如何在装配中使用28位PIO正确读取磁盘中的多个扇区?
这是我的加载扇区子程序:
load32:
jmp load32_skipvars:
load32_source dd 0
load32_return dd 0
load32_skipvars:
mov dword [load32_source], esi
mov dword [load32_return], ebx
mov ebx, ecx
mov al, byte [load32_source + 3]
or al, 0xe0
mov dx, 0x1f6
out dx, al
mov dx, 0x1f1
mov al, 0x00
out dx, al
mov dx, 0x1f2
mov al, cl
out dx, al
mov al, byte [load32_source]
mov dx, 0x1f3
out dx, al
mov al, byte [load32_source + 1]
mov dx, 0x1f4
out dx, al
mov al, byte [load32_source + 2]
mov dx, 0x1f5
out dx, al
mov dx, 0x1f7
mov al, 0x20
out dx, al
waitforit:
in al, dx
test al, 0x08
jz waitforit
mov ecx, 0x00000100
mov edx, 0x000001f0
rep insw
dec ebx
cmp ebx, 0
jg waitforit
jmp [load32_return]
可以这样称呼:
mov esi, dword [kernel_cluster_loc]
mov edi, dword [kernel_put]
xor ecx, ecx
mov cl, [bpb_sectors_per_cluster]
mov ebx, morekernel
jmp load32
morekernel:
这会加载多个扇区,但是,它们之间有多个“FFFFFFFF”扇区,将它分成几块,因此它不是连续的。
这是加载后内存的样子:
Offset(h) 00 04 08 0C
00100000 BDFFFFEF 00BCFFFF EF00E852 010000EB ½ÿÿï.¼ÿÿï.èR...ë
00100010 FE5589E5 905DC355 89E583EC 088B5508 þU‰å.]ÃU‰åƒì.‹U.
00100020 8B450C66 8955FC88 45F80FB7 55FC0FB6 ‹E.f‰UüˆEø.·Uü.¶
00100030 45F8EE90 C9C35589 E583EC10 C745F800 Eøî.ÉÃU‰åƒì.ÇEø.
00100040 000000C7 45FC0000 0000EB08 8345F801 ...ÇEü....ë.ƒEø.
00100050 8345FC01 8B55088B 45FC01D0 0FB60084 ƒEü.‹U.‹Eü.Ð.¶.„
00100060 C075E98B 45F8C9C3 5589E56A 0F68D403 Àué‹EøÉÃU‰åj.hÔ.
00100070 0000E8A0 FFFFFF83 C4088B45 080FB6C0 ..è ÿÿÿƒÄ.‹E..¶À
00100080 5068D503 0000E88C FFFFFF83 C4086A0E PhÕ...èŒÿÿÿƒÄ.j.
00100090 68D40300 00E87DFF FFFF83C4 088B4508 hÔ...è}ÿÿÿƒÄ.‹E.
001000A0 C1E8080F B6C05068 D5030000 E866FFFF Áè..¶ÀPhÕ...èfÿÿ
001000B0 FF83C408 90C9C355 89E583EC 10C745FC ÿƒÄ..ÉÃU‰åƒì.ÇEü
001000C0 00800B00 C745F800 000000EB 1D8B55F8 .€..ÇEø....ë.‹Uø
001000D0 8B45FC01 D0C60020 8B45F88D 50018B45 ‹Eü.ÐÆ. ‹Eø.P.‹E
001000E0 FC01D0C6 00078345 F802817D F89F0F00 ü.ÐÆ..ƒEø..}øŸ..
001000F0 007EDA90 C9C35589 E583EC10 C745FC00 .~Ú.ÉÃU‰åƒì.ÇEü.
00100100 800B00FF 7508E82B FFFFFF83 C404C1E0 €..ÿu.è+ÿÿÿƒÄ.Áà
00100110 0201450C C745F400 000000C7 45F80000 ..E.ÇEô....ÇEø..
00100120 0000EB2B 8B55F48B 45FC01C2 8B4DF88B ..ë+‹Uô‹Eü.‹Mø‹
00100130 450801C8 0FB60088 028B45F4 8D50018B E..È.¶.ˆ.‹Eô.P.‹
00100140 45FC01D0 C6000783 45F80183 45F4028B Eü.ÐÆ..ƒEø.ƒEô.‹
00100150 55F88B45 0801D00F B60084C0 75C690C9 Uø‹E..Ð.¶.„ÀuÆ.É
00100160 C35589E5 83EC1865 A1140000 008945F4 ÃU‰åƒì.e¡....‰Eô
00100170 31C0C745 EC000000 00C745F0 C0011000 1ÀÇEì....ÇEðÀ...
00100180 E832FFFF FF8B45EC 50E8DAFE FFFF83C4 è2ÿÿÿ‹EìPèÚþÿÿƒÄ
00100190 048D45EC 50FF75F0 E859FFFF FF83C408 ..EìPÿuðèYÿÿÿƒÄ.
001001A0 8B45EC50 E8BFFEFF FF83C404 908B45F4 ‹EìPè¿þÿÿƒÄ..‹Eô
001001B0 65330514 00000074 05E853FE FFFFC9C3 e3.....t.èSþÿÿÉÃ
001001C0 54686973 20697320 796F206B 65726E65 This is yo kerne
001001D0 6C206D65 6E672100 14000000 00000000 l meng!.........
001001E0 017A5200 017C0801 1B0C0404 88010000 .zR..|......ˆ...
001001F0 1C000000 1C000000 19FEFFFF 06000000 .........þÿÿ....
00100200 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100210 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100220 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100230 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100240 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100250 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100260 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100270 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100280 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100290 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001002A0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001002B0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001002C0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001002D0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001002E0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001002F0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100300 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100310 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100320 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100330 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100340 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100350 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100360 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100370 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100380 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100390 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001003A0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001003B0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001003C0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001003D0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001003E0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001003F0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100400 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100410 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100420 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100430 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100440 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100450 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100460 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100470 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100480 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100490 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001004A0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001004B0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001004C0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001004D0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001004E0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001004F0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100500 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100510 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100520 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100530 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100540 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100550 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100560 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100570 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100580 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100590 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001005A0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001005B0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001005C0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001005D0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001005E0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001005F0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100600 00410E08 8502420D 0542C50C 04040000 .A..….B..BÅ.....
00100610 1C000000 3C000000 FFFDFFFF 1F000000 ....<...ÿýÿÿ....
00100620 00410E08 8502420D 055BC50C 04040000 .A..….B..[Å.....
00100630 1C000000 5C000000 FEFDFFFF 32000000 ....\...þýÿÿ2...
00100640 00410E08 8502420D 056EC50C 04040000 .A..….B..nÅ.....
00100650 1C000000 7C000000 10FEFFFF 4F000000 ....|....þÿÿO...
00100660 00410E08 8502420D 05024BC5 0C040400 .A..….B...KÅ....
00100670 1C000000 9C000000 3FFEFFFF 3F000000 ....œ...?þÿÿ?...
00100680 00410E08 8502420D 057BC50C 04040000 .A..….B..{Å.....
00100690 1C000000 BC000000 5EFEFFFF 6B000000 ....¼...^þÿÿk...
001006A0 00410E08 8502420D 050267C5 0C040400 .A..….B...gÅ....
001006B0 1C000000 DC000000 A9FEFFFF 5F000000 ....Ü...©þÿÿ_...
001006C0 00410E08 8502420D 05025BC5 0C040400 .A..….B...[Å....
001006D0 00000000 00000000 00000000 00000000 ................
001006E0 00000000 00000000 00000000 00000000 ................
001006F0 00000000 00000000 00000000 00000000 ................
00100700 00000000 00000000 00000000 00000000 ................
00100710 00000000 00000000 00000000 00000000 ................
00100720 00000000 00000000 00000000 00000000 ................
00100730 00000000 00000000 00000000 00000000 ................
00100740 00000000 00000000 00000000 00000000 ................
00100750 00000000 00000000 00000000 00000000 ................
00100760 00000000 00000000 00000000 00000000 ................
00100770 00000000 00000000 00000000 00000000 ................
00100780 00000000 00000000 00000000 00000000 ................
00100790 00000000 00000000 00000000 00000000 ................
001007A0 00000000 00000000 00000000 00000000 ................
001007B0 00000000 00000000 00000000 00000000 ................
001007C0 00000000 00000000 00000000 00000000 ................
001007D0 00000000 00000000 00000000 00000000 ................
001007E0 00000000 00000000 00000000 00000000 ................
001007F0 00000000 00000000 00000000 00000000 ................
00100800 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100810 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100820 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100830 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100840 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100850 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100860 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100870 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100880 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100890 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001008A0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001008B0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001008C0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001008D0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001008E0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001008F0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100900 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100910 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100920 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100930 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100940 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100950 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100960 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100970 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100980 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100990 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001009A0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001009B0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001009C0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001009D0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001009E0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
001009F0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100A00 10000600 0000FC01 10000A00 00005400 ......ü.......T.
00100A10 00000B00 00001000 00001100 0000C003 ..............À.
00100A20 10001200 00003000 00001300 00000800 ......0.........
00100A30 00001600 00000000 0000FAFF FF6F0100 ..........úÿÿo..
00100A40 00000000 00000000 00000000 00000000 ................
00100A50 00000000 00000000 00000000 00000000 ................
00100A60 00000000 00000000 00000000 00000000 ................
00100A70 00000000 00000000 00000000 00000000 ................
00100A80 00000000 00000000 00000000 00000000 ................
00100A90 00000000 00000000 00000000 00000000 ................
00100AA0 00000000 00000000 00000000 00000000 ................
00100AB0 00000000 00000000 00000000 00000000 ................
00100AC0 00000000 00000000 00000000 00000000 ................
00100AD0 00000000 00000000 00000000 00000000 ................
00100AE0 00000000 00000000 00000000 00000000 ................
00100AF0 00000000 00000000 00000000 00000000 ................
00100B00 00000000 00000000 00000000 00000000 ................
00100B10 00000000 00000000 00000000 00000000 ................
00100B20 00000000 00000000 00000000 00000000 ................
00100B30 00000000 00000000 00000000 00000000 ................
00100B40 00000000 00000000 00000000 00000000 ................
00100B50 00000000 00000000 00000000 00000000 ................
00100B60 00000000 00000000 00000000 00000000 ................
00100B70 00000000 00000000 00000000 00000000 ................
00100B80 00000000 00000000 00000000 00000000 ................
00100B90 00000000 00000000 00000000 00000000 ................
00100BA0 00000000 00000000 00000000 00000000 ................
00100BB0 00000000 00000000 00000000 00000000 ................
00100BC0 00000000 00000000 00000000 00000000 ................
00100BD0 00000000 00000000 00000000 00000000 ................
00100BE0 00000000 00000000 00000000 00000000 ................
00100BF0 00000000 00000000 0000FFFF FFFFFFFF ..........ÿÿÿÿÿÿ
00100C00 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100C10 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100C20 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100C30 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100C40 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100C50 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100C60 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100C70 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100C80 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100C90 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100CA0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100CB0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100CC0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100CD0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100CE0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100CF0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100D00 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100D10 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100D20 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100D30 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100D40 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100D50 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100D60 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100D70 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100D80 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100D90 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100DA0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100DB0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100DC0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100DD0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100DE0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100DF0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100E00 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100E10 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100E20 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100E30 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100E40 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100E50 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100E60 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100E70 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100E80 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100E90 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100EA0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100EB0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100EC0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100ED0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100EE0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100EF0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100F00 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100F10 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100F20 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100F30 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100F40 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100F50 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100F60 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100F70 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100F80 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100F90 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100FA0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100FB0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100FC0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100FD0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100FE0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
00100FF0 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
不是“FF”的三个部分是整个文件,我只是想弄清楚如何正确加载它。我认为这与扇区之间所需的等待有关,但我会在每个扇区之后回到waitforit
我做错了什么?
答案 0 :(得分:3)
您忘记在循环结束时将dx
恢复为1f7h
(ATA控制器状态寄存器)。
无法恢复dx
将使第3位( DRQ )的测试在数据寄存器上进行。
由于电子遗留问题,因此未经过服务的IO读取会返回一个设置了所有位的数据,测试始终会将您引导至违规读取。
有点好奇的是,只有在读取了整数扇区(512字节)后,控制器才会返回正确的数据 - 可能是由于某些内部计数器/锁存逻辑。
这有点偏离主题,但如果可以的话,让我再给你一个建议。
<强>鲁棒性强>
<强>可读性强>
&#34;编程参考&#34;对于旧的AT控制器或PCI连接的ATA控制器是ATA/ATAPI 6 specification,它基本上是SATA推出之前的最新产品之一。
它还描述了ATAPI(例如高级磁盘管理,CD-ROM读取器)接口和所有可能定义的命令
阅读起来非常舒服,只是被警告说你不会找到IO端口地址而是偏移(编码为断言/非断言引脚,但这只是端口地址低位的二进制模式)。 / p>