I586 registers

What are the two types of registers

32-bit and 16-bit registers

Register Categories of registers

• General registers
• Control registers
• Segment registers

Categories of general registers

• Data registers
• Pointer registers
• Index registers

Data registers

There are four data 32-bit data registers: EAX, EBX, ECX, EDX

• Lower halves of the 32-bit registers can be used as four 16-bit data registers: AX, BX, CX and DX.
• Lower and higher halves of the above-mentioned four 16-bit registers can be used as eight 8-bit data registers: AH, AL, BH, BL, CH, CL, DH, and DL.

External links

https://wiki.osdev.org/CPU_Registers_x86