 | mov al, byte [es:bx+13] |
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431 | mov byte [BPB_SecPerClus], al |
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432 | mov al, byte [es:bx+16] |
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433 | mov byte [BPB_NumFATs], al |
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925 | Lrz | 434 | ; |
1683 | art_zh | 435 | mov ax, word [es:bx+22] |
436 | mov word [BPB_FATSz16], ax |
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437 | mov cx, word [es:bx+11] |
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438 | mov word [BPB_BytsPerSec], cx |
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925 | Lrz | 439 | |
795 | shurf | 440 | ; count of clusters in FAT12 ((size_of_FAT*2)/3) |
925 | Lrz | 441 | ; mov ax, word [BPB_FATSz16] |
442 | ; mov cx, word [BPB_BytsPerSec] |
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443 | ;end |
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1683 | art_zh | 444 | xor dx, dx |
445 | mul cx |
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446 | shl ax, 1 |
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447 | mov cx, 3 |
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448 | div cx ; now ax - number of clusters in FAT12 |
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449 | mov word [end_of_FAT], ax |
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795 | shurf | 450 | |
451 | ; load first FAT table |
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1683 | art_zh | 452 | mov cx, 0x0002 ; startcyl,startsector ; TODO!!!!! |
453 | xor dx, dx ; starthead,drive |
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454 | mov al, byte [BPB_FATSz16] ; no of sectors to read |
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455 | add bx, word [BPB_BytsPerSec] ; es:bx -> data area |
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456 | call boot_read_floppy |
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457 | mov bx, 0xB000 |
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795 | shurf | 458 | |
134 | diamond | 459 | ; and copy them to extended memory |
1683 | art_zh | 460 | mov si, movedesc |
461 | mov [si+8*2+3], bh ; from |
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462 | |||
463 | mov ax, word [BPB_BytsPerSec] |
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464 | shr ax, 1 ; words per sector |
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465 | mov cx, word [BPB_RsvdSecCnt] |
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466 | add cx, word [BPB_FATSz16] |
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467 | mul cx |
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468 | push ax ; save to stack count of words in boot+FAT |
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469 | xchg ax, cx |
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470 | |||
471 | push es |
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472 | push ds |
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473 | pop es |
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474 | mov ah, 0x87 |
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475 | int 0x15 |
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476 | pop es |
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477 | test ah, ah |
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478 | jz @f |
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134 | diamond | 479 | sayerr_floppy: |
1683 | art_zh | 480 | mov dx, 0x3f2 |
481 | mov al, 0 |
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482 | out dx, al |
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1703 | art_zh | 483 | ; mov si, memmovefailed |
484 | jmp $ |
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134 | diamond | 485 | @@: |
1683 | art_zh | 486 | pop ax ; restore from stack count of words in boot+FAT |
487 | shl ax, 1 ; make bytes count from count of words |
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488 | and eax, 0ffffh |
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489 | add dword [si+8*3+2], eax |
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795 | shurf | 490 | |
491 | ; copy first FAT to second copy |
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492 | ; TODO: BPB_NumFATs !!!!! |
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1683 | art_zh | 493 | add bx, word [BPB_BytsPerSec] ; !!! TODO: may be need multiply by BPB_RsvdSecCnt !!! |
494 | mov byte [si+8*2+3], bh ; bx - begin of FAT |
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795 | shurf | 495 | |
1683 | art_zh | 496 | mov ax, word [BPB_BytsPerSec] |
497 | shr ax, 1 ; words per sector |
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498 | mov cx, word [BPB_FATSz16] |
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499 | mul cx |
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500 | mov cx, ax ; cx - count of words in FAT |
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501 | |||
502 | push es |
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503 | push ds |
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504 | pop es |
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505 | mov ah, 0x87 |
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506 | int 0x15 |
||
507 | pop es |
||
508 | test ah, ah |
||
509 | jnz sayerr_floppy |
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510 | |||
511 | mov ax, cx |
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512 | shl ax, 1 |
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513 | and eax, 0ffffh ; ax - count of bytes in FAT |
||
514 | add dword [si+8*3+2], eax |
||
515 | |||
795 | shurf | 516 | ; reading RootDir |
517 | ; TODO: BPB_NumFATs |
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1683 | art_zh | 518 | add bx, ax |
519 | add bx, 100h |
||
520 | and bx, 0ff00h ; bx - place in buffer to write RootDir |
||
521 | push bx |
||
795 | shurf | 522 | |
1683 | art_zh | 523 | mov bx, word [BPB_BytsPerSec] |
524 | shr bx, 5 ; divide bx by 32 |
||
525 | mov ax, word [BPB_RootEntCnt] |
||
526 | xor dx, dx |
||
527 | div bx |
||
528 | push ax ; ax - count of RootDir sectors |
||
795 | shurf | 529 | |
1683 | art_zh | 530 | mov ax, word [BPB_FATSz16] |
531 | xor cx, cx |
||
532 | mov cl, byte [BPB_NumFATs] |
||
533 | mul cx |
||
534 | add ax, word [BPB_RsvdSecCnt] ; ax - first sector of RootDir |
||
795 | shurf | 535 | |
1683 | art_zh | 536 | mov word [FirstDataSector], ax |
537 | pop bx |
||
538 | push bx |
||
539 | add word [FirstDataSector], bx ; Begin of data region of floppy |
||
540 | |||
795 | shurf | 541 | ; read RootDir |
1683 | art_zh | 542 | call conv_abs_to_THS |
543 | pop ax |
||
544 | pop bx ; place in buffer to write |
||
545 | push ax |
||
546 | call boot_read_floppy ; read RootDir into buffer |
||
795 | shurf | 547 | ; copy RootDir |
1683 | art_zh | 548 | mov byte [si+8*2+3], bh ; from buffer |
549 | pop ax ; ax = count of RootDir sectors |
||
550 | mov cx, word [BPB_BytsPerSec] |
||
551 | mul cx |
||
552 | shr ax, 1 |
||
553 | mov cx, ax ; count of words to copy |
||
554 | push es |
||
555 | push ds |
||
556 | pop es |
||
557 | mov ah, 0x87 |
||
558 | int 0x15 |
||
559 | pop es |
||
795 | shurf | 560 | |
1683 | art_zh | 561 | mov ax, cx |
562 | shl ax, 1 |
||
563 | and eax, 0ffffh ; ax - count of bytes in RootDir |
||
564 | add dword [si+8*3+2], eax ; add count of bytes copied |
||
795 | shurf | 565 | |
566 | ; Reading data clusters from floppy |
||
1683 | art_zh | 567 | mov byte [si+8*2+3], bh |
568 | push bx |
||
795 | shurf | 569 | |
1683 | art_zh | 570 | mov di, 2 ; First data cluster |
134 | diamond | 571 | .read_loop: |
1683 | art_zh | 572 | mov bx, di |
573 | shr bx, 1 ; bx+di = di*1.5 |
||
574 | jnc .even |
||
575 | test word [es:bx+di+0xB200], 0xFFF0 ; TODO: may not be 0xB200 !!! |
||
576 | jmp @f |
||
134 | diamond | 577 | .even: |
1683 | art_zh | 578 | test word [es:bx+di+0xB200], 0xFFF ; TODO: may not be 0xB200 !!! |
795 | shurf | 579 | |
134 | diamond | 580 | @@: |
1683 | art_zh | 581 | jz .skip |
795 | shurf | 582 | ; read cluster di |
583 | ;.read: |
||
1683 | art_zh | 584 | ;conv cluster di to abs. sector ax |
585 | ; ax = (N-2) * BPB_SecPerClus + FirstDataSector |
||
586 | mov ax, di |
||
587 | sub ax, 2 |
||
588 | xor bx, bx |
||
589 | mov bl, byte [BPB_SecPerClus] |
||
590 | mul bx |
||
591 | add ax, word [FirstDataSector] |
||
592 | call conv_abs_to_THS |
||
593 | pop bx |
||
594 | push bx |
||
595 | mov al, byte [BPB_SecPerClus] ; number of sectors in cluster |
||
596 | call boot_read_floppy |
||
597 | push es |
||
598 | push ds |
||
599 | pop es |
||
600 | pusha |
||
795 | shurf | 601 | ; |
1683 | art_zh | 602 | mov ax, word [BPB_BytsPerSec] |
603 | xor cx, cx |
||
604 | mov cl, byte [BPB_SecPerClus] |
||
605 | mul cx |
||
606 | shr ax, 1 ; ax = (BPB_BytsPerSec * BPB_SecPerClus)/2 |
||
607 | mov cx, ax ; number of words to copy (count words in cluster) |
||
795 | shurf | 608 | ; |
1683 | art_zh | 609 | mov ah, 0x87 |
610 | int 0x15 ; copy data |
||
611 | test ah, ah |
||
612 | popa |
||
613 | pop es |
||
614 | jnz sayerr_floppy |
||
795 | shurf | 615 | ; skip cluster di |
134 | diamond | 616 | .skip: |
1683 | art_zh | 617 | mov ax, word [BPB_BytsPerSec] |
618 | xor cx, cx |
||
619 | mov cl, byte [BPB_SecPerClus] |
||
620 | mul cx |
||
621 | and eax, 0ffffh ; ax - count of bytes in cluster |
||
622 | add dword [si+8*3+2], eax |
||
795 | shurf | 623 | |
1683 | art_zh | 624 | mov ax, word [end_of_FAT] ; max cluster number |
625 | pusha |
||
134 | diamond | 626 | ; draw percentage |
795 | shurf | 627 | ; total clusters: ax |
628 | ; read clusters: di |
||
1683 | art_zh | 629 | xchg ax, di |
630 | mov cx, 100 |
||
631 | mul cx |
||
632 | div di |
||
633 | aam |
||
634 | xchg al, ah |
||
635 | add ax, '00' |
||
134 | diamond | 636 | @@: |
1683 | art_zh | 637 | popa |
638 | inc di |
||
639 | cmp di, word [end_of_FAT] ; max number of cluster |
||
640 | jnz .read_loop |
||
641 | pop bx ; clear stack |
||
134 | diamond | 642 | |
709 | diamond | 643 | ok_sys_on_floppy: |
514 | diamond | 644 | no_sys_on_floppy: |
1683 | art_zh | 645 | xor ax, ax ; reset drive |
646 | xor dx, dx |
||
647 | int 0x13 |
||
648 | mov dx, 0x3f2 ; floppy motor off |
||
649 | mov al, 0 |
||
650 | out dx, al |
||
1 | ha | 651 | |
652 | |||
653 | ; SET GRAPHICS |
||
654 | |||
1683 | art_zh | 655 | xor ax, ax |
656 | mov es, ax |
||
164 | serge | 657 | |
1683 | art_zh | 658 | mov bx, [es:0x9008] ; vga & 320x200 |
659 | mov ax, 0x4f02 ; Vesa |
||
412 | serge | 660 | setgr: |
1683 | art_zh | 661 | int 0x10 |
662 | test ah, ah |
||
1703 | art_zh | 663 | jnz $ |
412 | serge | 664 | gmok2: |
1683 | art_zh | 665 | push ds |
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