What does DI register do?
DI – This is the destination index register. It is of 16 bits. It is used in the pointer addressing of data and as a destination in some string related operations. It’s offset is relative to extra segment.
What is the CS register?
The CS(code segment register) is used to address the code segment of the memory i.e a location in the memory where the code is stored. The IP(Instruction pointer) contains the offset within the code segment of the memory.
Why do we need offset registers?
To get the exact location of data or instruction within a segment, an offset value (or displacement) is required. To reference any memory location in a segment, the processor combines the segment address in the segment register with the offset value of the location.
What is EAX used for?
eax is a 32-bit general-purpose register with two common uses: to store the return value of a function and as a special register for certain calculations. It is technically a volatile register, since the value isn’t preserved. Instead, its value is set to the return value of a function before a function returns.
What does EBX mean?
EBX
| Acronym | Definition |
|---|---|
| EBX | Electronic Book Exchange (XML standard) |
| EBX | Embedded Board Expandable (PC/104) |
| EBX | Environmental Banc & Exchange (various locations) |
| EBX | Electronic Business XML (Extensible Markup Language) |
What is a 32-bit register?
A 32-bit register can store 232 different values. The range of integer values that can be stored in 32 bits depends on the integer representation used.
Can 32 bit OS use more than 4GB?
An application on a 32 bit OS can access of 4GB of address space. But this is virtual address space and has absolutely nothing to with the size of physical RAM. Most modern 32 bit processors have sufficient address lines to address 64GB of RAM.
How much RAM can a 32 bit OS use?
The CPU register stores memory addresses, which is how the processor accesses data from RAM. One bit in the register can reference an individual byte in memory, so a 32-bit system can address a maximum of 4 gigabytes (4,294,967,296 bytes) of RAM.
How much RAM can a 32 bit program use?
2 GB
How do I make a 32 bit program use more RAM?
One of the simplest ways to increase the amount of memory a process can use on 32-bit Windows is to enable the /3GB flag in the Windows’ boot. ini file. This has the effect of adjusting the kernel/user address space split in favour of the application by 1GB, i.e. instead of a 2GB/2GB split you have a 3GB/1GB split.
What is the max RAM for a 64-bit?
Modern 64-bit processors such as designs from ARM, Intel or AMD are typically limited to supporting fewer than 64 bits for RAM addresses. They commonly implement from 40 to 52 physical address bits (supporting from 1 TB to 4 PB of RAM).