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提交 90a81b32 创建 作者: Robert Morris's avatar Robert Morris
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comment nits

上级 9b59dc44
隐藏空白字符变更
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正在显示 包含 3 行增加 和 3 行删除
bootasm.S
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...@@ -12,8 +12,8 @@ ...@@ -12,8 +12,8 @@
start: start:
cli # BIOS enabled interrupts; disable cli # BIOS enabled interrupts; disable
# Set up the important data segment registers (DS, ES, SS). # Zero data segment registers DS, ES, and SS.
xorw %ax,%ax # Segment number zero xorw %ax,%ax # Set %ax to zero
movw %ax,%ds # -> Data Segment movw %ax,%ds # -> Data Segment
movw %ax,%es # -> Extra Segment movw %ax,%es # -> Extra Segment
movw %ax,%ss # -> Stack Segment movw %ax,%ss # -> Stack Segment
...@@ -37,7 +37,7 @@ seta20.2: ...@@ -37,7 +37,7 @@ seta20.2:
outb %al,$0x60 outb %al,$0x60
# Switch from real to protected mode. Use a bootstrap GDT that makes # Switch from real to protected mode. Use a bootstrap GDT that makes
# virtual addresses map dierctly to physical addresses so that the # virtual addresses map directly to physical addresses so that the
# effective memory map doesn't change during the transition. # effective memory map doesn't change during the transition.
lgdt gdtdesc lgdt gdtdesc
movl %cr0, %eax movl %cr0, %eax
......
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