The PC's Physical Address Space 


						+------------------+  <- 0xFFFFFFFF (4GB)
						|      32-bit      |
						|  memory mapped   |
						|     devices      |
						|                  |
						/\/\/\/\/\/\/\/\/\/\

						/\/\/\/\/\/\/\/\/\/\
						|                  |
						|      Unused      |
						|                  |
						+------------------+  <- depends on amount of RAM
						|                  |
						|                  |
						| Extended Memory  |
						|                  |
						|                  |
						+------------------+  <- 0x00100000 (1MB)
						|     BIOS ROM     |
						+------------------+  <- 0x000F0000 (960KB)
						|  16-bit devices, |
						|  expansion ROMs  |
						+------------------+  <- 0x000C0000 (768KB)
						|   VGA Display    |
						+------------------+  <- 0x000A0000 (640KB)
						|                  |
						|    Low Memory    |
						|                  |
						+------------------+  <- 0x00000000
posted @ 2024-03-02 12:27  Pril  阅读(29)  评论(0)    收藏  举报