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add info for pmboot.S

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yuchen 9 years ago
parent
7d29eb7cf0
commit
dab71e324d
1 changed files with 3 additions and 3 deletions
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  1. +3
    -3
      related_info/lab1/pmbootloader/pmboot.S

+ 3
- 3
related_info/lab1/pmbootloader/pmboot.S View File

@ -16,9 +16,9 @@ start:
jmpl $0x0, $code jmpl $0x0, $code
GDT_START: GDT_START:
Descriptor_DUMMY:Descriptor(0x0,0x0,0x0)
Descript_CODE32 :Descriptor(0x0,0xffffffff,DA_C+DA_32)
Descriptor_VIDEO:Descriptor(0xb8000,0x0ffff,DA_DRW)
Descriptor_DUMMY:Descriptor(0x0,0x0,0x0) /* 第0项里面全是0，不会用到 */
Descript_CODE32 :Descriptor(0x0,0xffffffff,DA_C+DA_32) /* 32位代码段的段基址，段界限，访问类型 */
Descriptor_VIDEO:Descriptor(0xb8000,0x0ffff,DA_DRW) /* 显存的段基址，段界限，访问类型 */
GDT_END: GDT_END:
GdtPtr: GdtPtr:

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