The ISA slot started as 8-bit, and then evolved to 16-bits.
Background Intelligent Transfer Service.
The original XT PC computers internal data bus was 8 bits wide and was called the ISA bus or Industry Standard Architecture An improvement to this design was the internal data bus that was 16 bits wide and named EISA or Extended Industry Standard Architecture EISA was the cutting edge design when the Intel 386 processor was introduced.
MCA is a 32 bit expansion bus
The different types of computer architecture makes it important to have different types of RAM that suit them. The architecture may be on the number of bits that the motherboard supports.
IA stands for Industrial Standard Architecture and is used for transfer data bits
You plug bits of circuit board into slots to gain extra functionality.
You plug bits of circuit board into slots to gain extra functionality.
The storage capacity of a register is determined by the architecture. Thus they are 32 bits long on a 32-bit system and 64 bits long on a 64-bit system.
PCI
Bits are way measuring data. Eight bits equal one byte. One thousand bytes equal one kilobyte. One thousand kilobytes equal one megabyte and so on.
In 32 bit address space it will most likely be 4 bytes, since 8 bits is a byte and 32 bits / 8 bits = 4. In 64 bit address space it should be 8 bytes (64 bits / 8 bits = 8). It is architecture dependent so use the sizeof() function.
The four binary units are bit (binary digit), nibble (4 bits), byte (8 bits), and word (usually 16, 32, or 64 bits depending on the computer architecture).