in which s designates the segment number, g indicates whether the segment is in the GDT or LDT,and p deals with protection.
The offset is a 32-bit number specifying the location of the byte within the segment in question.
The machine has six segment registers, allowing six segments to be addressed at any one time by a process.
It also has six 8-byte microprogram registers to hold the corresponding descriptors from either the LDT or GDT.
This cache lets the Pentium avoid having to read the descriptor from memory for every memory reference.