【一个操作系统的实现】练习-第1天-优快云博客

在尝试配置Bochs时遇到了LTDL_LIBRARY_PATH未设置和运行后出现'MOV_EwSw: can't use this segment register 1'的错误。通过查看官网解释，了解到需要选择VGA BIOS，并在bootsrc配置文件中调整display选项。然而，解决问题花费的时间远超预期。

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配置编译环境

问题一：配置bochs时出现问题

LTDL_LIBRARY_PATH not set. using compile time default '/usr/lib/bochs/plugins'
00000000000i[ ] BXSHARE not set. using compile time default '/usr/share/bochs'

来自官网的解释

"Examples:

  romimage: file=bios/BIOS-bochs-latest, address=0xfffe0000
  romimage: file=$BXSHARE/BIOS-bochs-legacy, address=0xffff0000
  romimage: file=mybios.bin, address=0xfff80000
  romimage: file=mybios.bin

The ROM BIOS controls what the PC does when it first powers on. Normally, you can use a precompiled BIOS in the source or binary distribution called BIOS-bochs-latest. The default ROM BIOS is usually loaded starting at address 0xfffe0000, and it is exactly 128k long. The legacy version of the Bochs BIOS is usually loaded starting at address 0xffff0000, and it is exactly 64k long. You can use the environment variable $BXSHARE to specify the location of the BIOS. The usage of external large BIOS images (up to 512k) at memory top is now supported, but we still recommend to use the BIOS distributed with Bochs. The start address is optional, since it can be calculated from image size."

"Examples:

  vgaromimage: file=bios/VGABIOS-elpin-2.40
  vgaromimage: file=$BXSHARE/VGABIOS-lgpl-latest
  vgaromimage: file=$BXSHARE/VGABIOS-lgpl-latest-cirrus

This tells Bochs what VGA ROM BIOS to load (at 0xC0000).

A VGA BIOS from Elpin Systems, Inc. as well as a free LGPL'd VGA BIOS are provided in the source and binary distributions.

Note: Please check with the vga option to decide what VGA BIOS to use.

最终解决方法：sudo apt-get install sdl

在配置文件bootsrc中添加： display:sdl

注释掉keyboard那行

二、运行之后无限刷 MOV_EwSw: can't use this segment register 1

复制书中代码后重新编译.asm

成功出现界面

【一个操作系统的实现】练习-第1天

问题一：配置bochs时出现问题

"Examples:

二、运行之后无限刷 MOV_EwSw: can't use this segment register 1

说好的十分钟为什么弄了几个小时，sad