X86的显存首地址

最新推荐文章于 2023-05-09 22:41:27 发布

原创最新推荐文章于 2023-05-09 22:41:27 发布 · 1.4k 阅读

CC 4.0 BY-SA版权

文章标签：

8 篇文章

订阅专栏

针对代码3.1，有如下語句

LABEL_DESC_VIDEO: Descriptor 0B8000h , 0ffffh, DA_DRW ;显存首地址

一直对0B8000h耿耿于怀，却不知该向哪里找资料，现在终于找到了。

下图摘自http://wiki.osdev.org/Memory_Map_%28x86%29

start	end	size	region/exception	description
Standard usage of the ROM Area
000A0000	000AFFFF	10000	video RAM	VGA framebuffer (64 KiB)
000B0000	000B7FFF	8000	video RAM	VGA text monochrome (32 KiB)
000B8000	000BFFFF	8000	video RAM	VGA text color (32 KiB)
000C0000	000C7FFF	8000	ROM	Video BIOS (32 KiB is typical size)
000C8000	000EFFFF	28000	ROMs and unusable space	Mapped hardware & Misc.
000F0000	000FFFFF	10000	ROM	Motherboard BIOS (64 KiB is typical size)