Rev 1941 | Rev 2014 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
431 | serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
||
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 ;; |
||
6 | ;; ;; |
||
7 | ;; BOOTCODE.INC ;; |
||
8 | ;; ;; |
||
9 | ;; KolibriOS 16-bit loader, ;; |
||
10 | ;; based on bootcode for MenuetOS ;; |
||
11 | ;; ;; |
||
12 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
||
1 | ha | 13 | |
593 | mikedld | 14 | $Revision: 1952 $ |
1 | ha | 15 | |
16 | |||
17 | ;========================================================================== |
||
18 | ; |
||
19 | ; 16 BIT FUNCTIONS |
||
20 | ; |
||
21 | ;========================================================================== |
||
22 | |||
1941 | art_zh | 23 | if 0 |
29 | halyavin | 24 | putchar: |
25 | ; in: al=character |
||
1683 | art_zh | 26 | mov ah, 0Eh |
27 | mov bh, 0 |
||
28 | int 10h |
||
29 | ret |
||
1 | ha | 30 | |
29 | halyavin | 31 | print: |
32 | ; in: si->string |
||
1683 | art_zh | 33 | mov al, 186 |
34 | call putchar |
||
35 | mov al, ' ' |
||
36 | call putchar |
||
1 | ha | 37 | |
29 | halyavin | 38 | printplain: |
39 | ; in: si->string |
||
1683 | art_zh | 40 | pusha |
41 | lodsb |
||
29 | halyavin | 42 | @@: |
1683 | art_zh | 43 | call putchar |
44 | lodsb |
||
45 | test al,al |
||
46 | jnz @b |
||
47 | popa |
||
48 | ret |
||
1 | ha | 49 | |
50 | |||
29 | halyavin | 51 | setcursor: |
52 | ; in: dl=column, dh=row |
||
1683 | art_zh | 53 | mov ah, 2 |
54 | mov bh, 0 |
||
55 | int 10h |
||
56 | ret |
||
29 | halyavin | 57 | |
58 | macro _setcursor row,column |
||
59 | { |
||
1683 | art_zh | 60 | mov dx, row*256 + column |
61 | call setcursor |
||
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 |
||
69 | mov ah, 2 ; read |
||
134 | diamond | 70 | @@: |
1683 | art_zh | 71 | push ax |
72 | int 0x13 |
||
73 | pop ax |
||
74 | jnc @f |
||
75 | inc si |
||
76 | cmp si, 10 |
||
1703 | art_zh | 77 | jnb $ |
134 | diamond | 78 | @@: |
1683 | art_zh | 79 | pop si |
80 | ret |
||
134 | diamond | 81 | |
1703 | art_zh | 82 | sayerr_plain: |
83 | jmp $ |
||
84 | |||
85 | sayerr: |
||
86 | jmp $ |
||
87 | |||
88 | |||
795 | shurf | 89 | ; convert abs. sector number (AX) to BIOS T:H:S |
90 | ; sector number = (abs.sector%BPB_SecPerTrk)+1 |
||
91 | ; pre.track number = (abs.sector/BPB_SecPerTrk) |
||
92 | ; head number = pre.track number%BPB_NumHeads |
||
93 | ; track number = pre.track number/BPB_NumHeads |
||
94 | ; Return: cl - sector number |
||
95 | ; ch - track number |
||
96 | ; dl - drive number (0 = a:) |
||
97 | ; dh - head number |
||
98 | conv_abs_to_THS: |
||
1683 | art_zh | 99 | push bx |
100 | mov bx,word [BPB_SecPerTrk] |
||
101 | xor dx,dx |
||
102 | div bx |
||
103 | inc dx |
||
104 | mov cl, dl ; cl = sector number |
||
105 | mov bx,word [BPB_NumHeads] |
||
106 | xor dx,dx |
||
107 | div bx |
||
108 | ; !!!!!!! ax = track number, dx = head number |
||
109 | mov ch,al ; ch=track number |
||
110 | xchg dh,dl ; dh=head number |
||
111 | mov dl,0 ; dl=0 (drive 0 (a:)) |
||
112 | pop bx |
||
113 | retn |
||
795 | shurf | 114 | ; needed variables |
1683 | art_zh | 115 | BPB_SecPerTrk dw 0 ; sectors per track |
116 | BPB_NumHeads dw 0 ; number of heads |
||
117 | BPB_FATSz16 dw 0 ; size of FAT |
||
118 | BPB_RootEntCnt dw 0 ; count of root dir. entries |
||
119 | BPB_BytsPerSec dw 0 ; bytes per sector |
||
120 | BPB_RsvdSecCnt dw 0 ; number of reserved sectors |
||
121 | BPB_TotSec16 dw 0 ; count of the sectors on the volume |
||
122 | BPB_SecPerClus db 0 ; number of sectors per cluster |
||
123 | BPB_NumFATs db 0 ; number of FAT tables |
||
124 | abs_sector_adj dw 0 ; adjustment to make abs. sector number |
||
125 | end_of_FAT dw 0 ; end of FAT table |
||
126 | FirstDataSector dw 0 ; begin of data |
||
795 | shurf | 127 | |
1 | ha | 128 | ;========================================================================= |
129 | ; |
||
130 | ; 16 BIT CODE |
||
131 | ; |
||
132 | ;========================================================================= |
||
133 | |||
1683 | art_zh | 134 | include 'bootvesa.inc' ;Include source for boot vesa |
1 | ha | 135 | |
136 | start_of_code: |
||
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 |
||
142 | mov word [cs:cfgmanager.loader_block], si |
||
143 | mov word [cs:cfgmanager.loader_block+2], ds |
||
29 | halyavin | 144 | @@: |
145 | ; \end{diamond}[02.12.2005] |
||
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) |
||
1683 | art_zh | 149 | cmp cx, 'HA' |
150 | jnz no_hd_load |
||
151 | cmp dx,'RD' |
||
152 | jnz no_hd_load |
||
153 | mov word [cs:bx_from_load], bx ; {SPraid}[13.03.2007] |
||
488 | spraid | 154 | no_hd_load: |
155 | |||
29 | halyavin | 156 | ; set up stack |
1683 | art_zh | 157 | mov ax, 3000h |
158 | mov ss, ax |
||
159 | mov sp, 0EC00h |
||
29 | halyavin | 160 | ; set up segment registers |
1683 | art_zh | 161 | push cs |
162 | pop ds |
||
163 | push cs |
||
164 | pop es |
||
1 | ha | 165 | |
29 | halyavin | 166 | ; set videomode |
1683 | art_zh | 167 | mov ax, 3 |
168 | int 0x10 |
||
1 | ha | 169 | |
29 | halyavin | 170 | ; draw frames |
1683 | art_zh | 171 | push 0xb800 |
172 | pop es |
||
173 | xor di, di |
||
174 | mov ah, 1*16+15 |
||
465 | serge | 175 | |
1703 | art_zh | 176 | cpugood: |
1 | ha | 177 | |
1683 | art_zh | 178 | push 0 |
179 | popf |
||
180 | sti |
||
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 |
||
187 | and word [es:0x9031], 0 |
||
164 | serge | 188 | ; \begin{Mario79} |
189 | ; find HDD IDE DMA PCI device |
||
160 | diamond | 190 | ; check for PCI BIOS |
1683 | art_zh | 191 | mov ax, 0xB101 |
192 | int 0x1A |
||
193 | jc .nopci |
||
194 | cmp edx, 'PCI ' |
||
195 | jnz .nopci |
||
160 | diamond | 196 | ; find PCI class code |
197 | ; class 1 = mass storage |
||
198 | ; subclass 1 = IDE controller |
||
199 | ; a) class 1, subclass 1, programming interface 0x80 |
||
1683 | art_zh | 200 | mov ax, 0xB103 |
201 | mov ecx, 1*10000h + 1*100h + 0x80 |
||
202 | xor si, si ; device index = 0 |
||
203 | int 0x1A |
||
204 | jnc .found |
||
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 |
||
208 | xor si, si ; device index = 0 |
||
209 | int 0x1A |
||
210 | jnc .found |
||
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 |
||
214 | xor si, si |
||
215 | int 0x1A |
||
216 | jc .nopci |
||
160 | diamond | 217 | .found: |
218 | ; get memory base |
||
1683 | art_zh | 219 | mov ax, 0xB10A |
220 | mov di, 0x20 ; memory base is config register at 0x20 |
||
221 | int 0x1A |
||
222 | jc .nopci |
||
223 | and cx, 0xFFF0 ; clear address decode type |
||
224 | mov [es:0x9031], cx |
||
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 |
||
231 | xor bx, bx |
||
232 | int 0x15 |
||
233 | jc apm_end ; APM not found |
||
234 | test cx, 2 |
||
235 | jz apm_end ; APM 32-bit protected-mode interface not supported |
||
236 | mov [es:0x9044], ax ; Save APM Version |
||
237 | mov [es:0x9046], cx ; Save APM flags |
||
164 | serge | 238 | |
1683 | art_zh | 239 | mov ax, 0x5304 ; Disconnect interface |
240 | xor bx, bx |
||
241 | int 0x15 |
||
242 | mov ax, 0x5303 ; Connect 32 bit mode interface |
||
243 | xor bx, bx |
||
244 | int 0x15 |
||
465 | serge | 245 | |
1683 | art_zh | 246 | mov [es:0x9040], ebx |
247 | mov [es:0x9050], ax |
||
248 | mov [es:0x9052], cx |
||
249 | mov [es:0x9054], dx |
||
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 |
||
256 | les bx, [cfgmanager.loader_block] |
||
257 | cmp byte [es:bx], 1 |
||
258 | jnz sayerr |
||
259 | push 0 |
||
260 | pop es |
||
713 | Lrz | 261 | |
262 | noloaderblock: |
||
1 | ha | 263 | ; DISPLAY VESA INFORMATION |
1683 | art_zh | 264 | call print_vesa_info |
265 | call calc_vmodes_table |
||
266 | call check_first_parm ;check and enable cursor_pos |
||
1 | ha | 267 | |
29 | halyavin | 268 | ; \begin{diamond}[30.11.2005] |
269 | cfgmanager: |
||
270 | ; settings: |
||
271 | ; a) preboot_graph = graphical mode |
||
272 | ; preboot_gprobe = probe this mode? |
||
713 | Lrz | 273 | ; b) preboot_dma = use DMA access? |
29 | halyavin | 274 | ; c) preboot_vrrm = use VRR? |
275 | ; d) preboot_device = from what boot? |
||
713 | Lrz | 276 | |
29 | halyavin | 277 | ; determine default settings |
1703 | art_zh | 278 | ; mov [.bSettingsChanged], 0 |
713 | Lrz | 279 | |
280 | ;.preboot_gr_end: |
||
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 |
||
1683 | art_zh | 284 | cmp byte [di], 0 |
285 | jnz .preboot_device_inited |
||
286 | cmp [.loader_block], -1 |
||
287 | jz @f |
||
288 | les bx, [.loader_block] |
||
289 | test byte [es:bx+1], 1 |
||
290 | jz @f |
||
291 | mov byte [di], 3 |
||
292 | jmp .preboot_device_inited |
||
726 | diamond | 293 | @@: |
294 | ; otherwise, set [preboot_device] to 1 (default value - boot from floppy) |
||
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 |
||
300 | cmp byte [di+preboot_biosdisk-preboot_device], 1 |
||
301 | adc byte [di+preboot_biosdisk-preboot_device], 0 |
||
713 | Lrz | 302 | |
1703 | art_zh | 303 | ; pop ax ; <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< ?? |
304 | jmp .continue |
||
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 |
||
29 | halyavin | 315 | .load: |
1 | ha | 316 | |
317 | ; ASK GRAPHICS MODE |
||
318 | |||
1683 | art_zh | 319 | call set_vmode |
1 | ha | 320 | |
321 | ; GRAPHICS ACCELERATION |
||
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 |
||
346 | diamond | 329 | |
1 | ha | 330 | ; VRR_M USE |
331 | |||
1683 | art_zh | 332 | mov al,[preboot_vrrm] |
333 | mov [es:0x9030], al |
||
334 | mov [es:0x901E], byte 1 |
||
1 | ha | 335 | |
336 | ; BOOT DEVICE |
||
337 | |||
1683 | art_zh | 338 | mov al, [preboot_device] |
339 | dec al |
||
340 | mov [boot_dev], al |
||
1 | ha | 341 | |
1103 | diamond | 342 | ; GET MEMORY MAP |
343 | include 'detect/biosmem.inc' |
||
344 | |||
1 | ha | 345 | ; READ DISKETTE TO MEMORY |
346 | |||
1952 | art_zh | 347 | if 0 |
348 | ---- |
||
1683 | art_zh | 349 | cmp [boot_dev],0 |
350 | jne no_sys_on_floppy |
||
351 | xor ax, ax ; reset drive |
||
352 | xor dx, dx |
||
353 | int 0x13 |
||
709 | diamond | 354 | ; do we boot from CD-ROM? |
1683 | art_zh | 355 | mov ah, 41h |
356 | mov bx, 55AAh |
||
357 | xor dx, dx |
||
358 | int 0x13 |
||
359 | jc .nocd |
||
360 | cmp bx, 0AA55h |
||
361 | jnz .nocd |
||
362 | mov ah, 48h |
||
363 | push ds |
||
364 | push es |
||
365 | pop ds |
||
366 | mov si, 0xa000 |
||
367 | mov word [si], 30 |
||
368 | int 0x13 |
||
369 | pop ds |
||
370 | jc .nocd |
||
371 | push ds |
||
372 | lds si, [es:si+26] |
||
373 | test byte [ds:si+10], 40h |
||
374 | pop ds |
||
375 | jz .nocd |
||
709 | diamond | 376 | ; yes - read all floppy by 18 sectors |
795 | shurf | 377 | |
378 | ; TODO: !!!! read only first sector and set variables !!!!! |
||
379 | ; ... |
||
380 | ; TODO: !!! then read flippy image track by track |
||
1683 | art_zh | 381 | |
382 | mov cx, 0x0001 ; startcyl,startsector |
||
709 | diamond | 383 | .a1: |
1683 | art_zh | 384 | push cx dx |
385 | mov al, 18 |
||
386 | mov bx, 0xa000 |
||
387 | call boot_read_floppy |
||
388 | mov si, movedesc |
||
389 | push es |
||
390 | push ds |
||
391 | pop es |
||
392 | mov cx, 256*18 |
||
393 | mov ah, 0x87 |
||
394 | int 0x15 |
||
395 | pop es |
||
396 | pop dx cx |
||
397 | test ah, ah |
||
398 | jnz sayerr_floppy |
||
399 | add dword [si+8*3+2], 512*18 |
||
400 | inc dh |
||
401 | cmp dh, 2 |
||
402 | jnz .a1 |
||
403 | mov dh, 0 |
||
404 | inc ch |
||
405 | cmp ch, 80 |
||
406 | jae ok_sys_on_floppy |
||
407 | mov al, ch |
||
408 | shr ch, 2 |
||
409 | jmp .a1 |
||
709 | diamond | 410 | .nocd: |
411 | ; no - read only used sectors from floppy |
||
134 | diamond | 412 | ; now load floppy image to memory |
413 | ; at first load boot sector and first FAT table |
||
795 | shurf | 414 | |
415 | ; read only first sector and fill variables |
||
1683 | art_zh | 416 | mov cx, 0x0001 ; first logical sector |
417 | xor dx, dx ; head = 0, drive = 0 (a:) |
||
418 | mov al, 1 ; read one sector |
||
419 | mov bx, 0xB000 ; es:bx -> data area |
||
420 | call boot_read_floppy |
||
795 | shurf | 421 | ; fill the necessary parameters to work with a floppy |
1683 | art_zh | 422 | mov ax, word [es:bx+24] |
423 | mov word [BPB_SecPerTrk], ax |
||
424 | mov ax, word [es:bx+26] |
||
425 | mov word [BPB_NumHeads], ax |
||
426 | mov ax, word [es:bx+17] |
||
427 | mov word [BPB_RootEntCnt], ax |
||
428 | mov ax, word [es:bx+14] |
||
429 | mov word [BPB_RsvdSecCnt], ax |
||
430 | mov ax, word [es:bx+19] |
||
431 | mov word [BPB_TotSec16], ax |
||
432 | mov al, byte [es:bx+13] |
||
433 | mov byte [BPB_SecPerClus], al |
||
434 | mov al, byte [es:bx+16] |
||
435 | mov byte [BPB_NumFATs], al |
||
925 | Lrz | 436 | ; |
1683 | art_zh | 437 | mov ax, word [es:bx+22] |
438 | mov word [BPB_FATSz16], ax |
||
439 | mov cx, word [es:bx+11] |
||
440 | mov word [BPB_BytsPerSec], cx |
||
925 | Lrz | 441 | |
795 | shurf | 442 | ; count of clusters in FAT12 ((size_of_FAT*2)/3) |
925 | Lrz | 443 | ; mov ax, word [BPB_FATSz16] |
444 | ; mov cx, word [BPB_BytsPerSec] |
||
445 | ;end |
||
1683 | art_zh | 446 | xor dx, dx |
447 | mul cx |
||
448 | shl ax, 1 |
||
449 | mov cx, 3 |
||
450 | div cx ; now ax - number of clusters in FAT12 |
||
451 | mov word [end_of_FAT], ax |
||
795 | shurf | 452 | |
453 | ; load first FAT table |
||
1683 | art_zh | 454 | mov cx, 0x0002 ; startcyl,startsector ; TODO!!!!! |
455 | xor dx, dx ; starthead,drive |
||
456 | mov al, byte [BPB_FATSz16] ; no of sectors to read |
||
457 | add bx, word [BPB_BytsPerSec] ; es:bx -> data area |
||
458 | call boot_read_floppy |
||
459 | mov bx, 0xB000 |
||
795 | shurf | 460 | |
134 | diamond | 461 | ; and copy them to extended memory |
1683 | art_zh | 462 | mov si, movedesc |
463 | mov [si+8*2+3], bh ; from |
||
464 | |||
465 | mov ax, word [BPB_BytsPerSec] |
||
466 | shr ax, 1 ; words per sector |
||
467 | mov cx, word [BPB_RsvdSecCnt] |
||
468 | add cx, word [BPB_FATSz16] |
||
469 | mul cx |
||
470 | push ax ; save to stack count of words in boot+FAT |
||
471 | xchg ax, cx |
||
472 | |||
473 | push es |
||
474 | push ds |
||
475 | pop es |
||
476 | mov ah, 0x87 |
||
477 | int 0x15 |
||
478 | pop es |
||
479 | test ah, ah |
||
480 | jz @f |
||
134 | diamond | 481 | sayerr_floppy: |
1683 | art_zh | 482 | mov dx, 0x3f2 |
483 | mov al, 0 |
||
484 | out dx, al |
||
1703 | art_zh | 485 | ; mov si, memmovefailed |
486 | jmp $ |
||
134 | diamond | 487 | @@: |
1683 | art_zh | 488 | pop ax ; restore from stack count of words in boot+FAT |
489 | shl ax, 1 ; make bytes count from count of words |
||
490 | and eax, 0ffffh |
||
491 | add dword [si+8*3+2], eax |
||
795 | shurf | 492 | |
493 | ; copy first FAT to second copy |
||
494 | ; TODO: BPB_NumFATs !!!!! |
||
1683 | art_zh | 495 | add bx, word [BPB_BytsPerSec] ; !!! TODO: may be need multiply by BPB_RsvdSecCnt !!! |
496 | mov byte [si+8*2+3], bh ; bx - begin of FAT |
||
795 | shurf | 497 | |
1683 | art_zh | 498 | mov ax, word [BPB_BytsPerSec] |
499 | shr ax, 1 ; words per sector |
||
500 | mov cx, word [BPB_FATSz16] |
||
501 | mul cx |
||
502 | mov cx, ax ; cx - count of words in FAT |
||
503 | |||
504 | push es |
||
505 | push ds |
||
506 | pop es |
||
507 | mov ah, 0x87 |
||
508 | int 0x15 |
||
509 | pop es |
||
510 | test ah, ah |
||
511 | jnz sayerr_floppy |
||
512 | |||
513 | mov ax, cx |
||
514 | shl ax, 1 |
||
515 | and eax, 0ffffh ; ax - count of bytes in FAT |
||
516 | add dword [si+8*3+2], eax |
||
517 | |||
795 | shurf | 518 | ; reading RootDir |
519 | ; TODO: BPB_NumFATs |
||
1683 | art_zh | 520 | add bx, ax |
521 | add bx, 100h |
||
522 | and bx, 0ff00h ; bx - place in buffer to write RootDir |
||
523 | push bx |
||
795 | shurf | 524 | |
1683 | art_zh | 525 | mov bx, word [BPB_BytsPerSec] |
526 | shr bx, 5 ; divide bx by 32 |
||
527 | mov ax, word [BPB_RootEntCnt] |
||
528 | xor dx, dx |
||
529 | div bx |
||
530 | push ax ; ax - count of RootDir sectors |
||
795 | shurf | 531 | |
1683 | art_zh | 532 | mov ax, word [BPB_FATSz16] |
533 | xor cx, cx |
||
534 | mov cl, byte [BPB_NumFATs] |
||
535 | mul cx |
||
536 | add ax, word [BPB_RsvdSecCnt] ; ax - first sector of RootDir |
||
795 | shurf | 537 | |
1683 | art_zh | 538 | mov word [FirstDataSector], ax |
539 | pop bx |
||
540 | push bx |
||
541 | add word [FirstDataSector], bx ; Begin of data region of floppy |
||
542 | |||
795 | shurf | 543 | ; read RootDir |
1683 | art_zh | 544 | call conv_abs_to_THS |
545 | pop ax |
||
546 | pop bx ; place in buffer to write |
||
547 | push ax |
||
548 | call boot_read_floppy ; read RootDir into buffer |
||
795 | shurf | 549 | ; copy RootDir |
1683 | art_zh | 550 | mov byte [si+8*2+3], bh ; from buffer |
551 | pop ax ; ax = count of RootDir sectors |
||
552 | mov cx, word [BPB_BytsPerSec] |
||
553 | mul cx |
||
554 | shr ax, 1 |
||
555 | mov cx, ax ; count of words to copy |
||
556 | push es |
||
557 | push ds |
||
558 | pop es |
||
559 | mov ah, 0x87 |
||
560 | int 0x15 |
||
561 | pop es |
||
795 | shurf | 562 | |
1683 | art_zh | 563 | mov ax, cx |
564 | shl ax, 1 |
||
565 | and eax, 0ffffh ; ax - count of bytes in RootDir |
||
566 | add dword [si+8*3+2], eax ; add count of bytes copied |
||
795 | shurf | 567 | |
568 | ; Reading data clusters from floppy |
||
1683 | art_zh | 569 | mov byte [si+8*2+3], bh |
570 | push bx |
||
795 | shurf | 571 | |
1683 | art_zh | 572 | mov di, 2 ; First data cluster |
134 | diamond | 573 | .read_loop: |
1683 | art_zh | 574 | mov bx, di |
575 | shr bx, 1 ; bx+di = di*1.5 |
||
576 | jnc .even |
||
577 | test word [es:bx+di+0xB200], 0xFFF0 ; TODO: may not be 0xB200 !!! |
||
578 | jmp @f |
||
134 | diamond | 579 | .even: |
1683 | art_zh | 580 | test word [es:bx+di+0xB200], 0xFFF ; TODO: may not be 0xB200 !!! |
795 | shurf | 581 | |
134 | diamond | 582 | @@: |
1683 | art_zh | 583 | jz .skip |
795 | shurf | 584 | ; read cluster di |
585 | ;.read: |
||
1683 | art_zh | 586 | ;conv cluster di to abs. sector ax |
587 | ; ax = (N-2) * BPB_SecPerClus + FirstDataSector |
||
588 | mov ax, di |
||
589 | sub ax, 2 |
||
590 | xor bx, bx |
||
591 | mov bl, byte [BPB_SecPerClus] |
||
592 | mul bx |
||
593 | add ax, word [FirstDataSector] |
||
594 | call conv_abs_to_THS |
||
595 | pop bx |
||
596 | push bx |
||
597 | mov al, byte [BPB_SecPerClus] ; number of sectors in cluster |
||
598 | call boot_read_floppy |
||
599 | push es |
||
600 | push ds |
||
601 | pop es |
||
602 | pusha |
||
795 | shurf | 603 | ; |
1683 | art_zh | 604 | mov ax, word [BPB_BytsPerSec] |
605 | xor cx, cx |
||
606 | mov cl, byte [BPB_SecPerClus] |
||
607 | mul cx |
||
608 | shr ax, 1 ; ax = (BPB_BytsPerSec * BPB_SecPerClus)/2 |
||
609 | mov cx, ax ; number of words to copy (count words in cluster) |
||
795 | shurf | 610 | ; |
1683 | art_zh | 611 | mov ah, 0x87 |
612 | int 0x15 ; copy data |
||
613 | test ah, ah |
||
614 | popa |
||
615 | pop es |
||
616 | jnz sayerr_floppy |
||
795 | shurf | 617 | ; skip cluster di |
134 | diamond | 618 | .skip: |
1683 | art_zh | 619 | mov ax, word [BPB_BytsPerSec] |
620 | xor cx, cx |
||
621 | mov cl, byte [BPB_SecPerClus] |
||
622 | mul cx |
||
623 | and eax, 0ffffh ; ax - count of bytes in cluster |
||
624 | add dword [si+8*3+2], eax |
||
795 | shurf | 625 | |
1683 | art_zh | 626 | mov ax, word [end_of_FAT] ; max cluster number |
627 | pusha |
||
134 | diamond | 628 | ; draw percentage |
795 | shurf | 629 | ; total clusters: ax |
630 | ; read clusters: di |
||
1683 | art_zh | 631 | xchg ax, di |
632 | mov cx, 100 |
||
633 | mul cx |
||
634 | div di |
||
635 | aam |
||
636 | xchg al, ah |
||
637 | add ax, '00' |
||
134 | diamond | 638 | @@: |
1683 | art_zh | 639 | popa |
640 | inc di |
||
641 | cmp di, word [end_of_FAT] ; max number of cluster |
||
642 | jnz .read_loop |
||
643 | pop bx ; clear stack |
||
134 | diamond | 644 | |
709 | diamond | 645 | ok_sys_on_floppy: |
514 | diamond | 646 | no_sys_on_floppy: |
1683 | art_zh | 647 | xor ax, ax ; reset drive |
648 | xor dx, dx |
||
649 | int 0x13 |
||
650 | mov dx, 0x3f2 ; floppy motor off |
||
651 | mov al, 0 |
||
652 | out dx, al |
||
1952 | art_zh | 653 | --- |
654 | end if |
||
1 | ha | 655 | |
656 | |||
657 | ; SET GRAPHICS |
||
658 | |||
1683 | art_zh | 659 | xor ax, ax |
660 | mov es, ax |
||
164 | serge | 661 | |
1683 | art_zh | 662 | mov bx, [es:0x9008] ; vga & 320x200 |
663 | mov ax, 0x4f02 ; Vesa |
||
412 | serge | 664 | setgr: |
1683 | art_zh | 665 | int 0x10 |
666 | test ah, ah |
||
1703 | art_zh | 667 | jnz $ |
412 | serge | 668 | gmok2: |
1683 | art_zh | 669 | push ds |
670 | pop es><><<><<<><<<<><<<<<><<<<<<><<<<<<<><<<<<<<<><<<<<<<<<><<<<<<<<<<><<<<<<<<<<<><<<<<<<<<<<<><<<<<<<<<<<<<><<<<<<<<<<<<<<><<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<> |