Linux/boot/setup.S 迈不过友情╰ 2022-09-19 12:11 64阅读 0赞 Linux/boot/setup.S 1 ! 2 ! setup.S Copyright (C) 1991, 1992 Linus Torvalds 3 ! 4 ! setup.s is responsible for getting the system data from the BIOS, 5 ! and putting them into the appropriate places in system memory. 6 ! both setup.s and system has been loaded by the bootblock. 7 ! 8 ! This code asks the bios for memory/disk/other parameters, and 9 ! puts them in a "safe" place: 0x90000-0x901FF, ie where the 10 ! boot-block used to be. It is then up to the protected mode 11 ! system to read them from there before the area is overwritten 12 ! for buffer-blocks. 13 ! 14 ! Move PS/2 aux init code to psaux.c 15 ! (troyer@saifr00.cfsat.Honeywell.COM) 03Oct92 16 ! 17 ! some changes and additional features by Christoph Niemann, March 1993 18 ! (niemann@rubdv15.ETDV.Ruhr-Uni-Bochum.De) 19 ! 20 21 ! NOTE! These had better be the same as in bootsect.s! 22 \#include <linux/config.h> 23 \#include <linux/segment.h> 24 25 \#ifndef SVGA\_MODE 26 \#define SVGA\_MODE ASK\_VGA 27 \#endif 28 29 INITSEG = DEF\_INITSEG ! we move boot here - out of the way 30 SYSSEG = DEF\_SYSSEG ! system loaded at 0x10000 (65536). 31 SETUPSEG = DEF\_SETUPSEG ! this is the current segment 32 33 .globl begtext, begdata, begbss, endtext, enddata, endbss 34 .text 35 begtext: 36 .data 37 begdata: 38 .bss 39 begbss: 40 .text 41 42 entry start 43 start: 44 45 ! ok, the read went well so we get current cursor position and save it for 46 ! posterity. 47 48 mov ax,\#INITSEG ! this is done in bootsect already, but... 49 mov ds,ax 50 51 ! Get memory size (extended mem, kB) 52 53 mov ah,\#0x88 54 int 0x15 55 mov \[2\],ax 56 57 ! set the keyboard repeat rate to the max 58 59 mov ax,\#0x0305 60 xor bx,bx ! clear bx 61 int 0x16 62 63 ! check for EGA/VGA and some config parameters 64 65 mov ah,\#0x12 66 mov bl,\#0x10 67 int 0x10 68 mov \[8\],ax 69 mov \[10\],bx 70 mov \[12\],cx 71 mov ax,\#0x5019 72 cmp bl,\#0x10 73 je novga 74 mov ax,\#0x1a00 ! Added check for EGA/VGA discrimination 75 int 0x10 76 mov bx,ax 77 mov ax,\#0x5019 78 cmp bl,\#0x1a ! 1a means VGA, anything else EGA or lower 79 jne novga 80 call chsvga 81 novga: mov \[14\],ax 82 mov ah,\#0x03 ! read cursor pos 83 xor bh,bh ! clear bh 84 int 0x10 ! save it in known place, con\_init fetches 85 mov \[0\],dx ! it from 0x90000. 86 87 ! Get video-card data: 88 89 mov ah,\#0x0f 90 int 0x10 91 mov \[4\],bx ! bh = display page 92 mov \[6\],ax ! al = video mode, ah = window width 93 94 ! Get hd0 data 95 96 xor ax,ax ! clear ax 97 mov ds,ax 98 lds si,\[4\*0x41\] 99 mov ax,\#INITSEG 100 mov es,ax 101 mov di,\#0x0080 102 mov cx,\#0x10 103 cld 104 rep 105 movsb 106 107 ! Get hd1 data 108 109 xor ax,ax ! clear ax 110 mov ds,ax 111 lds si,\[4\*0x46\] 112 mov ax,\#INITSEG 113 mov es,ax 114 mov di,\#0x0090 115 mov cx,\#0x10 116 cld 117 rep 118 movsb 119 120 ! Check that there IS a hd1 :-) 121 122 mov ax,\#0x01500 123 mov dl,\#0x81 124 int 0x13 125 jc no\_disk1 126 cmp ah,\#3 127 je is\_disk1 128 no\_disk1: 129 mov ax,\#INITSEG 130 mov es,ax 131 mov di,\#0x0090 132 mov cx,\#0x10 133 xor ax,ax ! clear ax 134 cld 135 rep 136 stosb 137 is\_disk1: 138 139 ! check for PS/2 pointing device 140 141 mov ax,\#INITSEG 142 mov ds,ax 143 mov \[0x1ff\],\#0 ! default is no pointing device 144 int 0x11 ! int 0x11: equipment determination 145 test al,\#0x04 ! check if pointing device installed 146 jz no\_psmouse 147 mov \[0x1ff\],\#0xaa ! device present 148 no\_psmouse: 149 ! now we want to move to protected mode ... 150 151 cli ! no interrupts allowed ! 152 mov al,\#0x80 ! disable NMI for the bootup sequence 153 out \#0x70,al 154 155 ! first we move the system to its rightful place 156 157 mov ax,\#0x100 ! start of destination segment 158 mov bx,\#0x1000 ! start of source segment 159 cld ! 'direction'=0, movs moves forward 160 do\_move: 161 mov es,ax ! destination segment 162 add ax,\#0x100 163 cmp ax,\#0x9000 164 jz end\_move 165 mov ds,bx ! source segment 166 add bx,\#0x100 167 sub di,di 168 sub si,si 169 mov cx,\#0x800 170 rep 171 movsw 172 jmp do\_move 173 174 ! then we load the segment descriptors 175 176 end\_move: 177 mov ax,\#SETUPSEG ! right, forgot this at first. didn't work :-) 178 mov ds,ax 179 lidt idt\_48 ! load idt with 0,0 180 lgdt gdt\_48 ! load gdt with whatever appropriate 181 182 ! that was painless, now we enable A20 183 184 call empty\_8042 185 mov al,\#0xD1 ! command write 186 out \#0x64,al 187 call empty\_8042 188 mov al,\#0xDF ! A20 on 189 out \#0x60,al 190 call empty\_8042 191 192 ! make sure any possible coprocessor is properly reset.. 193 194 xor ax,ax 195 out \#0xf0,al 196 call delay 197 out \#0xf1,al 198 call delay 199 200 ! well, that went ok, I hope. Now we have to reprogram the interrupts :-( 201 ! we put them right after the intel-reserved hardware interrupts, at 202 ! int 0x20-0x2F. There they won't mess up anything. Sadly IBM really 203 ! messed this up with the original PC, and they haven't been able to 204 ! rectify it afterwards. Thus the bios puts interrupts at 0x08-0x0f, 205 ! which is used for the internal hardware interrupts as well. We just 206 ! have to reprogram the 8259's, and it isn't fun. 207 208 mov al,\#0x11 ! initialization sequence 209 out \#0x20,al ! send it to 8259A-1 210 call delay 211 out \#0xA0,al ! and to 8259A-2 212 call delay 213 mov al,\#0x20 ! start of hardware int's (0x20) 214 out \#0x21,al 215 call delay 216 mov al,\#0x28 ! start of hardware int's 2 (0x28) 217 out \#0xA1,al 218 call delay 219 mov al,\#0x04 ! 8259-1 is master 220 out \#0x21,al 221 call delay 222 mov al,\#0x02 ! 8259-2 is slave 223 out \#0xA1,al 224 call delay 225 mov al,\#0x01 ! 8086 mode for both 226 out \#0x21,al 227 call delay 228 out \#0xA1,al 229 call delay 230 mov al,\#0xFF ! mask off all interrupts for now 231 out \#0xA1,al 232 call delay 233 mov al,\#0xFB ! mask all irq's but irq2 which 234 out \#0x21,al ! is cascaded 235 236 ! well, that certainly wasn't fun :-(. Hopefully it works, and we don't 237 ! need no steenking BIOS anyway (except for the initial loading :-). 238 ! The BIOS-routine wants lots of unnecessary data, and it's less 239 ! "interesting" anyway. This is how REAL programmers do it. 240 ! 241 ! Well, now's the time to actually move into protected mode. To make 242 ! things as simple as possible, we do no register set-up or anything, 243 ! we let the gnu-compiled 32-bit programs do that. We just jump to 244 ! absolute address 0x00000, in 32-bit protected mode. 245 ! 246 ! Note that the short jump isn't strictly needed, althought there are 247 ! reasons why it might be a good idea. It won't hurt in any case. 248 ! 249 mov ax,\#0x0001 ! protected mode (PE) bit 250 lmsw ax ! This is it! 251 jmp flush\_instr 252 flush\_instr: 253 jmpi 0x1000,KERNEL\_CS ! jmp offset 1000 of segment 0x10 (cs) 254 255 ! This routine checks that the keyboard command queue is empty 256 ! (after emptying the output buffers) 257 ! 258 ! No timeout is used - if this hangs there is something wrong with 259 ! the machine, and we probably couldn't proceed anyway. 260 empty\_8042: 261 call delay 262 in al,\#0x64 ! 8042 status port 263 test al,\#1 ! output buffer? 264 jz no\_output 265 call delay 266 in al,\#0x60 ! read it 267 jmp empty\_8042 268 no\_output: 269 test al,\#2 ! is input buffer full? 270 jnz empty\_8042 ! yes - loop 271 ret 272 ! 273 ! Read a key and return the (US-)ascii code in al, scan code in ah 274 ! 275 getkey: 276 xor ah,ah 277 int 0x16 278 ret 279 280 ! 281 ! Read a key with a timeout of 30 seconds. The cmos clock is used to get 282 ! the time. 283 ! 284 getkt: 285 call gettime 286 add al,\#30 ! wait 30 seconds 287 cmp al,\#60 288 jl lminute 289 sub al,\#60 290 lminute: 291 mov cl,al 292 again: mov ah,\#0x01 293 int 0x16 294 jnz getkey ! key pressed, so get it 295 call gettime 296 cmp al,cl 297 jne again 298 mov al,\#0x20 ! timeout, return default char \`space' 299 ret 300 301 ! 302 ! Flush the keyboard buffer 303 ! 304 flush: mov ah,\#0x01 305 int 0x16 306 jz empty 307 xor ah,ah 308 int 0x16 309 jmp flush 310 empty: ret 311 312 ! 313 ! Read the cmos clock. Return the seconds in al 314 ! 315 gettime: 316 push cx 317 mov ah,\#0x02 318 int 0x1a 319 mov al,dh ! dh contains the seconds 320 and al,\#0x0f 321 mov ah,dh 322 mov cl,\#0x04 323 shr ah,cl 324 aad 325 pop cx 326 ret 327 328 ! 329 ! Delay is needed after doing i/o 330 ! 331 delay: 332 .word 0x00eb ! jmp $+2 333 ret 334 335 ! Routine trying to recognize type of SVGA-board present (if any) 336 ! and if it recognize one gives the choices of resolution it offers. 337 ! If one is found the resolution chosen is given by al,ah (rows,cols). 338 339 chsvga: cld 340 push ds 341 push cs 342 mov ax,\[0x01fa\] 343 pop ds 344 mov modesave,ax 345 mov ax,\#0xc000 346 mov es,ax 347 mov ax,modesave 348 cmp ax,\#NORMAL\_VGA 349 je defvga 350 cmp ax,\#EXTENDED\_VGA 351 je vga50 352 cmp ax,\#ASK\_VGA 353 jne svga 354 lea si,msg1 355 call prtstr 356 call flush 357 nokey: call getkt 358 cmp al,\#0x0d ! enter ? 359 je svga ! yes - svga selection 360 cmp al,\#0x20 ! space ? 361 je defvga ! no - repeat 362 call beep 363 jmp nokey 364 defvga: mov ax,\#0x5019 365 pop ds 366 ret 367 /\* extended vga mode: 80x50 \*/ 368 vga50: 369 mov ax,\#0x1112 370 xor bl,bl 371 int 0x10 ! use 8x8 font set (50 lines on VGA) 372 mov ax,\#0x1200 373 mov bl,\#0x20 374 int 0x10 ! use alternate print screen 375 mov ax,\#0x1201 376 mov bl,\#0x34 377 int 0x10 ! turn off cursor emulation 378 mov ah,\#0x01 379 mov cx,\#0x0607 380 int 0x10 ! turn on cursor (scan lines 6 to 7) 381 pop ds 382 mov ax,\#0x5032 ! return 80x50 383 ret 384 /\* extended vga mode: 80x28 \*/ 385 vga28: 386 pop ax ! clean the stack 387 mov ax,\#0x1111 388 xor bl,bl 389 int 0x10 ! use 9x14 fontset (28 lines on VGA) 390 mov ah, \#0x01 391 mov cx,\#0x0b0c 392 int 0x10 ! turn on cursor (scan lines 11 to 12) 393 pop ds 394 mov ax,\#0x501c ! return 80x28 395 ret 396 /\* svga modes \*/ 397 svga: cld 398 lea si,id9GXE ! Check for the \#9GXE (jyanowit@orixa.mtholyoke.edu,thanks dlm40629@uxa.cso.uiuc.edu) 399 mov di,\#0x49 ! id string is at c000:049 400 mov cx,\#0x11 ! length of "Graphics Power By" 401 repe 402 cmpsb 403 jne of1280 404 is9GXE: lea si,dsc9GXE ! table of descriptions of video modes for BIOS 405 lea di,mo9GXE ! table of sizes of video modes for my BIOS 406 br selmod ! go ask for video mode 407 of1280: cld 408 lea si,idf1280 ! Check for Orchid F1280 (dingbat@diku.dk) 409 mov di,\#0x10a ! id string is at c000:010a 410 mov cx,\#0x21 ! length 411 repe 412 cmpsb 413 jne nf1280 414 isVRAM: lea si,dscf1280 415 lea di,mof1280 416 br selmod 417 nf1280: lea si,idVRAM 418 mov di,\#0x10a 419 mov cx,\#0x0c 420 repe 421 cmpsb 422 je isVRAM 423 cld 424 lea si,idati ! Check ATI 'clues' 425 mov di,\#0x31 426 mov cx,\#0x09 427 repe 428 cmpsb 429 jne noati 430 lea si,dscati 431 lea di,moati 432 br selmod 433 noati: mov ax,\#0x200f ! Check Ahead 'clues' 434 mov dx,\#0x3ce 435 out dx,ax 436 inc dx 437 in al,dx 438 cmp al,\#0x20 439 je isahed 440 cmp al,\#0x21 441 jne noahed 442 isahed: lea si,dscahead 443 lea di,moahead 444 br selmod 445 noahed: mov dx,\#0x3c3 ! Check Chips & Tech. 'clues' 446 in al,dx 447 or al,\#0x10 448 out dx,al 449 mov dx,\#0x104 450 in al,dx 451 mov bl,al 452 mov dx,\#0x3c3 453 in al,dx 454 and al,\#0xef 455 out dx,al 456 cmp bl,\[idcandt\] 457 jne nocant 458 lea si,dsccandt 459 lea di,mocandt 460 br selmod 461 nocant: mov dx,\#0x3d4 ! Check Cirrus 'clues' 462 mov al,\#0x0c 463 out dx,al 464 inc dx 465 in al,dx 466 mov bl,al 467 xor al,al 468 out dx,al 469 dec dx 470 mov al,\#0x1f 471 out dx,al 472 inc dx 473 in al,dx 474 mov bh,al 475 xor ah,ah 476 shl al,\#4 477 mov cx,ax 478 mov al,bh 479 shr al,\#4 480 add cx,ax 481 shl cx,\#8 482 add cx,\#6 483 mov ax,cx 484 mov dx,\#0x3c4 485 out dx,ax 486 inc dx 487 in al,dx 488 and al,al 489 jnz nocirr 490 mov al,bh 491 out dx,al 492 in al,dx 493 cmp al,\#0x01 494 jne nocirr 495 call rst3d4 496 lea si,dsccirrus 497 lea di,mocirrus 498 br selmod 499 rst3d4: mov dx,\#0x3d4 500 mov al,bl 501 xor ah,ah 502 shl ax,\#8 503 add ax,\#0x0c 504 out dx,ax 505 ret 506 nocirr: call rst3d4 ! Check Everex 'clues' 507 mov ax,\#0x7000 508 xor bx,bx 509 int 0x10 510 cmp al,\#0x70 511 jne noevrx 512 shr dx,\#4 513 cmp dx,\#0x678 514 je istrid 515 cmp dx,\#0x236 516 je istrid 517 lea si,dsceverex 518 lea di,moeverex 519 br selmod 520 istrid: lea cx,ev2tri 521 jmp cx 522 noevrx: lea si,idgenoa ! Check Genoa 'clues' 523 xor ax,ax 524 seg es 525 mov al,\[0x37\] 526 mov di,ax 527 mov cx,\#0x04 528 dec si 529 dec di 530 l1: inc si 531 inc di 532 mov al,(si) 533 test al,al 534 jz l2 535 seg es 536 cmp al,(di) 537 l2: loope l1 538 cmp cx,\#0x00 539 jne nogen 540 lea si,dscgenoa 541 lea di,mogenoa 542 br selmod 543 nogen: cld 544 lea si,idoakvga 545 mov di,\#0x08 546 mov cx,\#0x08 547 repe 548 cmpsb 549 jne nooak 550 lea si,dscoakvga 551 lea di,mooakvga 552 br selmod 553 nooak: cld 554 lea si,idparadise ! Check Paradise 'clues' 555 mov di,\#0x7d 556 mov cx,\#0x04 557 repe 558 cmpsb 559 jne nopara 560 lea si,dscparadise 561 lea di,moparadise 562 br selmod 563 nopara: mov dx,\#0x3c4 ! Check Trident 'clues' 564 mov al,\#0x0e 565 out dx,al 566 inc dx 567 in al,dx 568 xchg ah,al 569 xor al,al 570 out dx,al 571 in al,dx 572 xchg al,ah 573 mov bl,al ! Strange thing ... in the book this wasn't 574 and bl,\#0x02 ! necessary but it worked on my card which 575 jz setb2 ! is a trident. Without it the screen goes 576 and al,\#0xfd ! blurred ... 577 jmp clrb2 ! 578 setb2: or al,\#0x02 ! 579 clrb2: out dx,al 580 and ah,\#0x0f 581 cmp ah,\#0x02 582 jne notrid 583 ev2tri: lea si,dsctrident 584 lea di,motrident 585 jmp selmod 586 notrid: mov dx,\#0x3cd ! Check Tseng 'clues' 587 in al,dx ! Could things be this simple ! :-) 588 mov bl,al 589 mov al,\#0x55 590 out dx,al 591 in al,dx 592 mov ah,al 593 mov al,bl 594 out dx,al 595 cmp ah,\#0x55 596 jne notsen 597 lea si,dsctseng 598 lea di,motseng 599 jmp selmod 600 notsen: mov dx,\#0x3cc ! Check Video7 'clues' 601 in al,dx 602 mov dx,\#0x3b4 603 and al,\#0x01 604 jz even7 605 mov dx,\#0x3d4 606 even7: mov al,\#0x0c 607 out dx,al 608 inc dx 609 in al,dx 610 mov bl,al 611 mov al,\#0x55 612 out dx,al 613 in al,dx 614 dec dx 615 mov al,\#0x1f 616 out dx,al 617 inc dx 618 in al,dx 619 mov bh,al 620 dec dx 621 mov al,\#0x0c 622 out dx,al 623 inc dx 624 mov al,bl 625 out dx,al 626 mov al,\#0x55 627 xor al,\#0xea 628 cmp al,bh 629 jne novid7 630 lea si,dscvideo7 631 lea di,movideo7 632 jmp selmod 633 novid7: lea si,dsunknown 634 lea di,mounknown 635 selmod: xor cx,cx 636 mov cl,(di) 637 mov ax,modesave 638 cmp ax,\#ASK\_VGA 639 je askmod 640 cmp ax,\#NORMAL\_VGA 641 je askmod 642 cmp al,cl 643 jl gotmode 644 push si 645 lea si,msg4 646 call prtstr 647 pop si 648 askmod: push si 649 lea si,msg2 650 call prtstr 651 pop si 652 push si 653 push cx 654 tbl: pop bx 655 push bx 656 mov al,bl 657 sub al,cl 658 call modepr 659 lodsw 660 xchg al,ah 661 call dprnt 662 xchg ah,al 663 push ax 664 mov al,\#0x78 665 call prnt1 666 pop ax 667 call dprnt 668 push si 669 lea si,crlf ! print CR+LF 670 call prtstr 671 pop si 672 loop tbl 673 pop cx 674 lea si,msg3 675 call prtstr 676 pop si 677 add cl,\#0x30 678 jmp nonum 679 nonumb: call beep 680 nonum: call getkey 681 cmp al,\#0x30 ! ascii \`0' 682 jb nonumb 683 cmp al,\#0x3a ! ascii \`9' 684 jbe number 685 cmp al,\#0x61 ! ascii \`a' 686 jb nonumb 687 cmp al,\#0x7a ! ascii \`z' 688 ja nonumb 689 sub al,\#0x27 690 cmp al,cl 691 jae nonumb 692 sub al,\#0x30 693 jmp gotmode 694 number: cmp al,cl 695 jae nonumb 696 sub al,\#0x30 697 gotmode: xor ah,ah 698 or al,al 699 beq vga50 700 push ax 701 dec ax 702 beq vga28 703 add di,ax 704 mov al,(di) 705 int 0x10 706 pop ax 707 shl ax,\#1 708 add si,ax 709 lodsw 710 pop ds 711 ret 712 713 ! Routine to print asciiz-string at DS:SI 714 715 prtstr: lodsb 716 and al,al 717 jz fin 718 call prnt1 719 jmp prtstr 720 fin: ret 721 722 ! Routine to print a decimal value on screen, the value to be 723 ! printed is put in al (i.e 0-255). 724 725 dprnt: push ax 726 push cx 727 xor ah,ah ! Clear ah 728 mov cl,\#0x0a 729 idiv cl 730 cmp al,\#0x09 731 jbe lt100 732 call dprnt 733 jmp skip10 734 lt100: add al,\#0x30 735 call prnt1 736 skip10: mov al,ah 737 add al,\#0x30 738 call prnt1 739 pop cx 740 pop ax 741 ret 742 743 ! 744 ! Routine to print the mode number key on screen. Mode numbers 745 ! 0-9 print the ascii values \`0' to '9', 10-35 are represented by 746 ! the letters \`a' to \`z'. This routine prints some spaces around the 747 ! mode no. 748 ! 749 750 modepr: push ax 751 cmp al,\#0x0a 752 jb digit ! Here is no check for number > 35 753 add al,\#0x27 754 digit: add al,\#0x30 755 mov modenr, al 756 push si 757 lea si, modestring 758 call prtstr 759 pop si 760 pop ax 761 ret 762 763 ! Part of above routine, this one just prints ascii al 764 765 prnt1: push ax 766 push cx 767 xor bh,bh 768 mov cx,\#0x01 769 mov ah,\#0x0e 770 int 0x10 771 pop cx 772 pop ax 773 ret 774 775 beep: mov al,\#0x07 776 jmp prnt1 777 778 gdt: 779 .word 0,0,0,0 ! dummy 780 781 .word 0,0,0,0 ! unused 782 783 .word 0x07FF ! 8Mb - limit=2047 (2048\*4096=8Mb) 784 .word 0x0000 ! base address=0 785 .word 0x9A00 ! code read/exec 786 .word 0x00C0 ! granularity=4096, 386 787 788 .word 0x07FF ! 8Mb - limit=2047 (2048\*4096=8Mb) 789 .word 0x0000 ! base address=0 790 .word 0x9200 ! data read/write 791 .word 0x00C0 ! granularity=4096, 386 792 793 idt\_48: 794 .word 0 ! idt limit=0 795 .word 0,0 ! idt base=0L 796 797 gdt\_48: 798 .word 0x800 ! gdt limit=2048, 256 GDT entries 799 .word 512+gdt,0x9 ! gdt base = 0X9xxxx 800 801 msg1: .ascii "Press <RETURN> to see SVGA-modes available, <SPACE> to continue or wait 30 secs." 802 db 0x0d, 0x0a, 0x0a, 0x00 803 msg2: .ascii "Mode: COLSxROWS:" 804 db 0x0d, 0x0a, 0x0a, 0x00 805 msg3: db 0x0d, 0x0a 806 .ascii "Choose mode by pressing the corresponding number or letter." 807 crlf: db 0x0d, 0x0a, 0x00 808 msg4: .ascii "You passed an undefined mode number to setup. Please choose a new mode." 809 db 0x0d, 0x0a, 0x0a, 0x07, 0x00 810 modestring: .ascii " " 811 modenr: db 0x00 ! mode number 812 .ascii ": " 813 db 0x00 814 815 idati: .ascii "761295520" 816 idcandt: .byte 0xa5 817 idgenoa: .byte 0x77, 0x00, 0x99, 0x66 818 idparadise: .ascii "VGA=" 819 idoakvga: .ascii "OAK VGA " 820 idf1280: .ascii "Orchid Technology Fahrenheit 1280" 821 id9GXE: .ascii "Graphics Power By" 822 idVRAM: .ascii "Stealth VRAM" 823 824 ! Manufacturer: Numofmodes+2: Mode: 825 ! Number of modes is the number of chip-specific svga modes plus the extended 826 ! modes available on any vga (currently 2) 827 828 moati: .byte 0x04, 0x23, 0x33 829 moahead: .byte 0x07, 0x22, 0x23, 0x24, 0x2f, 0x34 830 mocandt: .byte 0x04, 0x60, 0x61 831 mocirrus: .byte 0x06, 0x1f, 0x20, 0x22, 0x31 832 moeverex: .byte 0x0c, 0x03, 0x04, 0x07, 0x08, 0x0a, 0x0b, 0x16, 0x18, 0x21, 0x40 833 mogenoa: .byte 0x0c, 0x58, 0x5a, 0x60, 0x61, 0x62, 0x63, 0x64, 0x72, 0x74, 0x78 834 moparadise: .byte 0x04, 0x55, 0x54 835 motrident: .byte 0x09, 0x50, 0x51, 0x52, 0x57, 0x58, 0x59, 0x5a 836 motseng: .byte 0x07, 0x26, 0x2a, 0x23, 0x24, 0x22 837 movideo7: .byte 0x08, 0x40, 0x43, 0x44, 0x41, 0x42, 0x45 838 mooakvga: .byte 0x08, 0x00, 0x07, 0x4e, 0x4f, 0x50, 0x51 839 mo9GXE: .byte 0x04, 0x54, 0x55 840 mof1280: .byte 0x04, 0x54, 0x55 841 mounknown: .byte 0x02 842 843 ! msb = Cols lsb = Rows: 844 ! The first two modes are standard vga modes available on any vga. 845 ! mode 0 is 80x50 and mode 1 is 80x28 846 847 dscati: .word 0x5032, 0x501c, 0x8419, 0x842c 848 dscahead: .word 0x5032, 0x501c, 0x842c, 0x8419, 0x841c, 0xa032, 0x5042 849 dsccandt: .word 0x5032, 0x501c, 0x8419, 0x8432 850 dsccirrus: .word 0x5032, 0x501c, 0x8419, 0x842c, 0x841e, 0x6425 851 dsceverex: .word 0x5032, 0x501c, 0x5022, 0x503c, 0x642b, 0x644b, 0x8419, 0x842c, 0x501e, 0x641b, 0xa040, 0x841e 852 dscgenoa: .word 0x5032, 0x501c, 0x5020, 0x642a, 0x8419, 0x841d, 0x8420, 0x842c, 0x843c, 0x503c, 0x5042, 0x644b 853 dscparadise: .word 0x5032, 0x501c, 0x8419, 0x842b 854 dsctrident: .word 0x5032, 0x501c, 0x501e, 0x502b, 0x503c, 0x8419, 0x841e, 0x842b, 0x843c 855 dsctseng: .word 0x5032, 0x501c, 0x503c, 0x6428, 0x8419, 0x841c, 0x842c 856 dscvideo7: .word 0x5032, 0x501c, 0x502b, 0x503c, 0x643c, 0x8419, 0x842c, 0x841c 857 dscoakvga: .word 0x5032, 0x501c, 0x2819, 0x5019, 0x503c, 0x843c, 0x8419, 0x842b 858 dscf1280: .word 0x5032, 0x501c, 0x842b, 0x8419 859 dsc9GXE: .word 0x5032, 0x501c, 0x842b, 0x8419 860 dsunknown: .word 0x5032, 0x501c 861 modesave: .word SVGA\_MODE 862 863 864 .text 865 endtext: 866 .data 867 enddata: 868 .bss 869 endbss:
还没有评论，来说两句吧...