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add info for pmboot.S

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yuchen
2015-03-14 00:17:50 +08:00
parent 7d29eb7cf0
commit dab71e324d
1 changed files with 3 additions and 3 deletions
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6
related_info/lab1/pmbootloader/pmboot.S
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@@ -16,9 +16,9 @@ start:
jmpl $0x0, $code
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:
GdtPtr: