linear address space การใช้

• The actual location of the beginning of a segment in the linear address space can be calculated with segment?6.
• A segment value of 0Ch ( 12 ) would give a linear address at C0h ( 192 ) in the linear address space.
• Programmers using this feature led to the Gate A20 compatibility issues in later CPU generations, where the linear address space was expanded past 20 bits.
• In principle the database storage can be viewed as a linear address space, where every bit of data has its unique address in this address space.
• IA-32 segments are subdivisions of the computer's " linear address space ", the virtual address space provided by the paging hardware.
• On the 8088, these address accesses were wrapped around to the beginning of the address space such that 65535 : 16 would access address 0 and 65533 : 1000 would access address 952 of the linear address space.
• However segmentation in 32-bit mode does not allow to access a larger address space than what a single segment would cover, unless some segments are not always present in memory and the linear address space is just used as a " cache " over a larger segmented virtual space.
• However it is lacked of integer general purpose register makes it different than its x86 counterpart . ), an 64-bit ALU, a 512?8-bit instruction RAM, a 512?6-bit data RAM, two internal 16-bit buses, a wide instruction word processor, a variable length sequence decoder, a pixel interpolator and an interface supporting a 4 GB linear address space.
• The last incarnations of the x86 architecture support up to 36 bits of physical memory addresses, which were mapped to the 32-bit linear address space through the 80286 processor, which, though supporting only 16 MB of physical memory, could access up to 1 GB of virtual memory, but the combination of 16-bit address and segment registers made accessing more than 64 KB in one data structure cumbersome.